Answers.Body: <p>It looks like it is 10X data and I strongly suggest a dedicated single cell analysis package such as Seurat. You will most likely end up using one of these anyway for data analysis.</p>
  <p><a href="https://satijalab.org/seurat/reference/read10x" rel="nofollow noreferrer">Read10X()</a> can be a good start. I don't remember whether it requires dedicated folders per sample though. Even if this is the case, you can create individual sample folders with a simple bash script, can be done within R as well.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2021-12-03T17:10:20.667Z
Answers.LastActivityDate: 2021-12-03T17:10:20.667Z
Answers.UserDisplayName: haci
Body: <p>I'm trying to read in an external single cell dataset from <a href="https://www.nature.com/articles/s41467-020-16164-1" rel="nofollow noreferrer">https://www.nature.com/articles/s41467-020-16164-1</a>, but I am having trouble reading in the count matrix.</p>
  <p>counts found here: <a href="https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE154778" rel="nofollow noreferrer">https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE154778</a></p>
  <p>This is how I've been reading in the raw counts.</p>
  <pre><code>cts = read.table(&quot;GSE154778_RAW.tar&quot;, sep=',', header=T, stringsAsFactors=F, check.names = FALSE)
  </code></pre>
  <p>The output is this:</p>
  <pre><code>&gt; head(test)
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            GSM4679532_K16733_barcodes.tsv.gz
  1                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     xVZ\xbe\xc6pܧj\x95I\xed\030\xee\xfe\xf8ޔ\x93\xa7\xbc\xf2\023\xed{\x8e\x98)w\\\xef:ܣN\xdfrr\xc7\xf5\f\xaa\xcb\001\xfa[\002\021@|a\x91\024\xab\xc5^\017\xc0O\xbd`7\x97&amp;m\xb9\x81\xe8R\x97{\x9f\023@\x9a\xf2\x81I\0368\x80N\027\xfa\xf8\x89fǾ6V\x98h\x9aF\023\x80\xef\x8f\xf2;f\xb1%@\xffif\004(4\xf4\037\020\xaf\x8d\032\037Y\021 1\xdd\xd9V\xc0\xde{\xf0U\017&lt;?\xd6\xe0D\x9b\x96\x8e\xc1\xd4s\xdb\024 
  2                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               *\x9b\xee5\xbb\xb3g\xab%\xa5r\xd7?\x82\x89V\xe5\177\xd5L4g\xe7?\xa2\x96\x8b\xaa\xf0\0215D\xd4\xe1\x87~D\xd9ou\xda\xe7?~\xab
  3                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         e\xb1\xe9ky\xb0w0Qy\xd7\xdd\xc6uaZ\xcb8\025-N\x96\xb6Y\xac\0015h\xeb\xe5\nL\xeb\xc4\177\x9cX\xbdU\016\xde\xcc\xdeAE\xa7\\w\xfcE_\001\xbb\026\xba\xe7\xf7ܳS'\x96\u038bI\xfe\x9a\xef\xfdm\xa2\xbf_瘺a\030\037\xec\xa3\032\x97\xa2\xea\x9e\xf3\xf40\x8d\xfb#\n\xa9\xb8vE\x94\x9b:\xef\xcb\xe5\xd5\xc69n\xe1\xbd\xcab\025\xc7\xfb|\fT\xb5\xfa\xea4lK\xb2\037)\xdfL\xfc\x8f\xf5yz\xa6D}\001/\xaak?̑\xe9\003\xf1\031\x94\xed~\xfdӳ\xc7B]\xca/\\\xfb\xa3%n
  4 \xef\xaa\xc4B\xe0]\xe5\xac6\x9e\xea\xbbe\xf9\x8a\xecch/nV5\xd1p_O\xb6N\034\xa9\xf3x\034\x98&amp;\025\xd75\xa7b\021\xb3v\xd6P\xf7D4~u\xb3\xab(\xf9\x9d\xb29^,\xd8\xf3v`B)\xc3c|&gt;'\xc36Z\016\xb4\0257x8\u07b5fb\xd1(\xb9\xbe\xe7WT.x\xaa5\xe4\xc1\xd6\xe6ny\f֟\fYST.\\\xd0\xf2h\xf6\x8d\xc5Q\x90o\xbc\xadG\004\xb1\x9el\xcb\xd8\037\xef\xd4\024Y\xf1Q.\xe3\x81FGZ\016\026t\xa4\xcaY\xf3\xb7\x95\017,\au\xe8\037\xcf\a\xb3\ab\001\x8d.\aճ\x8f\xe6\xc4h\xe5n8\xf7Sdg\xc5Z\xef\xaa\xcb!\xd6\xd0ӳ\x92\xa2\xc4Wݥ?\xcc\xc4\016\031\023\xaa\xe7\xb6-H^X\005\xb1ӡ\x9b\xe6\xfb\xf0\x9b\x9d\027q\xcbq\x9aEm%\036\xb3\xe9<span class="math-container">$f\xc8\xd6\005\xdb\xee\x8b\xec\xf5\xb9\xef'\xaa~\xad\xb3\xf9\x8fg\xb3\025\xe5h\xc9\xe9_\xee7v\x87\xa3\xf5\177,ǌ\x9c\016Z\f\xe6\xf353\027\0367=\xc0\002{\x89\037,\017\xd3Œ\030\034D/\xeeb\x8ct\033\xe5UD\xedϧ\xb9\xf1\xbe\xe2\034L\xa7o\xea\xff\xb9\xecŭ\x9b\036Õ\xdbM+&gt;Su$\\\xe0\xda2\xdbl?\xa2\xcc\v\xf4rS\xe4\027\x8aEdR9f\xb9N\022\xb4И@,e\xfe&lt;\x95gN\xb4Ć\x9b\xc7\xeb\032\xc7P~\xa2\034\xd8]\x98\032\te\xff\xd8!vr\xb0\xa6\x92K\xf0\xfd`*\xb3\xe8\aq\x90\x9e'\xe6FI\x84\xa3&lt;B\xeddE\xefpg\001V[\xbc\xb7u\xb04\003\xe3K\xb6h\xc0ild`\x92\025W\xe5#J\177\xa6\x95\xabZ.\x96\xec\016w\x93d÷+]Di\xbaJ\xa2\003\xf5\021m\xa4\x80J\022\f\027QqE\021r\x94\xf0\xbd\037\xd6ye\x970Fm\xa1ˎO\035\xfe\xe5\xb8\xf2/\x89\x9bX$\xa9b\026\037B~\xe2\023k\033\xbaB\xbcɪ\xa7\xe4f\xf2\027\x8f\xa2t\xa1\xee\xbd\xec\x80\xe5;\037\xbc\xfeC\x94\xed\x91UQ\x81~\xbe^N&lt;\003&amp;\xceDJE\xab\031\xa7\xf9\x9a\xa2\xf2%\024}\x9e.g\x9a0J&amp;lj\xd2\032\xc55~\022\xa3ޭ\xd3|\xd1,k#\017ֶ\xfbg\026CL\016\x9bx\023Y\x89\xffI\x85\x8c\x89&gt;U=\024|í\xb4\xf2\006\xfa#ʎ\032v\xc6Hps\034\fI\xef`E\xb1\xec\xcb\xf3\xc6\xf2E\xe5ӹ\xee1σc\x8b\x89\xe5\xf2\xd0\xe3\xf2\xeb\xac\xe5\xfb,&amp;N\002\x9b\xe14i\xc5\024y\xc8^Ď\xe73\n\006\022\x94TM\xc5p\xbf(\xb8w~ES\x8d&amp;N\xafr\xefL\f\xbf\x816~$</span>\x99\021A\xfe7m\tƘhX\xe0\xa2\xc2&gt;&amp;\xe5s\xa0\x99\t\004\x88\u07bd\xa34\xf6q\xe4\xf1ٕ\x9b\xea\003\xd7frq(~\xe7\024\035\xcf
  5                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 \x91\xb7U
  6                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               \x9f-\xcf\025\xa7\xeb6&lt;\x89\xf55\xc6+\xb9K\xb5\xbaa-[.\xda \xca]&lt;M\xea\xbd%
  </code></pre>
  <p>Any suggestions?</p>
  <p>Update:</p>
  <p>I unzipped the file in HPC but now I'm having trouble reading in the counts as it's all the counts per sample.</p>
  <pre><code>Data_Processing.nb.html            GSM4679535_T3_genes.tsv.gz     GSM4679540_T9_barcodes.tsv.gz      GSM4679544_Y00014_matrix.mtx.gz
  Data_Processing.Rmd                GSM4679535_T3_matrix.mtx.gz    GSM4679540_T9_genes.tsv.gz         GSM4679545_Y00016_barcodes.tsv.gz
  GSE154778_dgeMtx.csv.gz            GSM4679536_T4_barcodes.tsv.gz  GSM4679540_T9_matrix.mtx.gz        GSM4679545_Y00016_genes.tsv.gz
  GSE154778_RAW.tar                  GSM4679536_T4_genes.tsv.gz     GSM4679541_T10_barcodes.tsv.gz     GSM4679545_Y00016_matrix.mtx.gz
  GSM4679532_K16733_barcodes.tsv.gz  GSM4679536_T4_matrix.mtx.gz    GSM4679541_T10_genes.tsv.gz        GSM4679546_Y00019_barcodes.tsv.gz
  GSM4679532_K16733_features.tsv.gz  GSM4679537_T5_barcodes.tsv.gz  GSM4679541_T10_matrix.mtx.gz       GSM4679546_Y00019_genes.tsv.gz
  GSM4679532_K16733_matrix.mtx.gz    GSM4679537_T5_genes.tsv.gz     GSM4679542_Y00008_barcodes.tsv.gz  GSM4679546_Y00019_matrix.mtx.gz
  GSM4679533_Y00006_barcodes.tsv.gz  GSM4679537_T5_matrix.mtx.gz    GSM4679542_Y00008_genes.tsv.gz     GSM4679547_Y00027_barcodes.tsv.gz
  GSM4679533_Y00006_genes.tsv.gz     GSM4679538_T6_barcodes.tsv.gz  GSM4679542_Y00008_matrix.mtx.gz    GSM4679547_Y00027_genes.tsv.gz
  GSM4679533_Y00006_matrix.mtx.gz    GSM4679538_T6_genes.tsv.gz     GSM4679543_Y00013_barcodes.tsv.gz  GSM4679547_Y00027_matrix.mtx.gz
  GSM4679534_T2_barcodes.tsv.gz      GSM4679538_T6_matrix.mtx.gz    GSM4679543_Y00013_genes.tsv.gz     Lin_et_al_GMedicine_metadata.csv
  GSM4679534_T2_genes.tsv.gz         GSM4679539_T8_barcodes.tsv.gz  GSM4679543_Y00013_matrix.mtx.gz
  GSM4679534_T2_matrix.mtx.gz        GSM4679539_T8_genes.tsv.gz     GSM4679544_Y00014_barcodes.tsv.gz
  GSM4679535_T3_barcodes.tsv.gz      GSM4679539_T8_matrix.mtx.gz    GSM4679544_Y00014_genes.tsv.gz
  </code></pre>
  <p>I've created this loop to read through all the samples.</p>
  <pre><code>counts_list &lt;- list()
  for (sample in samples){
      print(sample)
      filename_header &lt;- sample
      barcode_file &lt;- file.path(wd3, paste(filename_header, &quot;_barcodes.tsv&quot;, sep=&quot;&quot;))
      gene_file &lt;- file.path(wd3, paste(filename_header, &quot;_genes.tsv&quot;, sep=&quot;&quot;))
      matrix_file &lt;- file.path(wd3, paste(filename_header, &quot;_matrix.mtx&quot;, sep=&quot;&quot;))
      counts &lt;- Matrix::readMM(matrix_file)
      barcodes &lt;- read.csv(barcode_file, sep=&quot;\t&quot;, header=F)
      barcodes &lt;- barcodes$V1
      colnames(counts) &lt;- barcodes
      genes &lt;- read.csv(gene_file, sep=&quot;\t&quot;, header=F)
      genes &lt;- genes[,-3]
      colnames(genes) &lt;- c(&quot;ENSG&quot;, &quot;Name&quot;)
      rownames(counts) &lt;- genes$ENSG
      genes &lt;- genes[!duplicated(genes$Name),]
      counts &lt;- counts[genes$ENSG,]
      rownames(counts) &lt;- genes$Name
      counts_list[[sample]] &lt;- counts
  }
  </code></pre>
  <p>Receive this error when I run:</p>
  <pre><code>counts &lt;- do.call(cbind, counts_list)
  Error: Matrices must have same number of rows in cbind2(argl[[i]], r)
  </code></pre>
  <p>I added:</p>
  <pre><code>genes &lt;- genes[,-3]
  </code></pre>
  <p>to ensure that all the gene file has only 2 columns as I noticed that one sample had 3 variables but I'm still erroring.</p>
  
Tags: <r><seurat><single-cell><data-preprocessing>
Title: Reading in external single cell data
ThreadText: # Reading in external single cell data
  
  (Asked by: username_0 on 2021-12-03)
  
  I'm trying to read in an external single cell dataset from <https://www.nature.com/articles/s41467-020-16164-1>, but I am having trouble reading in the count matrix.
  
  counts found here: <https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE154778>
  
  This is how I've been reading in the raw counts.
  
  ```
  cts = read.table("GSE154778_RAW.tar", sep=',', header=T, stringsAsFactors=F, check.names = FALSE)
  
  ```
  
  The output is this:
  
  ```
  > head(test)
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            GSM4679532_K16733_barcodes.tsv.gz
  1                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     xVZ\xbe\xc6pܧj\x95I\xed\030\xee\xfe\xf8ޔ\x93\xa7\xbc\xf2\023\xed{\x8e\x98)w\\\xef:ܣN\xdfrr\xc7\xf5\f\xaa\xcb\001\xfa[\002\021@|a\x91\024\xab\xc5^\017\xc0O\xbd`7\x97&m\xb9\x81\xe8R\x97{\x9f\023@\x9a\xf2\x81I\0368\x80N\027\xfa\xf8\x89fǾ6V\x98h\x9aF\023\x80\xef\x8f\xf2;f\xb1%@\xffif\004(4\xf4\037\020\xaf\x8d\032\037Y\021 1\xdd\xd9V\xc0\xde{\xf0U\017<?\xd6\xe0D\x9b\x96\x8e\xc1\xd4s\xdb\024 
  2                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               *\x9b\xee5\xbb\xb3g\xab%\xa5r\xd7?\x82\x89V\xe5\177\xd5L4g\xe7?\xa2\x96\x8b\xaa\xf0\0215D\xd4\xe1\x87~D\xd9ou\xda\xe7?~\xab
  3                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         e\xb1\xe9ky\xb0w0Qy\xd7\xdd\xc6uaZ\xcb8\025-N\x96\xb6Y\xac\0015h\xeb\xe5\nL\xeb\xc4\177\x9cX\xbdU\016\xde\xcc\xdeAE\xa7\\w\xfcE_\001\xbb\026\xba\xe7\xf7ܳS'\x96\u038bI\xfe\x9a\xef\xfdm\xa2\xbf_瘺a\030\037\xec\xa3\032\x97\xa2\xea\x9e\xf3\xf40\x8d\xfb#\n\xa9\xb8vE\x94\x9b:\xef\xcb\xe5\xd5\xc69n\xe1\xbd\xcab\025\xc7\xfb|\fT\xb5\xfa\xea4lK\xb2\037)\xdfL\xfc\x8f\xf5yz\xa6D}\001/\xaak?̑\xe9\003\xf1\031\x94\xed~\xfdӳ\xc7B]\xca/\\\xfb\xa3%n
  4 \xef\xaa\xc4B\xe0]\xe5\xac6\x9e\xea\xbbe\xf9\x8a\xecch/nV5\xd1p_O\xb6N\034\xa9\xf3x\034\x98&\025\xd75\xa7b\021\xb3v\xd6P\xf7D4~u\xb3\xab(\xf9\x9d\xb29^,\xd8\xf3v`B)\xc3c|>'\xc36Z\016\xb4\0257x8\u07b5fb\xd1(\xb9\xbe\xe7WT.x\xaa5\xe4\xc1\xd6\xe6ny\f֟\fYST.\\\xd0\xf2h\xf6\x8d\xc5Q\x90o\xbc\xadG\004\xb1\x9el\xcb\xd8\037\xef\xd4\024Y\xf1Q.\xe3\x81FGZ\016\026t\xa4\xcaY\xf3\xb7\x95\017,\au\xe8\037\xcf\a\xb3\ab\001\x8d.\aճ\x8f\xe6\xc4h\xe5n8\xf7Sdg\xc5Z\xef\xaa\xcb!\xd6\xd0ӳ\x92\xa2\xc4Wݥ?\xcc\xc4\016\031\023\xaa\xe7\xb6-H^X\005\xb1ӡ\x9b\xe6\xfb\xf0\x9b\x9d\027q\xcbq\x9aEm%\036\xb3\xe9$f\xc8\xd6\005\xdb\xee\x8b\xec\xf5\xb9\xef'\xaa~\xad\xb3\xf9\x8fg\xb3\025\xe5h\xc9\xe9_\xee7v\x87\xa3\xf5\177,ǌ\x9c\016Z\f\xe6\xf353\027\0367=\xc0\002{\x89\037,\017\xd3Œ\030\034D/\xeeb\x8ct\033\xe5UD\xedϧ\xb9\xf1\xbe\xe2\034L\xa7o\xea\xff\xb9\xecŭ\x9b\036Õ\xdbM+>Su$\\\xe0\xda2\xdbl?\xa2\xcc\v\xf4rS\xe4\027\x8aEdR9f\xb9N\022\xb4И@,e\xfe<\x95gN\xb4Ć\x9b\xc7\xeb\032\xc7P~\xa2\034\xd8]\x98\032\te\xff\xd8!vr\xb0\xa6\x92K\xf0\xfd`*\xb3\xe8\aq\x90\x9e'\xe6FI\x84\xa3<B\xeddE\xefpg\001V[\xbc\xb7u\xb04\003\xe3K\xb6h\xc0ild`\x92\025W\xe5#J\177\xa6\x95\xabZ.\x96\xec\016w\x93d÷+]Di\xbaJ\xa2\003\xf5\021m\xa4\x80J\022\f\027QqE\021r\x94\xf0\xbd\037\xd6ye\x970Fm\xa1ˎO\035\xfe\xe5\xb8\xf2/\x89\x9bX$\xa9b\026\037B~\xe2\023k\033\xbaB\xbcɪ\xa7\xe4f\xf2\027\x8f\xa2t\xa1\xee\xbd\xec\x80\xe5;\037\xbc\xfeC\x94\xed\x91UQ\x81~\xbe^N<\003&\xceDJE\xab\031\xa7\xf9\x9a\xa2\xf2%\024}\x9e.g\x9a0J&lj\xd2\032\xc55~\022\xa3ޭ\xd3|\xd1,k#\017ֶ\xfbg\026CL\016\x9bx\023Y\x89\xffI\x85\x8c\x89>U=\024|í\xb4\xf2\006\xfa#ʎ\032v\xc6Hps\034\fI\xef`E\xb1\xec\xcb\xf3\xc6\xf2E\xe5ӹ\xee1σc\x8b\x89\xe5\xf2\xd0\xe3\xf2\xeb\xac\xe5\xfb,&N\002\x9b\xe14i\xc5\024y\xc8^Ď\xe73\n\006\022\x94TM\xc5p\xbf(\xb8w~ES\x8d&N\xafr\xefL\f\xbf\x816~$\x99\021A\xfe7m\tƘhX\xe0\xa2\xc2>&\xe5s\xa0\x99\t\004\x88\u07bd\xa34\xf6q\xe4\xf1ٕ\x9b\xea\003\xd7frq(~\xe7\024\035\xcf
  5                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 \x91\xb7U
  6                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               \x9f-\xcf\025\xa7\xeb6<\x89\xf55\xc6+\xb9K\xb5\xbaa-[.\xda \xca]<M\xea\xbd%
  
  ```
  
  Any suggestions?
  
  Update:
  
  I unzipped the file in HPC but now I'm having trouble reading in the counts as it's all the counts per sample.
  
  ```
  Data_Processing.nb.html            GSM4679535_T3_genes.tsv.gz     GSM4679540_T9_barcodes.tsv.gz      GSM4679544_Y00014_matrix.mtx.gz
  Data_Processing.Rmd                GSM4679535_T3_matrix.mtx.gz    GSM4679540_T9_genes.tsv.gz         GSM4679545_Y00016_barcodes.tsv.gz
  GSE154778_dgeMtx.csv.gz            GSM4679536_T4_barcodes.tsv.gz  GSM4679540_T9_matrix.mtx.gz        GSM4679545_Y00016_genes.tsv.gz
  GSE154778_RAW.tar                  GSM4679536_T4_genes.tsv.gz     GSM4679541_T10_barcodes.tsv.gz     GSM4679545_Y00016_matrix.mtx.gz
  GSM4679532_K16733_barcodes.tsv.gz  GSM4679536_T4_matrix.mtx.gz    GSM4679541_T10_genes.tsv.gz        GSM4679546_Y00019_barcodes.tsv.gz
  GSM4679532_K16733_features.tsv.gz  GSM4679537_T5_barcodes.tsv.gz  GSM4679541_T10_matrix.mtx.gz       GSM4679546_Y00019_genes.tsv.gz
  GSM4679532_K16733_matrix.mtx.gz    GSM4679537_T5_genes.tsv.gz     GSM4679542_Y00008_barcodes.tsv.gz  GSM4679546_Y00019_matrix.mtx.gz
  GSM4679533_Y00006_barcodes.tsv.gz  GSM4679537_T5_matrix.mtx.gz    GSM4679542_Y00008_genes.tsv.gz     GSM4679547_Y00027_barcodes.tsv.gz
  GSM4679533_Y00006_genes.tsv.gz     GSM4679538_T6_barcodes.tsv.gz  GSM4679542_Y00008_matrix.mtx.gz    GSM4679547_Y00027_genes.tsv.gz
  GSM4679533_Y00006_matrix.mtx.gz    GSM4679538_T6_genes.tsv.gz     GSM4679543_Y00013_barcodes.tsv.gz  GSM4679547_Y00027_matrix.mtx.gz
  GSM4679534_T2_barcodes.tsv.gz      GSM4679538_T6_matrix.mtx.gz    GSM4679543_Y00013_genes.tsv.gz     Lin_et_al_GMedicine_metadata.csv
  GSM4679534_T2_genes.tsv.gz         GSM4679539_T8_barcodes.tsv.gz  GSM4679543_Y00013_matrix.mtx.gz
  GSM4679534_T2_matrix.mtx.gz        GSM4679539_T8_genes.tsv.gz     GSM4679544_Y00014_barcodes.tsv.gz
  GSM4679535_T3_barcodes.tsv.gz      GSM4679539_T8_matrix.mtx.gz    GSM4679544_Y00014_genes.tsv.gz
  
  ```
  
  I've created this loop to read through all the samples.
  
  ```
  counts_list <- list()
  for (sample in samples){
      print(sample)
      filename_header <- sample
      barcode_file <- file.path(wd3, paste(filename_header, "_barcodes.tsv", sep=""))
      gene_file <- file.path(wd3, paste(filename_header, "_genes.tsv", sep=""))
      matrix_file <- file.path(wd3, paste(filename_header, "_matrix.mtx", sep=""))
      counts <- Matrix::readMM(matrix_file)
      barcodes <- read.csv(barcode_file, sep="\t", header=F)
      barcodes <- barcodes$V1
      colnames(counts) <- barcodes
      genes <- read.csv(gene_file, sep="\t", header=F)
      genes <- genes[,-3]
      colnames(genes) <- c("ENSG", "Name")
      rownames(counts) <- genes$ENSG
      genes <- genes[!duplicated(genes$Name),]
      counts <- counts[genes$ENSG,]
      rownames(counts) <- genes$Name
      counts_list[[sample]] <- counts
  }
  
  ```
  
  Receive this error when I run:
  
  ```
  counts <- do.call(cbind, counts_list)
  Error: Matrices must have same number of rows in cbind2(argl[[i]], r)
  
  ```
  
  I added:
  
  ```
  genes <- genes[,-3]
  
  ```
  
  to ensure that all the gene file has only 2 columns as I noticed that one sample had 3 variables but I'm still erroring.
  
  **Tags:** r, seurat, single-cell, data-preprocessing
  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_1 on 2021-12-03. Score: 1
  
  It looks like it is 10X data and I strongly suggest a dedicated single cell analysis package such as Seurat. You will most likely end up using one of these anyway for data analysis.
  
  [Read10X()](https://satijalab.org/seurat/reference/read10x) can be a good start. I don't remember whether it requires dedicated folders per sample though. Even if this is the case, you can create individual sample folders with a simple bash script, can be done within R as well.
  
  
  ---
  
  