Question: I'm using the tm package to apply stemming, and I need to convert the resulting data into a data frame. 
A solution for this can be found here [R tm package vcorpus: Error in converting corpus to data frame](https://stackoverflow.com/questions/24703920/r-tm-package-vcorpus-corpus-to-dataframe), but in my case I have the content of the corpus as:

```
[[2195]]
i was very impress

```

instead of

```
[[2195]]
"i was very impress"

```

and because of this, if I apply

```
data.frame(text=unlist(sapply(mycorpus, `[`, "content")), stringsAsFactors=FALSE)

```

the result will be

```
<NA>.

```

Any help is much appreciated!

Code below as an example:

```
sentence <- c("a small thread was loose on the sandals, otherwise it looked good")
mycorpus <- Corpus(VectorSource(sentence))
mycorpus <- tm_map(mycorpus, stemDocument, language = "english")

inspect(mycorpus)

[[1]]
a small thread was loo on the sandals, otherwi it look good

data.frame(text=unlist(sapply(mycorpus, `[`, "content")), stringsAsFactors=FALSE)

 text
1 <NA>

```

Answer: 
By applying

```
gsub("http\\w+", "", mycorpus)

```

the output has class = character, so it works in my case.
I'm unable to reproduce the problem using tm\_0.6 in R 3.1.0 on a Mac:

```
> data.frame(text=unlist(sapply(mycorpus, `[`, "content")), stringsAsFactors=FALSE)
                                                                 text
content a small thread was loos on the sandals, otherwis it look good

```

If I had gotten those undesired results I would have immediately tried:

```
 data.frame(text=unlist(sapply(mycorpus, `[[`, "content")), stringsAsFactors=FALSE)

```

... reasoning that since `'constent'` is a list-element name that `[['content']]` should have been able to so the serial extraction. It also looked to me that the unlist might not be needed with that approach:

```
> data.frame(text=sapply(mycorpus, `[[`, "content"), stringsAsFactors=FALSE)
                                                           text
1 a small thread was loos on the sandals, otherwis it look good

```