Body: <p>when I plotting the volcano plot, I got some dots very top of the Y-axis because their padj nearly reached 0（I checked the data, I think they are reliable）, so I followed the advice to add a very small value to padj(machine$double.xmin), but still got those dots formed a line. I think I heard these lines have a name like Texas arm(?) or Tech arm(?) something before, but I can't remember. Can someone tell me what's the name?
  Please help me. here is the plot :
  <a href="https://i.sstatic.net/x1r6d.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/x1r6d.png" alt="enter image description here" /></a></p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-01-14T11:04:30.240Z
Comments.Text: If there's a name for that then it's so obscure that if you used it in a paper the reviewers would have to google for it.
Comments.UserDisplayName: Devon Ryan
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-01-15T09:30:10.870Z
Comments.Text: @DevonRyan Yes, I think you are right. Maybe I'm misremembering. Anyway, thank you for your help!
Comments.UserDisplayName: Chu
Tags: <differential-expression><ggplot2>
Title: How to call this : some dots in volcano plot aligned a line after add a very small value to padj
ThreadText: # How to call this : some dots in volcano plot aligned a line after add a very small value to padj
  
  (Asked by: username_0 on 2021-01-13)
  
  when I plotting the volcano plot, I got some dots very top of the Y-axis because their padj nearly reached 0（I checked the data, I think they are reliable）, so I followed the advice to add a very small value to padj(machine$double.xmin), but still got those dots formed a line. I think I heard these lines have a name like Texas arm(?) or Tech arm(?) something before, but I can't remember. Can someone tell me what's the name?
  Please help me. here is the plot :
  [![enter image description here](https://i.sstatic.net/x1r6d.png)](https://i.sstatic.net/x1r6d.png)
  
  **Tags:** differential-expression, ggplot2
  
  > **Comments:**
  > **username_1**: If there's a name for that then it's so obscure that if you used it in a paper the reviewers would have to google for it.  
  > **username_0**: @username_1 Yes, I think you are right. Maybe I'm misremembering. Anyway, thank you for your help!  
  
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  ## 0 answers
  
  