title: Several Grubbs tests simultaneously in R
body: <p>I'm new using R, I'm just starting with the outliers package. Probably this is very easy, but could anybody tell me how to run several Grubbs tests at the same time? I have 20 columns and I want to test all of them simultaneously.
  Thanks in advance </p>
  
  <p>Edit: Sorry for not explaining well. I'll try. I started using R today and I learned how to make Grubbs test using grubbs.test(data$S1, type=10 or 11 or 20) and it goes well. But I have a table with 20 columns, and I want to run Grubbs test for each of them simultaneously. I can do it one by one, but I think there must be a way to do it faster.
  I ran the code at <a href="https://stackoverflow.com/questions/22837099/how-to-repeat-the-grubbs-test-and-flag-the-outliers/22841478">How to repeat the Grubbs test and flag the outliers</a> as well, and works perfectly, but again, I would like to do it with my 20 samples.
  As an example of my data:</p>
  
  <p><code>S1    S2  S3  S4  S5  S6  S7
  96  40  99  45  12  16  48
  52  49  11  49  59  77  64
  18  43  11  67  6   97  91
  79  19  39  28  45  44  99
  9   78  88  6   25  43  78
  60  12  29  32  2   68  25
  18  61  60  30  26  51  70
  96  98  55  74  83  17  69
  19  0   17  24  0   75  45
  42  70  71  7   61  82  100
  39  80  71  58  6   100 94
  100 5   41  18  33  98  97</code></p>
  
  <p>Hope this helps.</p>