title: How to remove rows with 0 values using R
body: <p>Hi am using a matrix of gene expression, frag counts to calculate differentially expressed genes. I would like to know how to remove the rows which have values as 0. Then my data set will be compact and less spurious results will be given for the downstream analysis I do using this matrix.</p>
  
  <p>Input</p>
  
  <pre><code>gene    ZPT.1   ZPT.0   ZPT.2   ZPT.3   PDGT.1  PDGT.0
  XLOC_000001 3516    626 1277    770 4309    9030
  XLOC_000002 342 82  185 72  835 1095
  XLOC_000003 2000    361 867 438 454 687
  XLOC_000004 143 30  67  37  90  236
  XLOC_000005 0   0   0   0   0   0
  XLOC_000006 0   0   0   0   0   0
  XLOC_000007 0   0   0   0   1   3
  XLOC_000008 0   0   0   0   0   0
  XLOC_000009 0   0   0   0   0   0
  XLOC_000010 7   1   5   3   0   1
  XLOC_000011 63  10  19  15  92  228
  </code></pre>
  
  <p>Desired output</p>
  
  <pre><code>gene    ZPT.1   ZPT.0   ZPT.2   ZPT.3   PDGT.1  PDGT.0
  XLOC_000001 3516    626 1277    770 4309    9030
  XLOC_000002 342 82  185 72  835 1095
  XLOC_000003 2000    361 867 438 454 687
  XLOC_000004 143 30  67  37  90  236
  XLOC_000007 0   0   0   0   1   3
  XLOC_000010 7   1   5   3   0   1
  XLOC_000011 63  10  19  15  92  228
  </code></pre>
  
  <p>As of now I only want to remove those rows where all the frag count columns are 0 if in any row some values are 0 and others are non zero I would like to keep that row intact as you can see my example above.</p>
  
  <p>Please let me know how to do this.</p>