title: using awk remove filtered group
body: <p>i have an input</p>
  <pre><code>1   a   0,9
  1   b   0,8
  1   c   0,1
  2   d   0,5
  3   e   0,1
  3   f   0,7
  4   g   0,4
  4   h   0,3
  4   i   0,2
  4   j   0,1
  </code></pre>
  <p>using awk i want to remove filtered group
  if third column is greater than 0.6 i want to remove other rows which first columns equal.</p>
  <p>Desired Output:</p>
  <pre><code>2   d   0,5
  4   g   0,4
  4   h   0,3
  4   i   0,2
  4   j   0,1
  </code></pre>
  <p>I have used this, but this dont delete other rows.</p>
  <pre><code>awk  '($3 &lt; 0.6)'  file
  </code></pre>