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POPrinting Selected Lines in Large File
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  1. POPrinting Selected Lines in Large File
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    copied!<p>I am new to AWK.</p> <p>I have a large text file (>3GB). Like to use AWK line command to extract/print selected lines (line #62, #152 and 153) in that order and it iterates every 217 lines till end of record in file.</p> <p>Tried to search and learn from the net. Tried the below and it does not seem working,</p> <pre><code>awk '{(for (i=62; i&lt;=NR; i=i+217)||for (i=62; i&lt;=NR; i=i+217)||for (i=62; i&lt;=NR; i=i+217)); print}' file.txt </code></pre> <p>and</p> <pre><code>count=62||152||153 awk '{if (++count%217==0) print;}' file.txt </code></pre> <p>Could you assist to give me some pointers or lead me to any web which might be of help.</p> <p>I am using this <a href="http://www.catonmat.net/blog/wp-content/uploads/2008/09/awk1line.txt" rel="nofollow">http://www.catonmat.net/blog/wp-content/uploads/2008/09/awk1line.txt</a> to learn.</p> <p>rgds Saravanan K</p> <p><strong>Update #1 - 21 Sept 2012 - 10.40pm</strong></p> <p>Tried </p> <pre><code>awk 'NR == 62 || NR == 152 || NR == 153 || NR % 217 == 0 {print $0;}' file.txt </code></pre> <p>Able to print line #62, #152 and #153 but not all the following iterations e.g #(62+217), #(152+217) and #(153+217) and so on.</p> <p>Tried the below too, but it is not working well.</p> <pre><code>awk '(NR == 62 || NR == 152 || NR == 153) &amp;&amp; (((NR-62) % 217==0) || ((NR-152) % 217 ==0)|| ((NR-153) % 217==0)) {print $0;}' file.txt </code></pre> <p><strong>Update #2 - 21 Sept 2012 - 10.55pm -- CLOSED</strong> </p> <p>I tried rmunoz idea with some tweaking. It worked like a magic. Thanks for rmunoz, with this I close this topic</p> <pre><code>awk '(NR - 62) % 217 == 0 || (NR - 152) % 217 == 0 || (NR - 153) % 217 ==0 {print $0;}' file.txt </code></pre>
 

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