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Old 05-01-2008
ghostdog74 ghostdog74 is offline Forum Advisor  
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Quote:
Originally Posted by raffi View Post
how can i output the number 2641569270623 from a text file called checkpoint.txt that is a one line file (generated by a maths sieving program) that looks like:
pmin=2641569270623,factor_count=8,cpu_secs=1705.793,frac_done=0.002592,elapsed_secs=1710.844

i tried sed -n "/pmin=/,/,factor/ p" checkpoint.txt | sed "$ d" which ouputs nothing and sed -n "/pmin=/,/,factor/ p" checkpoint.txt which output the whole line
until you are more familiar with regular expressions, you can use field based operations
Code:
awk -F"," '{ split($1,a,"="); print a[2] }' file
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Old 05-01-2008
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vgersh99 vgersh99 is offline Forum Staff  
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Code:
awk -F'[=,]' '{print $2}' file
sed 's#^[^=][^=]*=\([^,][^,]*\).*#\1#' file
Last edited by vgersh99; 05-01-2008 at 12:12 PM..
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