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subtracting 1.5 from column using awk and saving the changes

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# 1  
Old 02-11-2010
subtracting 1.5 from column using awk and saving the changes
Code:
# foreach sub ( sub001 )
sub=sub001
cd /mnt/stor/smith/recog/$sub/event_files/timecorrected/
awk '{$1-1.5}' $sub_CR
end

What im trying to do is:
1. open a 1D file that consists of lists of integers in rows a columns
2. subtract 1.5 from each integer in the first column
3. save the file (same filename same directory) basically overwriting it.

What is my awk command missing?

Thanks!
Last edited by Scott; 02-11-2010 at 04:34 PM.. Reason: Code tags, please...
# 2  
Old 02-11-2010
The awk command should be:
Code:
awk '{$1-=0.5; print}' file

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