Grepping within nested for loops


 
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# 1  
Old 01-20-2009
Grepping within nested for loops

Good morning - I have publication lists from 34 different faculty members. I need to end up with the numbers of publications in common across all 34 faculty.

I need to grep person1 (last name) in list2, person1 in list3, person1 in list 4, etc., then person2 in list3, person 2 in list4, etc., then person3 in list4, etc.

I think (!) I need a nested for loop which I've never done before (my loops have always been along the lines of "foreach chr (1 2 3 4 5) do the following program"). VERY basic! I know a good bit of basic Unix and AWK, along with some Perl.

Any pointers will be much appreciated. Thanks, Peggy
# 2  
Old 01-20-2009
If it is no problem to seek every list for the names instead of skipping some, you could write the names into a file "namelist" for example and then do something like:

Code:
grep -lf namelist list*

Else you can write the names into a list like above also save the lists into an array, in ksh for example
Code:
...
set -A array `ls -1 list`
...

and then work the array by incrementing it's element's index by one in a for loop when working the array against the name list, using "grep -lf namelist ${array[n]}".
# 3  
Old 01-21-2009
Thanks very much! I haven't been able to get it to work with a list yet but will keep trying.
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