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Full Discussion: A simpler way to do this (save a list of files based on part of their name)
Top Forums Shell Programming and Scripting A simpler way to do this (save a list of files based on part of their name) Post 302839451 by Don Cragun on Thursday 1st of August 2013 03:43:13 PM
Old 08-01-2013
Based on the data in your zip file and your current bash script, here is another bash script that seems to do what you want, but instead of hard coding the directory, field number, and number of files to be listed, it takes them as parameters:
Code:
#!/bin/bash
IAm=${0##*/}
Usage="Usage: $IAm directory field_number count"
if [ $# -ne 3 ] || ! cd "$1" > /dev/null || [ "$2" != "${2%*[^0-9]*}" ] ||
        [ "$3" != "${3%*[^0-9]*}" ]
then    echo "$Usage"
        exit 1
fi
ls *.out.txt | sort -t_ -k$2,$2n | awk -F_ -v f=$2 -v c=$3 '
NR > c {exit}
{       if(NR == 1) s = "st"
        else if(NR == 2) s = "nd"
        else if(NR == 3) s = "rd"
        else s = "th"
        printf("%d%s EV file\n%s\nEV MAE %d %s\n\n", NR, s, $0, NR - 1, $f)
}'

This script was tested using both bash and ksh, but should work with any POSIX conforming shell.

If you save this in a file named test2_copy.sh, make it executable with:
Code:
chmod +x test2_copy.sh

and execute it with:
Code:
./test2_copy.sh f0 1 3

you get the same output as you get if you run ./test_copy.sh:
Code:
1st EV file
48.93_E3200_55.94_E1900_34_ri_OA_f0_S1A_v17_52.26.1_4_ON_0.25lr.out.txt
EV MAE 0 48.93

2nd EV file
49.15_E2700_51.98_E1200_32_ri_OA_f0_S1A_v17_52.26.1_4_ON_0.25lr.out.txt
EV MAE 1 49.15

3rd EV file
49.16_E1600_52.54_E1600_44_ri_OA_f0_S1A_v17_52.26.1_4_ON_0.25lr.out.txt
EV MAE 2 49.16

but you can also run it with:
Code:
./test2_copy.sh f0 3 5

to produce:
Code:
1st EV file
50.62_E1700_51.92_E300_8_ri_OA_f0_S1A_v17_52.26.1_4_ON_0.25lr.out.txt
EV MAE 0 51.92

2nd EV file
49.15_E2700_51.98_E1200_32_ri_OA_f0_S1A_v17_52.26.1_4_ON_0.25lr.out.txt
EV MAE 1 51.98

3rd EV file
49.16_E1600_52.54_E1600_44_ri_OA_f0_S1A_v17_52.26.1_4_ON_0.25lr.out.txt
EV MAE 2 52.54

4th EV file
50.36_E3400_55.09_E3000_35_ri_OA_f0_S1A_v17_52.26.1_4_ON_0.25lr.out.txt
EV MAE 3 55.09

5th EV file
48.93_E3200_55.94_E1900_34_ri_OA_f0_S1A_v17_52.26.1_4_ON_0.25lr.out.txt
EV MAE 4 55.94

which gives you data sorted on the 3rd underscore delimited field and limited to the 1st 5 matching files. The color was added only to highlight the sort field; the actual output will not have red text.So, you could sort on the 5th field with:
Code:
./test2_copy.sh f0 5 5

to get:
Code:
1st EV file
50.62_E1700_51.92_E300_8_ri_OA_f0_S1A_v17_52.26.1_4_ON_0.25lr.out.txt
EV MAE 0 8

2nd EV file
49.15_E2700_51.98_E1200_32_ri_OA_f0_S1A_v17_52.26.1_4_ON_0.25lr.out.txt
EV MAE 1 32

3rd EV file
48.93_E3200_55.94_E1900_34_ri_OA_f0_S1A_v17_52.26.1_4_ON_0.25lr.out.txt
EV MAE 2 34

4th EV file
50.36_E3400_55.09_E3000_35_ri_OA_f0_S1A_v17_52.26.1_4_ON_0.25lr.out.txt
EV MAE 3 35

5th EV file
49.16_E1600_52.54_E1600_44_ri_OA_f0_S1A_v17_52.26.1_4_ON_0.25lr.out.txt
EV MAE 4 44

Note, however, that it is doing a numeric sort, so the results are unspecified if you select a field that isn't entirely a number.
This User Gave Thanks to Don Cragun For This Post:
LMHmedchem
 

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