#!/usr/bin/env bash

# @(#) s1       Demonstrate statistics for grouped data, datamash.

# Utility functions: print-as-echo, print-line-with-visual-space, debug.
# export PATH="/usr/local/bin:/usr/bin:/bin"
LC_ALL=C ; LANG=C ; export LC_ALL LANG
pe() { for _i;do printf "%s" "$_i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }
em() { pe "$*" >&2 ; }
db() { ( printf " db, ";for _i;do printf "%s" "$_i";done;printf "\n" ) >&2 ; }
db() { : ; }
C=$HOME/bin/context && [ -f $C ] && $C datamash

FILE=${1-data1}
E=expected-output.txt

pl " Input data file $FILE:"
cat $FILE

pl " Expected output:"
cat $E

pl " Results:"
datamash -t',' --sort --group=1 min 2 max 2 < data1 |
tee f1

pl " Verify results if possible:"
C=$HOME/bin/pass-fail
[ -f $C ] && $C || ( pe; pe " Results cannot be verified." ) >&2

pl " Details for datamash:"
dixf datamash

exit 0

$ ./s1

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 3.16.0-4-amd64, x86_64
Distribution        : Debian 8.7 (jessie) 
bash GNU bash 4.3.30
datamash (GNU datamash) 1.0.6

-----
 Input data file data1:
operation1,83621
operation2,72321
operation3,13288
operation2,12312
operation1,12321
operation2,45455
operation2,42543
operation1,87934
operation4,94865
operation5,27383
operation6,322
operation6,93483
operation7,3223

-----
 Expected output:
operation1,12321,87934
operation2,12312,72321
operation3,13288,13288
operation4,94865,94865
operation5,27383,27383
operation6,322,93483
operation7,3223,3223

-----
 Results:
operation1,12321,87934
operation2,12312,72321
operation3,13288,13288
operation4,94865,94865
operation5,27383,27383
operation6,322,93483
operation7,3223,3223

-----
 Verify results if possible:

-----
 Comparison of 7 created lines with 7 lines of desired results:
 Succeeded -- files (computed) f1 and (standard) expected-output.txt have same content.

-----
 Details for datamash:
datamash        command-line calculations (man)
Path    : /usr/bin/datamash
Version : 1.0.6
Type    : ELF 64-bit LSB executable, x86-64, version 1 (SYSV ...)
Help    : probably available with -h,--help
Repo    : Debian 8.7 (jessie) 
Home    : http://www.gnu.org/software/datamash