stats

#!/bin/sh
#
# Runs an optimization multiple times, grades results against a threshold

GRY='\e[1;30m'
RED='\e[0;31m'
GRN='\e[0;32m'
YLW='\e[0;33m'
MGT='\e[0;35m'
CYN='\e[0;36m'
NRM='\e[0m'

exp_to_fixed () {
    echo $1 | sed -E 's/([+-]?[0-9.]+)[eE]\+?(-?)([0-9]+)/(\1*10^\2\3)/g'
}

args="$0 $*"
n_args=$(($# + 1))
printf "${GRY}args ${NRM}%s${GRY} [ ${MGT}%s${GRY} ]${NRM}\n" $n_args "$args" >&2

samples=$1
threshold=$2
places=$4
shift 2
args="$*"

passed=0
count=1
while [ $count -le $samples ]
do
    set -- $($args 2>&1 >/dev/null | tail -1)
    result=$*
    shift $(($# - 1))
    value=$(exp_to_fixed $1)
    thrsh=$(exp_to_fixed $threshold)
    if [ $(printf "scale=$((places + 3)); $value >= $thrsh;\n" | /usr/bin/bc) -eq 1 ]
    then
        failed=$((failed + 1))
        colour=${RED}
    else
        passed=$((passed + 1))
        colour=${GRN}
    fi
    printf "${GRY}%3s${NRM} ${colour}%s${NRM}\n" $count "$result"
    count=$((count + 1))
done

percent=$((100 * passed / samples))
if [ $percent -ge 90 ]
then
    colour=${GRN}
elif [ $percent -ge 70 ]
then
    colour=${CYN}
elif [ $percent -ge 20 ]
then
    colour=${YLW}
else
    colour=${RED}
fi
printf "${GRY} Passed${NRM} ${colour}%3s${NRM} %%\n" $percent >&2