ファイルの数をどのように操作しますか？

これはどうですか…確かに大きな台無しです。

thisScript Prob01.txt 0.75 0.25各反応に対して、最初の+/-75％変更と3番目の値+/-25％変更の組み合わせを適用し、それを別のファイルに書き込むにはそれを呼び出します。

#!/bin/bash
#takes $inputFile $pct1 $pct3
#note $pct is the multiplier expressed as a decimal

#global variables
#$w       : the line number and original figures, space separated
#$newFile : the new file name
#$o       : the original figures in the original format
#$n       : the new figures in the correct format
inputFile=$1
#strip the suffix (.txt) from the inputFile name 
outFile=${inputFile%.*}
pct1=$2
pct3=$3

function domath {
    # takes $value $multiplier
    local m=$(echo 1+$2 | bc -l)
    local theanswer=$(echo $1 $m | awk '{printf "%7.6E\n" , $1*$2}' | sed -E -e 's/[Ee]\+*/E/g' -e 's/^([^-])/+\1/g')
    echo $theanswer
}

function makechange {
    #takes $reaction $case
    #compose new file name
    newFile=${outFile}_$1_$(printf "%02g" $2).txt
    #make a copy
    cp $inputFile $newFile
    #change the appropriate line
    sed -i "${w[0]}s/$o/$n/" $newFile
}

#get all the reaction names
grep -Po "^r[0-9]+f(?=:)" Prob01.txt > stepA

#get all the figures and their line numbers in case duplicates occur
grep -Pon "^\+[^\!]*" Prob01.txt > stepB

for ((i=1; i<=$(cat stepA | wc -l); i++)); do
    reaction=$(sed "${i}q;d" stepA)
    figures=$(sed "${i}q;d" stepB | sed 's/:/ /g')
    w=($figures)
    #retrieve the old string
    o=$(echo $figures | grep -Po "(?<= ).*")
    #compose the new string for each of the 4 cases
    for ((j=1; j<=4; j++)); do
        case $j in
            1)
                n=$(echo "$(domath ${w[1]} $pct1)  ${w[2]}  ${w[3]}")
                ;;
            2)
                n=$(echo "$(domath ${w[1]} -$pct1)  ${w[2]}  ${w[3]}")
                ;;
            3)
                n=$(echo "${w[1]}  ${w[2]}  $(domath ${w[3]}  $pct3)")
                ;;
            4)
                n=$(echo "${w[1]}  ${w[2]}  $(domath ${w[3]}  -$pct3)")
                ;;
        esac
        #make the changes
        makechange $reaction $j
    done

done
#clean up
rm step{A..B}