#! /bin/bash
# Last edited on 2009-08-22 18:46:53 by stolfi

usage="${0##*/} MAXORDER PLTFILE"

if [ $# -ne 2 ]; then
  echo "usage: ${usage}"; exit 1
fi

maxorder="$1"; shift
pltfile="$1"; shift

name=${pltfile%.*}
tmp="/tmp/$$"

pics=()
for k in `count 0 ${maxorder}` ; do 
  out="${tmp}-${k}.png"
  plot-one-derivative ${k} ${pltfile} > ${tmp}-${k}.png
  pics=( ${pics[@]} ${out} )
done

convert -append ${pics[@]} -noop  ${name}.png
/bin/rm -f ${pics[@]}

if [[ -s ${name}.png ]]; then
  display ${name}.png
else
  echo "** ${name}.png does not exist or has zero size" 1>&2; exit 1
fi