#!/bin/bash
# Graph animation of input data

# Prepare separate frames
# For each frame
for (( i=1; i<=1000; i++ ))
do
   # Prepare data
   # Run gnuplot to make single frame
   (
   cat test.plot
   head -n "$i" data
   ) | gnuplot
   # Rename frame according to frame #
   mv out.png $( printf "%03d" "$i" ).png
done

# Join frames into animation
ffmpeg -i %03d.png anim.mp4

#Cleanup
rm *.png