The plots below were generated with the commands shown. Note that EXIFplot only generates text files, and that I piped it into xmgrace in order to generate the output shown.
./EXIFplot -R $HOME/Pictures/ | /sw/bin/xmgrace -pipe
./EXIFplot -f2002:06:01 -t2002:06:11 -h6 $HOME/Pictures/travel/italy/*.JPG | sw/bin/xmgrace -pipe
./EXIFplot -R -f2002:08:30 -t2002:09:03 -m60 $HOME/Pictures/burningman/ | /sw/bin/xmgrace -pipe