echo 'set terminal pngcairo color enhanced size 750,525 font ",10" ;' \
"$(< plot$i.gp)" | gnuplot > graph$i.png
convert -resize 150x105 -gamma 0.5 -quality 90 -type Palette -depth 8 graph$i.png tgraph$i.png
echo 'set terminal pngcairo color enhanced size 750,525 font ",10" ;' \
"$(< plot$i.gp)" | gnuplot > graph$i.png
convert -resize 150x105 -gamma 0.5 -quality 90 -type Palette -depth 8 graph$i.png tgraph$i.png