set terminal png transparent size 640,240 set size 1.0,1.0 set terminal png transparent size 640,480 set output 'commits_by_author.png' set key left top set yrange [0:] set xdata time set timefmt "%s" set format x "%Y-%m-%d" set grid y set ylabel "Commits" set xtics rotate set bmargin 6 plot 'commits_by_author.dat' using 1:2 title "Franco Fichtner" w lines, 'commits_by_author.dat' using 1:3 title "Ad Schellevis" w lines, 'commits_by_author.dat' using 1:4 title "Shawn Webb" w lines