Just adding some color to my question... This is how far I got. gnuplot x1 x2 x3 year --output=display \ { set style line 1 lc rgb "#ff0000"; \ set style line 2 lc rgb "#0000ff"; \ set style line 3 lc rgb "#00cc00"; \ set title "Teste"; \ set ylabel "US$ million" ; \ set grid ytics; \ set key left top; \ set style fill solid 0.3; \ set style data histograms; \ set style histogram rowstacked; \ set boxwidth 0.5 relative; \ plot '-' using 1:($2) title "kl" w boxes , \ '-' using 1:($2) title "hc" w boxes, \ '-' using 1:($2) title "tfp" w boxes;} This produces a bar chart of x1 x2 and x3, with year in the horizontal axis. But the bars are overlaid instead of stacked. On Thu, Aug 28, 2014 at 3:47 PM, Paulo Grahl <pgrahl(a)gmail.com <mailto:pgrahl@gmail.com>> wrote: Hello Gretl community, Does anyone have any tip on how to produce stacked bar plots in gretl? I've searched around, digged into gnuplot manual, but I'm still having a hard time figuring out how to produce a gretl script to generate stacked bar chart. Any help? Thanks -Paulo