[Gretl-users] gnuplot: rowstacked histogram over time

Dear all, I know this is not the gnuplot forum but I hope that somebody knows how to solve this using gretl + gnuplot (v. 5 patchlevel 5). I want to plot a stacked barplot over time by providing the matrix 'mat' (rows=Time, cols=variables) and a vector 'xmat'. xmat is based on the $obsdate command holding daily dates in the format YYYYMMDD. My objective is to handle date strings on the x-axis correctly. But this drives me nuts... As you will see, for the moment I deactivated everything related to time and its formatting. I also took Jack's function for plotting the historical decomposition based on the SVAR package as a role model but somehow this doesn't work for me. I attached the function plus an example which results in the error: <gnuplot> plot '-' using 1:($2), '-' using 1:($2) ^ "/home/at/.gretl/gpttmp.DjR2By", line 25: Too many columns in using specification *** error in function stackplot, line 70 </gnuplot> Btw, do we have a function by retrieving the seconds since the Unix epoch (1970-01-01, 00:00 UTC). I am just curious as gnuplot can handle this time format (http://www.phy.ntnu.edu.tw/demolab/html.php?html=doc/gnuplot-doc/html/tim...). Thanks in advance, Artur