Hi,
I generate data files consisting of x,y data for a number of different times. I would like gnuplot to plot the data for each of the times, along with a title that is something like "t=0.1". So far I have been unsuccessful. I would appreciate suggestions. I can write the data file in any format that works. I am putting the data for each time sequentially in the file, with two blank lines between data sets. I am putting a line like TIME "t=0.1" at the start of each set. In other words, the file looks like TIME "t=0.1" 1 10 2 20 3 40 TIME "t=0.2" 1 20 2 30 3 53 and so forth. I have tried to plot it with plot "graph.dat" using 1:2:((column(2)) lc variable title columnheader This gives me the first (t=0.1) plot, with the correct title, but the remainder of the sets are plotted but have no title. I get a similar result with set key autotitle columnhead plot "graph.dat" using 1:2:((column(02)) lc variable I am using gnuplot 4.4, patchlevel 0. It seems this ought to be possible. Any help would be appreciated. Thanks. Frazer  ThinkGeek and WIRED's GeekDad team up for the Ultimate GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the lucky parental unit. See the prize list and enter to win: http://p.sf.net/sfu/thinkgeekpromo _______________________________________________ gnuplotinfo mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gnuplotinfo 
plot for [i=0:1] "graph.dat" using 1:2:2 index i lc variable title columnheader

Thomas Sefzick <t.sefzick <at> fzjuelich.de> writes:
> plot for [i=0:1] "graph.dat" using 1:2:2 index i lc variable title > columnheader Thanks. That almost works. I get the plots I want, with the graph lines in different colors, but the sample lines in the keys are all solid black, so the keys don't help a lot. Is there something else I should do? On related topic, it would also be nice if there were some way to read in the number of data sets from the input file, so I could write something like plot for [i=0:n] Is there any way to do that? It appears I can just write plot for [i=0:20] where 20 is assumed larger than the number of data sets I'll ever have. That gets me some warnings, but otherwise seems to work. Thanks for the response and for your time. Frazer  ThinkGeek and WIRED's GeekDad team up for the Ultimate GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the lucky parental unit. See the prize list and enter to win: http://p.sf.net/sfu/thinkgeekpromo _______________________________________________ gnuplotinfo mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gnuplotinfo 
In reply to this post by thse
Thomas Sefzick <t.sefzick <at> fzjuelich.de> writes: > plot for [i=0:1] "graph.dat" using 1:2:2 index i lc variable title > columnheader Thanks for the reply. Your suggestion almost works. When I use it, I get a plot with multiple lines, each with a different color. I also get a key with multiple titles, one for each line. The problem is that all the sample lines in the key are solid black, so it is difficult to know which line on the plot belongs with each title. Is there something else I should be doing? Also, a minor problem is that it would be nice to be able to determine the value of n from the file, something like plot for [i=0:n] where n is determined from "graph.dat". A workaround is plot for [i=0:20] where I assume the number of lines to be plotted is < 20. That gives some warnings, but works otherwise. Thank you for your time. Frazer P.S. I submitted this followup several days ago, but it didn't appear, so I'm reposting. I apologize if it becomes a multiple post.  ThinkGeek and WIRED's GeekDad team up for the Ultimate GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the lucky parental unit. See the prize list and enter to win: http://p.sf.net/sfu/thinkgeekpromo _______________________________________________ gnuplotinfo mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gnuplotinfo 
the black sample lines are due to a bug which is in version 4.4.0
the development version (4.5) works properly.

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