> I have a need to draw many lines on one plot. On some of these lines I need to
> put a label saying what that line represents. As far as I read the manual we
> only get horizontal and vertical text placement. Is that true or is there some
> other way? ...
That is true. In gnuplot 3.6, labels, tic labels, and the ylabel can be written
vertically (by those terminals that can do so, of course) or horizontally, but
not at an arbitrary angle. gnuplot 3.5 can only rotate the ylabel. If you are
using the postscript terminal, you could easily edit the .ps file to rotate
text to any angle you want.
Quote:> ... I also need to read the x,y points and the text to label with from a
> data file, as I do not know the text until the generating program has produced
> the lines and the labels.
gnuplot has no way to read text from a file. When I've needed to do something
like this, I've written a preprocessor that reads the file and writes the
appropriate gnuplot commands to a file that I then "load" into gnuplot.
Sorry these answers aren't more positive ...