Re: [Gnuplot-info] Dynamic labels

[BBands <bb...@gm...>]

Hi Dave,

I don't think that you are even close to pushing gnuplot's limits.
Have a look here:

http://www.gnuplotting.org/

Then, as a practical matter, try reading this:

http://gnuplot.sourceforge.net/docs_4.2/node69.html

Best,

     John


On Wed, Oct 8, 2014 at 1:57 PM, Dave Horsfall <da...@ho...> wrote:
> Continuing in my quest to push Gnuplot to its limits, I'd like to be able
> to set the title of a graph to the dates of the first and last data.  I'm
> envisaging something like:
>
>     set title "Plot of Blah\nFrom $first to $last\n(Use at own risk)"
>
> etc, where $first and $last are set from the first and last data lines.
> I know that I can get this by reading the x-axis itself, but it's a bit
> cleaner if it's part of the multi-line title.
>
> Not knowing the innards of Gnuplot, I'm hoping that the title can be
> printed dynamically in the first place, so a Small Matter Of
> Programming(tm) should extract what I want, if possible.
>
> Something like:
>
>     Grab first date => $first.
>     Keep reading until EOF.
>     Grab last date => $last.
>     sprintf("Plot of Blah\nFrom %s to %s", $first, $last) into title.
>     Plot.
>
> (My next question will be whether it's possible to print the names of the
> script and data files, when I print the graph date; I'm a data-driven sort
> of guy.)