Re: How to use table header as title inside for loops?

[Mojca M. <moj...@gm...>]

On Mon, Mar 9, 2009 at 17:46, Juergen Wieferink wrote:
>
>> May I request adding a simple example like this (using for loop and
>> "title column()") to
>>      http://gnuplot.sourceforge.net/demo/datastrings.html
>> ?
>
> From the code,
>
>  plot ... title column(<int expr>)
>
> does more or less the same as
>
>  plot ... title <int const>
>
> The command
>
>  plot ... title column
>
> without following "(" tries to guess which column to fetch data
> from, which in this case might be exactly what you want.  I do not
> like that "column" has two different meanings.
>
> As soon as it is documented or in the demos, this can never be
> changed.

One more question. I know that the order of reading parameters is a
pretty sensitive issue in gnuplot, but it nevertheless confused me
that
    plot for [n=2:5] 'data.dat' using 1:n title column with lines
    plot for [n=2:5] 'data.dat' using 1:n with lines title "something"
both work while
    plot for [n=2:5] 'data.dat' using 1:n with lines title column
fails. Is that behaviour "compatible" with previous and future
versions of gnuplot?

Also, I miss a bit two things. The first one being something like
   set format title "$a=%.2f$"
or some other way to transform title.

Let's say that legend (first line in data file) looks like
   0.001    0.1    1    1.5    2    2.5
and that I want to use the third to sixth column and generate
    $a=1,0$    $a=1,5$    $a=2,0$    $a=2,5$
as the title for some LaTeX terminal. I know that I can change the
label myself, but I cannot control the data and should make copies of
it first. I got used to be able to change
    set format y
so much that I sometimes want to misuse way it above its limits.

The second question: is there a way to say something like
    for [n=2:4,6,8:20,25,30:40]
? (I know that I can construct it myself from several commands, but
the for loop is really practical for long expressions that repeat
themselves anyway.)

Thanks a lot,
    Mojca