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

[Juergen W. <wie...@fr...>]

>         if(isanumber(c_token)) {
>             column_for_key_title = int_expression();
>         } else {
>              column_for_key_title = (int)(real(const_express(&a)));
>         }

int_expression() does exactly the same as
(int)(real(const_express(&a))).

> May I request adding a simple example like this (using for loop and
> "title column()") to
>      http://gnuplot.sourceforge.net/demo/datastrings.html
> ?

Mmmh.  As far as I can see this feature is undocumented up to now.
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.

> Also, it would be very helpful to havea tiny bit of information or a
> simple sample available under
>     "help for"
>
> I have read again "help plot/title" and then "datastrings", but didn't
> find the any mention of "column". May I request adding some info on
> that?

Juergen