Re: [Gnuplot-info] plot with table

[Ethan M. <eam...@gm...>]

On Tue, Aug 21, 2018 at 3:33 PM, Patrick Dupre <pd...@gm...> wrote:

> Hello,
>
> Something is escaping to me.
> I tried:
>
> set table "out.asc"
> plot $DATA u (x=$1):(ampl*d_Lor_D (x-x0, W)+offset) with table
> unset table
>
>
> But the number of samples is ignored


That is because there is no sampling.  You have asked it to print
one line of output for each line in $DATA.   The first value on that line is
echoed from $DATA, the second value is a function of the first.

while
> plot $DATA u 1:2
> replot ampl*d_Lor_D (x-x0, W)+offset
> has the right number of sample
>

Here you generate two plots.
The first one has one line for each line in $DATA.
The second one samples a function, where the number of samples
is controlled by "set sample".
There is no intrinsic relationship between the x values in the first plot
and those in the second.

How can I fix the issue
>


It is not clear what you are aiming for.
Are you trying to fit and re-sample the values held in $DATA?
That would require a rather different set of commands, either
based on "fit" or "smooth".

    Ethan






> Thank
>
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>  Patrick DUPRÉ                                 | | email: pd...@gm...
>  Laboratoire de Physico-Chimie de l'Atmosphère | |
>  Université du Littoral-Côte d'Opale           | |
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