Re: [Gnuplot-bugs] help on contour plot

[Hans-Bernhard B. <HBB...@t-...>]

hania mohamed wrote:

> I would like to plot a data file of 3 columns as a contour plot(density plot).

You're not making terribly much sense.  What's it going to be: a contour 
plot, a density plot, or a colour map?  You say you want the first two, 
but order the third:

> set pm3d map
> set dgrid3d 10,10
> 
>  splot 'myfile'
> ------------------

> But, it is giving me unclear plot, as the data file should plot a
> triangular , but the plot give me some rectangular meshed area and 
> the triangular inside. 

I guess you're not quite aware of that, but: you asked gnuplot to do 
exactly that.  The dgrid3d command transforms your data.  If you didn't 
want that, you shouldn't have used dgrid3d.