Re: Plotting undefined values

ratztafaz wrote:

> However, I would like to simply not plot any value at all where there
> is no data defined. Is this possible? If I dont use dgrid3d it says:
> 
> gnuplot> set pm3d interpolate 2,1
> gnuplot> splot 'f1.txt' u 1:2:3 with pm3d
>   Warning: Single isoline (scan) is not enough for a pm3d plot.
>            Hint: Missing blank lines in the data file? See 'help pm3d'
> and FAQ.

The error message tells you what's wrong.  Your data has no grid 
structure --- it's a linear sequence of data with no way for gnuplot to 
deduce how it's supposed to form a surface.  See "help splot data".

> any ideas? Can I define a value as undefined in the data file?

See "help missing"