Re: [Gnuplot-info] how to plot a line in the contour map

[thorneliu <liu...@co...>]

Well,thanks
By the way, what can i do if I wanna just plot a line (not a contour line)
in this plot?

Thomas Sefzick wrote:
> 
> so you want not to plot 'just a line' but a contour line,
> that's easy:
> 
> set contour surface
> set cntrparam levels discrete 0
> set pm3d map
> splot 'matrix.dat' matrix
> 
> 
> thorneliu wrote:
>> 
>> Hello, every one!
>> Here is my question:
>>   I have a matrix data file (data in rows and collums),
>>   and I successfully got a contour figure by the following commands:
>>   
>>   set pm3d map
>> splot 'matrix.dat' matrix
>> 
>> Well, I got the figure as follows:
>>  http://old.nabble.com/file/p28812980/Dis1550.jpg 
>> 
>> So, what can I do if I wanna plot a line in this contour figure?
>> (I wanna plot the line where z=0 in the x y plane)
>> Thanks a lot!
>>  
>> 
> 
> 

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