gnuplot-info

[Gnuplot-info] Colored Rectangles in gnuplot

[Tom B. <tj...@op...>]

Can anyone tell me how to draw and place colored rectangles into a 2-d 
gnuplot.  I have bounding boxes for rectangles (Xlow, Ylow) (Xhigh, Yhigh) and 
a single number that represents a density parameter for the rectangle. I want 
to generate a 2-d plot of the rectangles colored by their density parameter. I 
have tried drawing boxxyerrorbars but can’t seem to fill each rectangle with a 
color proportional to the density function. I need to draw about a thousand 
rectangles per plot. Each rectangle represents a "macro" in a microporcessor 
design and i want to visualize several different views of macro "density" 
functions. 

Re: [Gnuplot-info] Colored Rectangles in gnuplot

[<br...@ph...>]

Tom Bucelot wrote:

> Can anyone tell me how to draw and place colored rectangles into a 2-d 
> gnuplot.  

See 'help boxes' and learn about the 'filled' option.

[Gnuplot-info] Re: Colored Rectangles in gnuplot

[Tom B. <tj...@op...>]

Hans-Bernhard Bröker <broeker <at> physik.rwth-aachen.de> writes:

> 
> Tom Bucelot wrote:
> 
> > Can anyone tell me how to draw and place colored rectangles into a 2-d 
> > gnuplot.  
> 
> See 'help boxes' and learn about the 'filled' option.
> 
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Thanks for the quick reply but I don’t think boxes will do the trick for me.  
I need to place my rectangles at arbitrary positions in the plot, not all 
touching the X axis. I also need to change the fill color on the fly. I can 
generate the rectangles that I want with  boxcxyerrorbars  but I don’t seem to 
be able to change the fill color on the fly. Is there a way to specify the 
fill color on the same data line that I specify the rectangle?  I really 
appreciate any help.

Re: [Gnuplot-info] Re: Colored Rectangles in gnuplot

[<br...@ph...>]

Tom Bucelot wrote:
> Thanks for the quick reply but I don’t think boxes will do the trick for me.  
> I need to place my rectangles at arbitrary positions in the plot, not all 
> touching the X axis. I also need to change the fill color on the fly. I can 
> generate the rectangles that I want with  boxcxyerrorbars  but I don’t seem to 
> be able to change the fill color on the fly. Is there a way to specify the 
> fill color on the same data line that I specify the rectangle?  I really 
> appreciate any help.

boxxyerrorbars is supposed to be fillable, too, including all the 
fillstyle options.  The colour of the fill will be controlled by the 
linetype, as usual in gnuplot up to 4.0.  If you need more control, get 
the 4.1 development version, or wait for the next release.