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Groups > comp.graphics.apps.gnuplot > #2019

Re: histogram bar colors

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bryan wrote:

> On Sunday, September 1, 2013 7:46:22 PM UTC-4, sfeam wrote:
>> It will be easier to show "with boxes".
>> 
>> Add the following lines to your script:
>> 
>> barcolor(n) = strstrt(strcol(n), "0") ? 2 : 3
>> 
>> set boxwidth 0.2 absolute
>> 
>> and replace the plot command with
>> 
>> plot 'test_01sep13a.dat'  u 0:3:(barcolor(1)):xticlabel(1) \
>> 
>>       with boxes fillcolor variable notitle
>> 
>> The key point here is to specify "fillcolor variable",
> 
> thats interesting, and precisely what I was looking for - thanks a lot.
> also seems to be a good reason to get the latest patchlevel.

Oops, I had forgotten that some versions had a bug in recognizing
the "fillcolor variable" keyword.  Here is a slight variation that
should work also on older gnuplot versions starting from 4.4.


  barcolor(n) = strstrt(strcol(n), "0") ? 0xff0000 : 0x0000ff

  plot 'test_01sep13a.dat'  u 0:3:(barcolor(1)):xticlabel(1) \
       with boxes notitle lt rgb variable

The two colors in question are specified as 24-bit RGB colors
in hexadecimal form, pure red and pure blue in this case.

	Ethan

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histogram bar colors bryan <bryanlepore@gmail.com> - 2013-09-01 11:22 -0700
  Re: histogram bar colors sfeam <sfeam@users.sourceforge.net> - 2013-09-01 16:46 -0700
    Re: histogram bar colors bryan <bryanlepore@gmail.com> - 2013-09-01 19:31 -0700
      Re: histogram bar colors sfeam <sfeam@users.sourceforge.net> - 2013-09-03 12:40 -0700

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