Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.graphics.apps.gnuplot > #3857

Re: Variable fill color for polygons when using "filledcurves closed"

Show all headers | View raw

Karl Ratzsch wrote:

> Am 10.01.2018 um 04:43 schrieb Hua Tong:
>> I want to plot polygons with filled color according to some variable
>> defined, e.g., in third column. In short, the data format is as
>> below:
> 
>> What I get is that the edge of each polygon is colored according to
>> the third column, but not the filled color.
> 
> (gnuplot version? following is done with 5.2pl2)
> 
> Hm, the following fills the polygons with the demanded colour
> alright. The last polygon breaks open if you remove the empty line
> behind it. Looks like a separate bug to me.
> 
> ===========
> $dat << EOD
> 1 1 10
> 1 2 10
> 2 2 10
> 2 1 10
> 
> 3 1 20
> 3 2 20
> 4 2 20
> 4 1 20
> 
> 1 3 40
> 1 4 40
> 2 4 40
> 2 3 40
> 
> EOD
> 
> #set yr [20:35]
> #plot $dat u 1:2:3 w filledcurves closed fillcolor palette
> plot $dat u 1:2:3 w filledcurves closed palette # does the same
> ============
> 
> If you uncomment the yr setting, the filling becomes monochrome,
> however. Seems "palette" and "filledcurves" don't agree on how to
> use the value in the third column.
> 
> All in all, also after trying to find it in the help, i think this
> is not really supposed to work.

Indeed. 
As the program sees it, the desired operation is not well-defined.  
Data in the 3rd column?  What should I do with it? A color?
But wait, what if the 3rd column number on the next line is different?
How can a filled area have a color that changes at each vertex? 

Back to comp.graphics.apps.gnuplot | Previous | Next — Previous in thread | Next in thread | Find similar

Thread

Variable fill color for polygons when using "filledcurves closed" Hua Tong <tonghuagg@gmail.com> - 2018-01-09 19:43 -0800
  Re: Variable fill color for polygons when using "filledcurves closed" Karl Ratzsch <mail.kfr@gmx.net> - 2018-01-10 09:11 +0100
    Re: Variable fill color for polygons when using "filledcurves closed" Ethan A Merritt <EAMerritt@gmail.com> - 2018-01-10 08:36 -0800
      Re: Variable fill color for polygons when using "filledcurves closed" Ethan Merritt <sfeam@users.sf.net> - 2018-01-10 18:10 +0000

csiph-web