How do I translate RGB color to a color on my patch Object?

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Abhay Aradhya
Abhay Aradhya 2017-6-7
评论： Walter Roberson 2017-6-7
X = [0 0 5; 0 0 5; 4 4 9];
Y = [0 4 0; 3 7 3; 0 4 0];
C = [0; .2422; 1];
figure
patch(X,Y,C);
Can anyone please help me find out how this value "0.2422" translates to its corresponding RGB value.
Matlab Documentation (" https://www.mathworks.com/help/matlab/creating_plots/how-patch-data-relates-to-a-colormap.html ") is not of much use in this directtion as well.!!

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KSSV
KSSV 2017-6-7
编辑：KSSV 2017-6-7
X = [0 0 5; 0 0 5; 4 4 9];
Y = [0 4 0; 3 7 3; 0 4 0];
figure
mycolor = 'r' ; % you can use 'r','b','g','c','m','k', etc..
patch(X,Y,mycolor);
  1 个评论
Abhay Aradhya
Abhay Aradhya 2017-6-7
Thank you that worked. But I wanted the RBG values to the color being put in.
X = [0 0 5; 0 0 5; 4 4 9];
Y = [0 4 0; 3 7 3; 0 4 0];
figure
mycolor = [1 0.76 0]
patch(X,Y,mycolor);
This did the tric

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更多回答（1 个）

Walter Roberson
Walter Roberson 2017-6-7
http://www.mathworks.com/help/matlab/ref/patch-properties.html#property_d0e726049
Cdatamapping defaults to scaled. You end up about 1/4 of the way through the color map.
  2 个评论
Abhay Aradhya
Abhay Aradhya 2017-6-7
Walter found a way to get it done
X = [0 0 5; 0 0 5; 4 4 9];
Y = [0 4 0; 3 7 3; 0 4 0];
figure
mycolor = [1 0.76 0]
patch(X,Y,mycolor);
This will assign the same color to all the triangles in this case. If you need to assign different colors then just pass the "patch" line through a loop and assign different colors to it. You could make a array of colors if that helps and loop it through.
Walter Roberson
Walter Roberson 2017-6-7
This is a different question than what you asked. You were asking how MATLAB determined which color got plotted given a particular data value, not how to force a particular face or edge to be a particular color.

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