define different color for area
22 views (last 30 days)
Show older comments
Gianluca De Monaco
on 17 Nov 2021
Answered: Kelly Kearney
on 17 Nov 2021
Having diagramed the T function, I would like to color the upper triangle red and the lower one blue, without necessarily having to create two distinct areas. It's possible?
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/804049/image.jpeg)
n = 10;
Le = 10000;
xn = linspace(0,Le,n+1);
T = 89250-357*xn/20;
taglio = area(xn,T);
0 Comments
Accepted Answer
Kelly Kearney
on 17 Nov 2021
I don't think an area plot allows for multiple colors within a single area object. You could accomplish the color change using a patch object instead, but then you need to manually add the appropriate baseline:
n = 10;
Le = 10000;
xn = linspace(0,Le,n+1);
T = 89250-357*xn/20;
xp = [xn xn(end) xn(1) xn(1)];
yp = [T 0 0 T(1)];
cp = sign(yp);
hp = patch(xp, yp, cp);
set(gca, 'clim', [-1 1], 'colormap', [1 0 0; 0 0 1]);
I think it would be more straightforward to just use two area objects instead:
T1 = max(T, 0);
T2 = min(T, 0);
taglio1 = area(xn, T1, 'facecolor', 'b');
hold on;
taglio2 = area(xn, T2, 'facecolor', 'r');
0 Comments
More Answers (2)
Image Analyst
on 17 Nov 2021
You can use the FaceColor optio:
n = 10;
Le = 10000;
xn = linspace(0,Le,n+1);
T = 89250-357*xn/20;
taglio = area(xn,T, 'FaceColor', 'r');
You can use a 3 element RGB value instead of a letter if you want a custom color, like
myColor = [.5, .3, .2];
taglio = area(xn,T, 'FaceColor', myColor);
0 Comments
See Also
Categories
Find more on Blue in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!