# How to draw a graph like the image attached below in MATLAB

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mertesacker on 8 Jul 2024
Edited: Aquatris on 8 Jul 2024
Hello, experts.
I would like to draw the picture below using Matlab. What function can I use to plot it?

VINAYAK LUHA on 8 Jul 2024
Hello Mertesacker,
To create a plot with a filled gradient color, you can use the MATLAB "patch" or the "fill" functions.
For implementation, you can refer to the examples provided in the documentation below:
Best regards,
Vinayak Luha

Aquatris on 8 Jul 2024
Edited: Aquatris on 8 Jul 2024
You can also use countourf function;
% random data from countour example
x = linspace(-2*pi,2*pi);
y = linspace(0,4*pi);
[X,Y] = meshgrid(x,y);
Z = sin(X) + cos(Y);
% define the shape to color
xv = [-4 -6 0 4 2 -4];
yv = [2 10 12 10 2 2];
[in,on] = inpolygon(X,Y,xv,yv);
% set data outside of the shape to NaN
Z(~in) = NaN;
contourf(X,Y,Z,10)
colorbar

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