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

Hello, experts.

I would like to draw the picture below using Matlab. What function can I use to plot it?

Answer 1

[VINAYAK LUHA]

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:

• https://www.mathworks.com/help/matlab/ref/fill.html#mw_fe77d2a1-24b9-474d-8e5f-81afb7727192
• https://www.mathworks.com/help/matlab/ref/patch.html#buscm5g-1

Additionally, you might find this MATLAB Answers post helpful:

• https://www.mathworks.com/matlabcentral/answers/847360-filling-inside-of-a-plot-with-color-gradient

Best regards,

Vinayak Luha

Answer 2

[Aquatris]

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