The 'imread' function can be used to read your image and then the 'image' function can be used to plot it on cartesian axes in a figure.The colored areas can be plotted on top of this image using the 'patch' function. The color of this 'patch' object can be changed by setting the 'FaceColor' property. Here's some sample code to demonstrate:
% Create a figure
figure;
% Create axes
ax = axes; % Full figure size
% Load an image (replace 'your_image.png' with your image file)
img = imread('pic_matlab_question.png');
% Display the image in the axes
image(ax, img);
% You can add other plots/patches on top of the image
hold(ax, 'on');
p1 = patch([20,150,150,20],[10,10,70,70],'blue');
%You can change the color of the patch using 'FaceColor' property
p1.FaceColor = 'red';
%Dummy time series data
time = linspace(0, 10, 100);
data = linspace(0,1,100);
%Changes colour of patch according to the time series data
for i = 1:100
p1.FaceColor = [data(i), 0, 0];
pause(0.1);
end
