Hi,
To plot the Z variable as a colour scale using "imagesc" in MATLAB, you need to ensure that Z is in a matrix form that corresponds to the grid defined by X and Y. If Z is a vector, you need to reshape it into a matrix that matches the dimensions of the grid defined by X and Y. Refer to an example code below for better understanding:
% Define the variables
X = 1:1:5;
Y = 5:1:8;
Z = [1, 5, 0, 10, 2, 3, 4, 7, 6, 8, 9, 11, 12, 13, 14, 15, 16, 17, 18, 19];
% Ensure Z is reshaped into a matrix form
% Here, assuming Z corresponds to a 5x4 grid
Z_matrix = reshape(Z, [length(Y), length(X)]);
% Plot using imagesc
imagesc(X, Y, Z_matrix);
% Set axis properties
set(gca, 'YDir', 'normal'); % To have Y-axis in the correct direction
colorbar; % Display color scale
xlabel('X-axis');
ylabel('Y-axis');
title('Z variable color scale plot');
For more information on the "imagesc" function, refer to the below documentation:
