You can leverage the "Color" attribute of the "plot" function with a for loop to iterate over each i to plot a graph of D versus C with different colors. You can refer to the following documentation to know more about the "Color" Name-Value argument:
Here is an example code as well for additional reference built-on top of your code:
clc;
clear all;
close all;
C = zeros(12, 49);
D = zeros(12, 49);
for i = 1:12
for j = 1:49
C(i, j) = i * j;
D(i, j) = i - j;
end
end
% Define colors for each 'i'
colors = lines(12); % Using the 'lines' colormap for 12 different colors
% Plot D versus C with different colors for each 'i'
figure;
hold on;
for i = 1:12
plot(D(i, :), C(i, :), 'Color', colors(i, :), 'DisplayName', ['i = ' num2str(i)]);
end
hold off;
xlabel('D');
ylabel('C');
title('Plot of D versus C');
legend('show');
grid on;
