How to plot with diferents colors

Hello! I would like to differentiate types of filter and signals with and without noise, but I am not able to differentiate the noise part.

no_noise = plot(number_projections, SER_no_noise(:, :));

hold on;

with_noise = plot(number_projections, reshape(SER_with_noise(:, length(variance), :),...

[length(tests_to_run), length(number_projections)]));

h = [no_noise; with_noise];

legend(h, 'shep-logan NO NOISE','Cosine NO NOISE', 'ram-lak NO NOISE', 'Hann NO NOISE', 'Hamming NO NOISE',...

'shep-logan WITH NOISE','Cosine WITH NOISE', 'ram-lak WITH NOISE', 'Hann WITH NOISE', 'Hamming WITH NOISE')

Answer 1

[Ameer Hamza]

By default, the MATLAB axes only use seven colors to plot the lines. After that, the sequence is repeated if there are more then seven lines: https://www.mathworks.com/help/releases/R2020a/matlab/ref/matlab.graphics.axis.axes-properties.html#budumk7_sep_shared-ColorOrder. You can define your own colors to make them more distinguishable. For example

ax = axes()
ax.ColorOrder = rand(10,3); % define 10 rgb colors randomly. You can write your own matrix instead of using rand()

no_noise = plot(number_projections, SER_no_noise(:, :)); 
hold on;
with_noise = plot(number_projections, reshape(SER_with_noise(:, length(variance), :),...
            [length(tests_to_run), length(number_projections)]));
h = [no_noise; with_noise];
legend(h, 'shep-logan NO NOISE','Cosine NO NOISE', 'ram-lak NO NOISE', 'Hann NO NOISE', 'Hamming NO NOISE',...
 'shep-logan WITH NOISE','Cosine WITH NOISE', 'ram-lak WITH NOISE', 'Hann WITH NOISE', 'Hamming WITH NOISE')

Answer 2

[Image Analyst]

See attached demos.