doing a boxcar or rectwin ?

Hello,

This is my first post here in this forum. I hope I get what I want.

I am a very beginner Matlab user. What I want to do is to plot multiple rectangle ( for fMRI block design , for ex: such as this one : ----__----__----__----__ ( or baseline block baseline block baseline ..etc) Of course this is not a perfect example. The most important thing that I am looking to do is the timing. For example I want the the baseline starts from 0 and last for 20 seconds. Then the rectangular box or the block starts from 20 and last to 40 seconds and so on. So a total of, for example, 10 blocks, 5 baselines and 5 task or box or blocks. So the total time is 10*20=200 seconds.

I tried different function in matlab such as rectwin or rectangularPulse but honestly I could not do it.

NB: I wan not sure whether I should post this here or in the question section!

Thanks

[Image Analyst]

This IS the question section. Not sure what you were thinking about. Newsgroup maybe?

Answer 1

[Image Analyst]

Use zeros() and ones() to make a cycle, then repmat to replicate it, like this demo:

rectWidth = 10;
oneCycle = [zeros(1, rectWidth), ones(1, rectWidth)];
% Plot it
subplot(2,1,1);
plot(oneCycle, 'bs-', 'LineWidth', 3);
grid on;
ylim([0 1.1]);
% Use repmat to make lots of them
numberOfCycles = 6;
multipleCycles = repmat(oneCycle, [1, numberOfCycles]);
% Plot it
subplot(2,1, 2);
plot(multipleCycles, 'bs-', 'LineWidth', 2);
grid on;
ylim([0 1.1]);
% Enlarge figure to full screen.
set(gcf, 'units','normalized','outerposition',[0 0 1 1]);