MATLAB: Need help with creating 500 column vector

vector

So this is the question from my college assignment;

Create a 500-element column vector P17M11 containing two hundred number 17's and followed by three hundred -11's

If I wanted to create separate columns for 17's and -11's, how would I write them so they can combine nicely?

Best Answer

The assignment does not ask for 500 columns, but one column with 500 elements: "500-element column vector".

 P17M11 = vertcat(17*ones(200,1),-11*ones(300,1))

You can learn these kind of basic MATLAB operations by working through the introductory tutorials:

https://www.mathworks.com/help/matlab/getting-started-with-matlab.html

https://www.mathworks.com/matlabcentral/answers/228557-experts-of-matlab-how-did-you-learn-any-advice-for-beginner-intermediate-users

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As i think this is an homework i'd suggest reading:

https://www.mathworks.com/help/matlab/ref/ones.html

https://www.mathworks.com/help/matlab/ref/size.html

and

https://www.mathworks.com/help/matlab/ref/mtimes.html

MATLAB: How to store <500x500> double in a loop

finalSF{e} should work. If you're getting an error, it's probably because finalSF already exists before the loop as something else than a cell array. To fix that:

finalSF = cell(1, 25); %before the loop.

Another option is to declare finalSF as a 3d array, since all your phi are the same size:

finalSF = zeros(500, 500, 25);
for idx = 1:25
   %calculate phi
   finalSF(:, :, e) = phi;
end

Best Answer

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MATLAB: How to store <500x500> double in a loop

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