A for loop with matrix as step
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Romain Gippa
am 18 Okt. 2019
Kommentiert: Romain Gippa
am 19 Okt. 2019
Hi,
This is my first question on mathworks. I apologize in advance if I am unclear.
I would like to make a for loop of 3 iterations. But my iterations need to be matrices (2000x2). To help you help me, here's what I would like to do, but I know it's not the right way :
A = importdata('CSTR3L_72rpm_50.txt', '\t');
B = importdata('CSTR3L_100rpm_50.txt', '\t');
C = importdata('CSTR3L_400rpm_50.txt', '\t');
injectiontime = [12, 150, 40];
i = 1;
for A:1:C
i = i+1;
A(:,1) = A(:,1) - injectiontime(i);
end
I have to treat a lot of data so it will be really helpfull to me !
Thank you very much for your interest
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Baium
am 18 Okt. 2019
Bearbeitet: Baium
am 18 Okt. 2019
I am also confused about what you want to do. You said you have multiple data sets. If you want to subtract one injectionTime element at a time from corresponding variable, it would be a similar way to Bob's.
z = [A, B, C, ...];
injectionTime = [12, 150, 40]
for i = 1:size(z, 2)
z(:, i) = z(:, i) - injectionTime(1, i);
end
If you want A, B, C, .., N each to be subtracted by ALL injectionTime elements,
z = [A, B, C, ...];
c = cell2mat(arrayfun(@(x) bsxfun(@minus, z, injectionTime(x)), 1:numel(injectionTime), 'UniformOutput', false));
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Bob Thompson
am 18 Okt. 2019
I'm confused what you're trying to do.
From the psuedo code you wrote it looks like you're trying to loop through each of the arrays A, B, and C, and subtract the corresponding value of injectiontime from the first column of each array. This is how I would accomplish that in a more common code.
A = importdata('CSTR3L_72rpm_50.txt', '\t');
B = importdata('CSTR3L_100rpm_50.txt', '\t');
C = importdata('CSTR3L_400rpm_50.txt', '\t');
injectiontime = [12, 150, 40];
A(:,1) = A(:,1)-injectiontime(1);
B(:,1) = B(:,1)-injectiontime(2);
C(:,1) = C(:,1)-injectiontime(3);
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