How can I store values from loops in a vector?

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Philippe Corner
Philippe Corner 2017-1-5
回答： Image Analyst 2017-1-5
If I have a column of 50 rows and I want to store in a new vector the sum of first to third row, then second to fourth, etc.. how could be the code? thanks in advance

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回答（3 个）

turquoise_squid
turquoise_squid 2017-1-5
reshape the vector with the command 'reshape' to a n x m matrix and perform the mean on its rows.
Steven Lord
Steven Lord 2017-1-5
Use the movsum function.
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Philippe Corner
Philippe Corner 2017-1-5
Hey bud, this is the code im using:
if true
% code
end
clear all
[P1,P2,P3,P4] = textread('Octubre207.txt','%f %f %f %f','delimiter',';');
P3(P3 == -999) = 0;
A=reshape(P3,1440,31);
S=sum(A)';
movsum(A,31,3)
And command windows shows: Undefined function or variable 'movsum'. do you know what's the mistake?

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Image Analyst
Image Analyst 2017-1-5
Try conv():
data = rand (50, 1); Sample data.
kernel = [1;1;1]/3; % Kernel to computer the mean of 3.
movingMeans = conv(data, kernel, 'valid') % Mean of 1-3, 2-4, 3-5, etc.

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