how to resize a given signal?

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Sivakumaran Chandrasekaran 2013-3-25

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https://ww2.mathworks.cn/matlabcentral/answers/68500-how-to-resize-a-given-signal

how to resize a given signal? My input signals are y2=[ 1 9385];yh=[1 37508]; I need to find y2+y5.

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Azzi Abdelmalek 2013-3-25

What is y5?

Walter Roberson 2013-3-25

Do the signals occupy exactly the same time duration ?

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Answer 1

Image Analyst 2013-3-27

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编辑：Image Analyst 2013-3-27

在 MATLAB Online 中打开

You'll probably want to use either interp1() or imresize(). Both are illustrated in the demo below:

clc;
clearvars;
y2 = rand(1, 9385);
y5 = rand(1, 37508);
% The easiest method, using imresize().
% Make y2 the same size as y5
y2Larger = imresize(y2, size(y5));
% Now sum them
output = y2Larger + y5;
% Alternative method using interp1
x = linspace(1, length(y5), length(y2));
xi = 1:length(y5);
y2Larger  = interp1(x, y2, xi)
% Now sum them
output = y2Larger + y5;