## how to resize a given signal?

### Sivakumaran Chandrasekaran (view profile)

on 25 Mar 2013

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

Azzi Abdelmalek

on 25 Mar 2013

What is y5?

Walter Roberson

### Walter Roberson (view profile)

on 25 Mar 2013

Do the signals occupy exactly the same time duration ?

## Products

### Image Analyst (view profile)

on 27 Mar 2013
Edited by Image Analyst

### Image Analyst (view profile)

on 27 Mar 2013

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;
```

### Ahmed A. Selman (view profile)

on 27 Mar 2013

Use reshape

```Y=function(X,m,n)
```

It works for any input matrix (X) with number of elements (m x n). The output is Y with m-rows by n-columns. The size of X and Y must be the same.

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