How can I reshape and resize an array?

I am trying to divide a signal (audio file) into frames with a length of 128.

I'm using the reshape() function but the problem is that the number of samples cannot be divided by 128 so I am getting an error "To RESHAPE the number of elements must not change.".

The solution I thought of is to increase the number of elements in the array to the next multiple of 128 before using the reshape() function. So far I have written code for calculating the number of elements I should extend the array by (copy/pasted below). I am looking for a way to extend the array by the calculated number of elements.

It feels like this should be a pretty simple task but I am fairly new to Matlab so I don't yet know the syntax.

[x,fs] = audioread('audio.wav');

windowLength = 128;

frames = length(x)/windowLength;

frames = ceil(frames);

extend = windowLength*frames - length(x);

Answer 1

[Walter Roberson]

If you have the Signal Processing Toolbox, use buffer()

[Hanuman Crawford]

Thanks! I just tried this and it worked perfectly.