how to zero pad a vector to have the same amount of data as a vector with more data?

Question

Will Banks 2023-11-13

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评论： Will Banks 2023-11-14

I have read multiple other threads with questions similar to this, however none of these were able to work in my case.

quick description: i have two audio signals. the "verb" signal is longer than the "in" signal. I want to change the "in" signal to have the same amount of data (i.e, the length of verb = length of in), using zero padding.

Can someone please walk me through how to achieve this? I have tried many things. Here is the code that reads the inputs as well as my best attempt to zero pad the "in" signal.

thank you for your help

%%% goal: to have the length of 'in' equal the length of 'verb' 
%%% define inputs
[in, fs] = audioread('smash_hit.wav'); % input signal defined
in = in(:,1); % converts signal to mono, if needed
[verb, ~] = audioread('warehouse.wav'); % reverb response signal defined
verb = verb(:,1); % converts signal to mono, if needed
in_padded = [in, zeros(1, length(verb))];

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Answer 1

Stephen23 2023-11-13

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Simpler:

in(end+1:numel(verb)) = 0;

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Answer 2

Paul 2023-11-13

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As of R2023b: paddata

in_padded = paddata(in,numel(verb));

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Will Banks 2023-11-14

thank you!!

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Answer 3

Les Beckham 2023-11-13

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Try this:

%%% goal: to have the length of 'in' equal the length of 'verb' 
%%% define inputs
[in, fs] = audioread('smash_hit.wav'); % input signal defined
in = in(:,1); % converts signal to mono, if needed
[verb, ~] = audioread('warehouse.wav'); % reverb response signal defined
verb = verb(:,1); % converts signal to mono, if needed
% in_padded = [in, zeros(1, length(verb))];
in_padded = [in, zeros(1, length(verb) - length(in))]; % <<< corrected this line