How to change the length and the values of a vector?

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Enrica Brunetti 2020-9-2

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https://ww2.mathworks.cn/matlabcentral/answers/587786-how-to-change-the-length-and-the-values-of-a-vector

评论： Enrica Brunetti 2020-9-2

I have a vector whose length = 503. I want to obtain a vector whose length is 100 or its multiple. I suppose I have to use some proportion, but I don't know how.

I think also the values of vector must change, but in which way? I think with the mean.

[madhan ravi: removed huge amount of data]

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采纳的回答

madhan ravi 2020-9-2

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https://ww2.mathworks.cn/matlabcentral/answers/587786-how-to-change-the-length-and-the-values-of-a-vector#answer_488384

在 MATLAB Online 中打开

n = numel(vector);
V = reshape([vector, nan(1, 1e2 - mod(n, 1e2))], [], 1e2);
Wanted = nanmean(V) 
%or
Wanted = mean(V, 'omitnan') 
%% or depending on which suits you the best
V = reshape([vector, nan(1, 1e2 - mod(n, 1e2))], 1e2, []);
Wanted = nanmean(V, 2) 
%or
Wanted = mean(V, 2, 'omitnan') 

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madhan ravi 2020-9-2

So , what do you propose?

Enrica Brunetti 2020-9-2

Is there any way to obtain the average within 100 values?

Or is it correct if I use the function imresize( vector, [1 100]);? In this way I get a vector of 100 values, even if I don't understand with which operations it obtains them.

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