MATLAB: How to modify vector length

length modificationvectorvector modification

I have several vectors to compare, however they all slightly differentiate by length. I know that first numbers of vectors are zeros. Can I cut those number to get vectors of same length? I don't want to pad vectors with zeros, because in this case I wouldn't be able to calculate an error between vectors?

Or may be there is a way to calculate error ratio between two vectors, even if they have different length?

Best Answer

If cropping the zeros solves the problem, crop the zeros:

v = [0,0,1,2,3,4]
v = v(find(v, 1):length(v))

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MATLAB: Correlation between two row matrices

Like that, each value of "a" is correlated to each value of "b", but applying the formula of the correlation, the correlation of two single numbers is NaN. To compute the correlation correctly, traspose the input vectors

result  = corr(a', b');

MATLAB: How to change the length and the values of a vector

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')

Best Answer

Related Solutions

MATLAB: Correlation between two row matrices

MATLAB: How to change the length and the values of a vector

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