How do I align the matrices of variable sizes using the Dynamic time warping algorithm?

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Learner 2018-8-19

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关闭： MATLAB Answer Bot 2021-8-20

Data_For alignment.xlsx

Hello there,

I have a problem where there are three matrices X,Y,Z of variable sizes and I would like to align them all to the same uniform size, however, making sure that the information is not lost from the data. While browsing I came across a method called Dynamic time warping, however, I couldn't do much with the available examples. Can someone help me with this, attached is the spreadsheet with data.

Thanks in advance.

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Answer 1

Juan Rivera 2018-8-19

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编辑：Walter Roberson 2018-8-19

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Have you tried predetermining the size of the matrices before assigning values?

ex:

x = zeros(5); y = zeros(5); z = zeros(5);
x(:,1) = [1;1;1;1;1]; y(:,3) = [1;1;1;1;1]; z(:,5) = [1;1;1;1;1];
x, y, z

You can also insert null values to make matrices equivalent sizes.

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Learner 2018-8-20

The idea is to equalize the size of all three matrices making sure that the information is consistent throughout, the data I have attached has a trend, however, there was a bias in data acquisition. So, if I can stretch smaller matrix with reference to the larger one it would suffice the need.