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

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.

Answer 1

[Juan Rivera]

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.

[Learner]

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.