Selecting rows based on number in first row and assigining it to a new variable name

Hello,

I'm triying to fit my training data to my test data and split everything up. there's six different actvities I'm trying to filter, so i tried this:

for n = 1:6

eval(['X_test_' num2str(n) '= X_test_y(X_test_y(:,1) == n),:)']);

end

So the desired outcome is to get X_test_1, which contains the data of X_test_y where the first column contains a 1.

and so on for X_test_2 , etc

this doesn't work, but when I try X_test_1 = X_test_y(X_test_y(:,1) == 1,:); it does work to get a good X_test_1.

any tips on how to do this in a For loop?

Answer 1

[Guillaume]

The answer to your question is simple: don't do that

This post explains the many reasons why it's a very bad idea to dynamically name variables. Use a cell array, a structure, a map, whatever data type of your liking that can be easily indexed instead.