Ttest2 on 2 matrices - does it operate on columns sequentially?

Hi , I am getting myself confused about what type of Matlab function I need to use to effectively TTest two matrices one of size 3390 x 90 and the second 2160x 90 . The columns are identical in both, just the rows vary in length

I want to T Test Col 1 of the first matrix with Col 1 of second matrix , Col 2 with Col 2 and so on up to Col 90 .

If I run something like;

ttest2(matrix 1,matrix 2 ,'Alpha',0.01)

The result displays 90 columns with a 1 for significant and 0 for Null is true but is it actually comparing col 1 with col 1 etc between the matrices ?

Anyone know this?

Answer 1

[Brendan Hamm]

You are correct. The columns of matrix1 are compared with the corresponding columns of matrix2. A value of 1 is indicative of a rejection of the Null in favor of the alternative hypothesis and a value of 0 is indicative of a failure to reject the null hypothesis. In this case the Null is that the corresponding columns are samples from normal distributions with equal means and equal (but unknown) variances.

[AndyT]

Many thanks Brendan , always helps to be sure.