ttest2 negative value

Hi all,

having two vectors x and y, I would like to test which one has the smallest mean with ttest2. I saw in an paper describing rapidly the ttest2 function that it could return either 1 (if mean(x) > meay(y)) or 0 (if mean(x)==mean(y)) or -1 (if mean(x)<mean(y)). However, in the official documentation, there is no negative which can be returned .

Are the information I got false ? How can obtained the described return results ? (1 or 0 or -1).

Many thanks

Answer 1

[Star Strider]

It would help to know what MATLAB version (release) you are using. I am not aware that option ever existed.

If you want to specifically test that the first mean is different from, greater than, or less than the second mean, use the 'Tail' (link) name-value pair argument.

[Anass John]

Thanks for your repsonse. I'm using the R2018b version. I think as you said, maybe this option doesn't exist anymore. Thank you for the confirmation

[Star Strider]

My pleasure.