MATLAB Answers

Matlab
0

P-value using ranksum function

Asked by Matlab
on 23 Jul 2017
Latest activity Commented on by Star Strider
on 24 Jul 2017
I want to use ranksum function to the following data in A1 but p value appear NAN why?

  0 Comments

Sign in to comment.

Tags

1 Answer

Answer by Star Strider
on 23 Jul 2017

All your values in the ‘A1.xls’ file are zero.
That will be a problem for ranksum.
D = xlsread('Matlab A1.xls');
Dmin = min(D)
Dmax = max(D)
Dinf = D(~isfinite(D))
Dmin =
0 0 0 0 0 0
Dmax =
0 0 0 0 0 0
Dinf =
0×1 empty double column vector

  2 Comments

Matlab
on 24 Jul 2017
What do you mean that is a problem in ranksum ? And how can I solve this problem? All values equal to zero so p value must be 1.
Star Strider
on 24 Jul 2017
Please read the documentation on the ranksum function, and consult a statistics textbook on the Wilcoxon rank sum test.

Sign in to comment.