std function error "Subscript indices must either be real positive integers or logicals."

Pardon my stupidity but I really dont understand why matlab refuses to compute the standard deviation.

I checked the data: 355 X 1 double (no NaN inside or whatever). I can compute the mean, sum, median, of this exact same data but I receive an error when I want to do the std ...

I tried the following: A=[1 2 3 1 2 3]';

B=std(A) New error: Index exceeds matrix dimensions.

But if I do it on a brand new script, it works !!

Can anyone tell my what the hell is happening there ?

Thank you so much in advance !

Answer 1

[Chandani Madnani]

I tried to reproduce the scenario by executing the below commands:

>> A=[1 2 3 1 2 3]';

>> B=std(A)

But I get a response:

B =

    0.8944

Which version of MATLAB are you using and on which platform ? Is A initialized to something else in between the two commands ?

[Pierre Lonfat]

I actually found the answer and it is really stupid unfortunately. Never name a variable std (which is used to call the function for the standard deviation). Then everything is right again! Thank you for your answer !