Why do I receive an error when I use the STD function in MATLAB 7.0 (R14)?

I use the STD function to evaluate the standard deviation of my data, using the following code:

X=[4 -2 1 9 5 7];

std(X,2)

which generates the following error:

 ??? Error using ==> var

 W must be a vector of nonnegative weights, or a scalar 0 or 1.

 Error in ==> std at 32

 y = sqrt(var(varargin{:}));

Answer 1

[MathWorks Support Team]

The STD function has been changed between MATLAB 6.5.1 (R13SP1) and MATLAB 7.0 (R14).

In MATLAB 7.0 (R14), the second input argument ("flag") must be either 0 or 1 as stated in the documentation. To view the documentation for the STD function, use the following command:

doc std