Is the following sample mean and variance fully vectorised?

I wish to calculate the sample mean and the variance. The following is an attempt:

mu=sum(X)/m;
sigma2=sum((X-mu).^2)/m;
mu=mu.';
sigma2=sigma2.';

Is the above fully vectorised as I haven't used any loops (I'm new to this sort of vectorised implementation, so I'm not sure if this code above is fully vectorised or not)?

Any help is highly appreciated.

Answer 1

[madhan ravi]

MATLAB already has inbuilt functions named mean() and var() .

[Adarsh Kumar]

Yes. But I'm suppose to implement it myself. Also I suppose, if my code is fully vectorised, then Matlab may be doing the same at the backend?

[madhan ravi]

The best what you can is you can compare the speed with your code and Matlab’s inbuilt function using tic toc . Looks to me that your code is already vectorised.

[Adarsh Kumar]

Thanks Madhan.