Weighted Standard deviation?

Hey, I'm new to matlab, and cant seem to find a simple way to calculate weighted standarddeviations.

For the weighted mean, i can specify wmean(impactperkg, kgs) where the number of kg is the weighting. For the weighted median, the function "weightedMedian" can be used. Is there a similar function one can use for the std?

I'm confused to as if ts_std can be used for this purpose?

Cheers

Answer 1

[Tom Lane]

The "var" function will accept weights, and you can take the square root of the result.

Answer 2

[Hanna]

easy! thanks so much, i didnt even consider checking the var function :s