mean edit page

calculates the mean value for an univariate S2Fun or calculates the mean along a specified dimension fo a multimodal S2Fun

## Description

If sF is a 3x3 S2Fun then mean(sF) returns a 3x3 matrix with the mean values of each function mean(sF, 1) returns a 1x3 S2Fun wich contains the pointwise means values along the first dimension

## Input

 sF S2FunHarmonic d dimension to take the mean value over

## Output

 sF S2FunHarmonic value double