Mean of an Array Containing some NAN Elements

Hello, I have two different arrays, A2 (96x96 doubles) and A3 (96x96x96 doubles), in both these arrays some elements inside are NAN.

I would like to compute the mean (single value for each array) of all the non-NAN values, how can I do it?

I tried with mean(A2) and mean(A3) but is not working

Answer 1

[KSSV]

Read the doc of mean, there is option of omitting nan.

A = [1 2 NaN 3 4 NaN] ;
mean(A,'omitnan')

ans = 2.5000

In older versions it is nanmean.

[Fabio Taccaliti]

Thanks, how can I do the mean of all the components, because right now is giving me a 1x96 array

[KSSV]

Again read the doc, you cn specify the dimension to calculate the mean.

Answer 2

[Vijeta Singh Yadav]

M = mean(___,nanflag)

This function will define whether to exclude or include NaN values from the computation of any previous syntaxes.

It has the following 2 types:

• Mean(X,’omitNaN’): It will omit all NaN values from the calculation
• Mean(X,’includeNaN’): It will add all the NaN values in the calculation.

Refer to Matlab Documentation for more information.