Access/calculate Matrices within a Cell Array

I have a 51x13 cell array which contains 1x1 struct arrays and therein are many different matrices.

I want to calculate the mean of selected matrices of certain rows and columns in that cell array and save the results in one matrices.

My approach : Allmean= [mean(P{9:51,1}.selectedMatrice)]

with the Error form Matlab : "Expected one output from a curly brace or dot indexing expression, but there were 43 results"

Wich possibilitys there are? (maybe for loop?) How can I do that ?

Answer 1

[Jan]

The desctiption of the data as text is less clear than posting some code, which produces example data.

With some guessing:

Allmean= mean([P{9:51,1}.selectedMatrice])

But I'm afraid this does not change the problem. Your data representation is extremely unuseful to perform calculations. Would it be possible to create a struct array instead of the cell array containing structs?