Annually averaging of a 4D matrix

Hello,

I have a 4D data set (e.g. lon : lat : height : month) that I need to annually average. Usually with a 3D data set (e.g. lon : lat : month) I would use-

 s=size(A);
B = squeeze(nanmean(reshape(A,[s(1:2),12,s(3)/12]),3)); 

For a 4D data set I have tried-

 s=size(A);
B = squeeze(nanmean(reshape(A,[s(1:2:3),12,s(4)/12]),4)); 

I am guessing that I need to put something else in the square bracket or I am changing something wrong, but after trying various alterations I have decdied to ask the community.

Thank you.

Answer 1

[Rik]

You are using the color operator incorrectly. 1:2:3 doesn't mean [1 2 3], but [1 3].

If your syntax does indeed work for you, the edit below should be what you're looking for.

s=size(A);
B = squeeze(nanmean(reshape(A,[s(1:3),12,s(4)/12]),4));

[HA]

Aha, of course it does! Thank you, I can see how that is a silly mistake now!