How to take an average of three dimensional data?

Hi,

I have a three-dimensional matrix (360 x 720 x 60), in this matrix 60 represents monthly data of 5yeras (for example monthly temperature). I want to take the annual average of these monthly values so that the final matrix will be 360 x 720 x 5.

Answer 1

[James Tursa]

x = your 3D matrix
result = mean(reshape(x,360,720,12,5),3);

[SONI SONI]

Hi James,

Thank you for the reply. I used this code but it is showing error (To RESHAPE the number of elements must not change) using reshape function.

[James Tursa]

What does this show:

size(your_matrix)

[SONI SONI]

x = 360 x 720 x 60;

result = mean(reshape(x,360,720,12,5),3);

it is showing error using reshape 'To RESHAPE the number of elements must not change'

[James Tursa]

I just ran the following test:

>> x = rand(360,720,60);
>> result = mean(reshape(x,360,720,12,5),3);

There is no error on my system. Please copy & paste the exact result of the following commands:

class(your_matrix)
size(your_matrix)

[SONI SONI]

yes, it is working.

Thanks James.

[elliot brooksbank]

Hi james

i have a similiar dataset but the matrix is (30x17x456) the 456 represents months i need the monthly average temperature for each month

[Walter Roberson]

mean(yourmatrix, [1 2])
%or
mean(reshape(yourmatrix, [], size(YourMatrix,3)))