accessing double arrays in a multidimensional array

Hi I have an array which is 256x156x1056 double. (X,Y,Z [where the Z has it's own X,Y])

1) How do you access the double? - i've read the documentation but it's not so clear to me i've tried C(1,1,1) for instance and it gives me a single value - -but I want the double value - i've tried C(1,1,{1,1}} but it doesn't like that 2) I also want an average Z[x,y] over a cropped area of X,Y (i.e. 50x50x1056 double) -basically combine all that Z info into a single graph

any suggestions?

Answer 1

[James Tursa]

e.g.,

A = your 256x256x1056 array
B = mean(A,3);  % <-- average of A over the 3rd dimension
C = mean(A(1:50,1:50,:),3); % <--average of 50x50 corner of A over the 3rd dimension

[cgenes]

OK great thanks - i'll try that - - and what if I want to plot the Z[x,y], from 1 of the pixels e.g 100,100, plot(Z[x,y])?

[cgenes]

OK so in my array (output from cytospec) there is only 1 array of numbers in Z (the other array of numbers for the X values are held in a metafile - very confusing)