is there any way to set up a script to run a general amount of nested loops?

for example if i have a 3d array is there anyway to automatically loop through all pages and select 1 row from each page to create a new 2d array for each iteration, without having to manually specify how many nested loops i need? The number of pages of my 3d array changes throughout my project so would be handy to not have to specify

example of my array : val(:,:,1) =

     1     7
     2     8
     3     9
     4    10
     6     2
     7     3
     8     4
     9     5

val(:,:,2) =

     6    12
     7    13
     8    14
     9    15
    11     7
    12     8
    13     9
    14    10

val(:,:,3) =

    11    17
    12    18
    13    19
    14    20
    16    12
    17    13
    18    14
    19    15

val(:,:,4) =

    16    22
    17    23
    18    24
    19    25
    21    17
    22    18
    23    19
    24    20

val(:,:,5) =

    21    27
    22    28
    23    29
    24    30
    26    22
    27    23
    28    24
    29    25

val(:,:,6) =

    26    32
    27    33
    28    34
    29    35
    31    27
    32    28
    33    29
    34    30

Answer 1

[Ahmet Cecen]

Why not just do val(1,:,:) or val(i,:,:)?

[Thomas McLean]

i want to loop through all the possible combinations of rows. its for an optimisation problem so i test each possible combination of one row from each page. But the number of pages of the 3d array can change depending on what i input at the start of the script.

[Ahmet Cecen]

Ah. This maybe intractable for large number of "pages" but you can always do something like:

CombList = combnk(1:size(Val,1),size(Val,3));

Which will you give you every row combination possible.

Now you can do a single loop to go through all iterations independent of the number of rows or pages.

[Thomas McLean]

ah ok, i'll try that. Thankyou so much! :)