How to concatenate a 3D cell array along the 3rd dimension?

Dear experts, I am trying to convert CellArray1 into CellArray2, by concatenating CellArray1 along the third dimension. Any ideas on how to do that efficiently?

CellArray1 =

2×2×3 cell array

val(:,:,1) =

{180×1 double} {180×1 double}

{180×1 double} {180×1 double}

val(:,:,2) =

{180×1 double} {180×1 double}

{180×1 double} {180×1 double}

val(:,:,3) =

{180×1 double} {180×1 double}

{180×1 double} {180×1 double}

CellArray2 =

2×2 cell array

{540×1 double} {540×1 double}

{540×1 double} {540×1 double}

Thank you so much!

Answer 1

[Stephen23]

In one line using num2cell, cellfun, and vertcat:

>> C1 = cell(2,2,3); % preallocate cell array.
>> C1(:) = cellfun(@(~)rand(180,1),C1,'uni',0); % fake data.
>> C2 = cellfun(@(c)vertcat(c{:}),num2cell(C1,3),'uni',0);

And checking the first element of C2:

>> size(C2)
ans =
   2   2
>> size(C2{1})
ans =
   540     1
>> isequal(C2{1},vertcat(C1{1,1,:}))
ans = 1

[Raphael]

Works perfectly! Thanks!