converting 3D double matrix to char matrix

matrix_double_3D= 286 x 1 x 32

such as:

val(:,:,1) =

1
1
.
val(:,:,2) =
2
2

.

I need to convert this matrix to char matrix with adding prefix (G) to the numbers such as:

val(:,:,1) =
   G1
   G1
  val(:,:,2) =
   G2
   G2

I attached the original matrix_double_3D data. .

Answer 1

[DGM]

You can do this as a cell array of chars, or you can do it with an actual char array if you really must. Another option would be a string array, if that works for your needs.

S = load('matrix_double_3D.mat');
G = S.GPS_reference_PRN_double_original_epochs_3D;

% as a cell array
Gcl = num2cell(G);
Gcl = cellfun(@(x) sprintf('G%d',x),Gcl,'uniform',false);
Gcl(1:3,:,1:3) % show a sample

ans = 3×1×3 cell array
ans(:,:,1) = 

    {'G1'}
    {'G1'}
    {'G1'}


ans(:,:,2) = 

    {'G2'}
    {'G2'}
    {'G2'}


ans(:,:,3) = 

    {'G3'}
    {'G3'}
    {'G3'}

% as a fragile char array
% assumes absval of numbers are less than 100
Gch = permute(reshape(sprintf('G%02d',G),3,size(G,1),size(G,3)),[2 1 3]);
Gch(1:3,:,1:3) % show a sample

ans = 3×3×3 char array
ans(:,:,1) =

    'G01'
    'G01'
    'G01'

ans(:,:,2) =

    'G02'
    'G02'
    'G02'

ans(:,:,3) =

    'G03'
    'G03'
    'G03'

[sermet OGUTCU]

Thanks a lot