How to obtain a vector of indices using loop

Hi, I have a 10,000 row x 16 column x numFiles pages corresponding to time x heights x horizontal distances representing the measurements of mean speed Vmean speed in a 3D cell array.

If I want to get the maximum value index all I have to do is type: Vmax all=[V_max_all,I] = max(abs(V_mean(:))

where I is the linear index location that correspond to Vmax inside the total Vmean array.

Then in order to extract the subscripts for this Vmax inside the array I use:

[I_time, I_station, I_file] = ind2sub(size(V_mean),I)

On the other hand, I also have Venvelope = (Vmax1;Vmax2;Vmax3;...Vmmax16) where Venv is a 16 row x numfile column,

Therefore, I want to obtain a loop from which I can obtain a vector with the indices for each corresponding height

for i=1:16
  for j=1:numfiles
    [I_time, I_station, I_file] = ind2sub(size(V_mean(time, i,j)),I)
    ....

so I could obtain the vector [I_time, I_station, I_file] corresponding to each Vmax1;Vmax2,...)