MATLAB: Fast calculation of min for a cell array

Question

Hi, I have this cell array:

A =
  3×160 cell array
  Columns 1 through 5
    {18×10754 double}    {18×10754 double}    {18×10754 double}    {18×10754 double}    {18×10754 double}
    {31×14797 double}    {31×14797 double}    {31×14797 double}    {31×14797 double}    {31×14797 double}
    {65×34310 double}    {65×34310 double}    {65×34310 double}    {65×34310 double}    {65×34310 double}

and for each of my 160 cells in A(3,:) (i.e. the 160 cells in the third row of A):

A(3,:) =
  1×160 cell array
  Columns 1 through 5
    {65×34310 double}    {65×34310 double}    {65×34310 double}    {65×34310 double}    {65×34310 double}

I would need a very fast way to get the min of each column, and therefore such a cell array:

Amin =
  1×160 cell array
  Columns 1 through 5
    {1×34310 double}    {1×34310 double}    {1×34310 double}    {1×34310 double}    {1×34310 double}

My attempt is the following:

t1 = tic();
for i = 1 : size(A(3,:),2) 
    [A_min_value, A_min_row] = min(A{3,i,:},[],1); % (min each column)
    Amin_value{3,i,:} = A_min_value;
    Amin_row{3,i,:} = A_min_row;    
end
dt = toc(t1)

tic-toc time

dt = 0.129487033

Any faster way?

Answer 1

nc = size(A,2);
Amin_value = cell(1,nc);
Amin_row   = cell(1,nc);
for k = 1:nc
    [Amin_value{1,k},Amin_row{1,k}] = min(A{3,k},[],1);    
end