I want to collect the smallest arrays on the 3rd axis and get a 2d image.

i have a 3X3X3 double data

a=[1 1 1;10 10 10;10 10 10];
b=[20 20 20;2 2 2;20 20 20];
c=[30 30 30;30 30 30;3 3 3];
d=cat(3,a,b,c);

To illustrate, let's say 3X3X3 is row, column, page.

I want to find the minimum value several pages with fixed rows and columns.

I think repeating this would make one 3X3 matrix in each row and column.

I think it's possible if i use "for loops" to find it. But can't do this using "min()"?

% i want get e=[1 1 1 ;2 2 2; 3 3 3]
e=[1 1 1 ;2 2 2; 3 3 3]

e = 3×3

1 1 1 2 2 2 3 3 3

Answer 1

[Dyuman Joshi]

a=[1 1 1;10 10 10;10 10 10];
b=[20 20 20;2 2 2;20 20 20];
c=[30 30 30;30 30 30;3 3 3];
d=cat(3,a,b,c);

out=min(d,[],3)

out = 3×3

1 1 1 2 2 2 3 3 3

[영훈 정]

a=[1 1 1;10 10 10;10 10 10];
b=[20 20 20;2 2 2;20 20 20];
c=[30 30 30;30 30 30;3 3 3];
d=cat(3,a,b,c);
out=min(d,[],3)

out = 3×3

1 1 1 2 2 2 3 3 3

out=min(d,3)

out = 
out(:,:,1) =

     1     1     1
     3     3     3
     3     3     3


out(:,:,2) =

     3     3     3
     2     2     2
     3     3     3


out(:,:,3) =

     3     3     3
     3     3     3
     3     3     3

%I was stupid