min max of a list of vectors

I have 4 variables A B C D which are all a list of 20 random numbers

 A = <1x20 double>
 B = <1x20 double>
 C = <1x20 double>
 D = <1x20 double>

I'm trying to have min(A/C, A/D, B/C, B/D)

to get something like

 E = <1x20 double>

which outputs the minimum of each operation at corresponding iterations

I've tried:

 H = [A./D,A./E,B./C,B./D];
 I = min(H);

gives me a dimension error

any other thoughts? thank you

[Walter Roberson]

Duplicates http://uk.mathworks.com/matlabcentral/answers/225442-min-and-max-of-a-vector