element-by-element comparison

Hi,

I have a vector and a matrix. For example,

A = [
12
3
4];

B = [
4       13
10      2
4       8];

I am comparing A to each column of B using A>B[,ii], so the expected result
is

C = [
1    0
0    1
0    0];

I am looking for a way to do this quickly instead of going through the for
loop, but haven't had any luck yet? Any advice is appreciated.

Hi Wendy,
You probably mean something like this:

apply(B,2,`<`,A)

which means roughly
"To each column of B, apply the function `<` using A as the comparison 
values"

You will get a matrix of TRUE/FALSE values that are pretty much 
equivalent to your 0/1 values. Note that there are quite a few '*apply' 
functions and 'apply' is only guaranteed to work on arrays and matrices.

Jim