Displaying 1 result from an estimated 1 matches for "sparsetab".
Did you mean:
sparsemat
2008 Feb 06
3
counting row repetitions without loop
Hi,
I have a data frame consisting of coordinates on a 10*10 grid, i.e.
> example
x y
1 4 5
2 6 7
3 6 6
4 7 5
5 5 7
6 6 7
7 4 5
8 6 7
9 7 6
10 5 6
What I would like to do is return an 10*10 matrix consisting of counts
at each position, so in the above example I would have a matrix where,
for example, cell [4,5] contains 2 and [6,7] contains 3. At the