Displaying 1 result from an estimated 1 matches for "makeyourmatrix".
2010 Nov 17
3
translate vector of numbers to indicies of 0/1 matrix
Hello All,
Searched around, haven't found a decent solution.
I'd like to translate a vector of numbers to a matrix (or to a list of
vectors) such that the vector values would serve as indicies of the 1's
in an otherwise-zero-filled matrix (or list of vectors). For example:
> a = c(1,3,3,4)
# perform operation
[,1] [,2] [,3] [,4]
[1,] 1 0 0 0
[2,] 0 0 1