R table by matrix row

Question

For a matrix (as.matrix), how can I generate a table where rows are equal to rows of the matrix?

>table(matrix)

and

&g         


        

Answer 1

I used apply too:

t(apply(mat, 1, function(x) table(factor(x, levels = unique(sort(c(mat)))))))

R > mat  = matrix(sample(1:8, 20, replace = T), 5, 4)
R > mat
     [,1] [,2] [,3] [,4]
[1,]    5    6    1    4
[2,]    4    3    4    8
[3,]    4    8    4    3
[4,]    3    3    5    1
[5,]    1    1    3    1
R > t(apply(mat, 1, function(x) table(factor(x, levels = unique(sort(c(mat)))))))
     1 3 4 5 6 8
[1,] 1 0 1 1 1 0
[2,] 0 1 2 0 0 1
[3,] 0 1 2 0 0 1
[4,] 1 2 0 1 0 0
[5,] 3 1 0 0 0 0