| Library: | glm |
| See also: | log xlnxdy |
| Quantlet: | xlny | |
| Description: | computes x.*log(y), with check for x=y=0, used for GLM. |
| Usage: | l = xlny(x,y) | |
| Input: | ||
| x | n x k matrix | |
| y | n x k matrix | |
| Output: | ||
| l | n x k matrix | |
library("glm")
x = 0|0|1|1|1
y = 0|0.5|1|0|0.5
xlny(x,y)
Contents of l [1,] 0 [2,] 0 [3,] 0 [4,] -Inf [5,] -0.69315