[R] toJSON question

[Santosh Srinivas]

Hello,

I am trying to use RJSONIO

I have:
x <- c(0,4,8,9)
y <- c(3,8,5,13)
z <- cbind(x,y)

Any idea how to convert z into the JSON format below?

I want to get the following JSON output to put into a php file.
 [[0, 3], [4, 8], [8, 5], [9, 13]]

Thank you.