list to matrix?

How do I convert a list to a matrix?

--8<---------------cut here---------------start------------->8---
list(c(50000, 101), c(1e+05, 46), c(150000, 31), c(2e+05, 17),
    c(250000, 19), c(3e+05, 11), c(350000, 12), c(4e+05, 25),
    c(450000, 19), c(5e+05, 16))

do.call(rbind, LIST)

or

do.call(cbind, LIST)

depending on your desired direction. The do.call syntax takes a
function name and uses a list as arguments to that function, returning
the result. Super useful for these situations where you collect things
and something like

cbind(x[[1]],x[[2]], x[[3]]...)

isn't feasible or possible.

MW