Nothing
suppressPackageStartupMessages(library(float))
x = matrix(1:30, 10)
y = matrix(1:10, 10, 2)
z = matrix(1:5, 5, 3)
xs = fl(x)
ys = fl(y)
zs = fl(z)
cpxy = crossprod(x, y)
tcpxz = tcrossprod(x, z)
test = dbl(crossprod(xs))
stopifnot(all.equal(test, crossprod(x)))
test = dbl(crossprod(xs, ys))
stopifnot(all.equal(test, cpxy))
test = crossprod(x, ys)
stopifnot(all.equal(test, cpxy))
test = crossprod(xs, y)
stopifnot(all.equal(test, cpxy))
test = dbl(tcrossprod(xs))
stopifnot(all.equal(test, tcrossprod(x)))
test = dbl(tcrossprod(xs, zs))
stopifnot(all.equal(test, tcpxz))
test = tcrossprod(x, zs)
stopifnot(all.equal(test, tcpxz))
test = tcrossprod(xs, z)
stopifnot(all.equal(test, tcpxz))
Any scripts or data that you put into this service are public.
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.