R-alpha: R-beta:matrix & vector multiplication.

[Thomas Lumley]

Both of these used to work and seem useful and harmless:

R> matrix(1,ncol=1)%*%c(1,2)
Error in matrix(1, ncol = 1) %*% c(1, 2) : non-conformable arguments

R> matrix(1,ncol=1)*(1:2)
Error: dim<- length of dims do not match the length of object


Thomas Lumley
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