Nothing
rotation <- function (form,center,angle)
{
npoints<-length(form[,1])
for (i in 1:npoints)
{
form[i,]<-form[i,]-center
}
matrot<-matrix(c(cos(angle),sin(angle),-sin(angle),cos(angle)),2,2)
rotated<-matrot %*% t(form) + cbind(center,center)
rotated<-data.matrix(t(rotated))
row.names(rotated)<-NULL
rotated
}
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