[R] What does the "<<-" operator mean?
cliffclive at gmail.com
Thu Apr 21 21:08:37 CEST 2011
I've been reading some code from an example in a blog post (
http://www.maxdama.com/ here ) and I came across an operator that I hadn't
seen before. The author used a <<- operator to update a variable, like so:
ecov_xy <<- ecov_xy+decay*(x[t]*y[t]-ecov_xy)
At first I thought it was a mistake and tried replacing it with the usual <-
assignment operator, but I didn't get the same results. So what does the
double arrow <<- operator do?
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