Dear all,
I was playing around with factor contrasts, and found the argument nmax on function factor.  When using nmax=1, R froze completely, and I had to close it from task manager. After some debugging, I found that the problem is actually in unique-function, where the internal unique function is called:

.Internal(unique(x, incomparables, fromLast, nmax))

More generally, it looks like unique(x,nmax=k) freezes R the length of x is larger than 2 and k=1, and when nmax<length(x)-1 you get error "Error in unique.default(1:5, nmax = 3) : hash table is full".

Of course using nmax=1 doesn't make much sense, but maybe some check would be in place before calling internal unique?

Best regards,

Jouni Helske


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