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Well, you won't like this, but it is kind of wimpily (is that a word?) documented: If you check the code of factor(), you will see that nmax appears as an argument in a call to unique(). ?unique says for nmax, "... see duplicated" . And ?duplicated says: "If nmax is set too small there is liable to be an error: nmax = 1 is silently i...

I have been trying to understand how the argument 'nmax' works in 'factor' function. R-Documentation states - "Since factors typically have quite a small number of levels, for large vectors x it is helpful to supply nmax as an upper bound on the number of unique values." In the code below what is the reason for error when value of nmax is 24. Why did the same error not

...an open mind is that people keep coming along and sticking things into it." -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip ) On Sat, Jun 3, 2017 at 9:11 PM, Bert Gunter <bgunter.4567 at gmail.com> wrote: > Well, you won't like this, but it is kind of wimpily (is that a word?) > documented: > > If you check the code of factor(), you will see that nmax appears as > an argument in a call to unique(). ?unique says for nmax, "... see > duplicated" . And ?duplicated says: > > "If nmax is set too small there is liable to be...