sum(test == 0) On Thu, Jan 3, 2013 at 5:49 PM, Hermann Norpois <hnorp...@googlemail.com> wrote: > Hello, > > I wish to count how often zero (0) appears in the vector test. > > test > [1] 1 1 1 1 1 1 2 1 1 1 0 2 0 1 1 0 0 0 1 1 1 0 1 2 1 1 1 1 1 1 > > > I think of something like ... > >> sapply (test, function (x) if (x==0 ... > > ... but actually I dont know how to carry on. > > Could anybody give me a hint? > > Thanks Hermann >
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