On Jan 5, 2005, at 12:59 pm, Prof Brian Ripley wrote:
table works the way it does because it applies to *factors*, so the names are the factor levels of the argument after conversion. So if anything is wasteful, that is.
How about using the guts of factor and table, via
xx <- unique(x) rbind(vals=xx, cnts=tabulate(match(x, xx)))
?
yes! this is just what I needed. For me, it's good for another reason too: this
method does not suffer if x contains a single enormous value (common
in my application).
I found this very instructive. Could we add this concatenation of tabulate() with match() to one or both manpages?
On Wed, 5 Jan 2005, Robin Hankin wrote:
Hi
How do I get the output from table() in matrix form?
If I have
R> table(c(1,1,1,1,2,20))
1 2 20 4 1 1
I want
[,1] [,2] [,3] [1,] 1 2 20 [2,] 4 1 1
-- Robin Hankin Uncertainty Analyst Southampton Oceanography Centre European Way, Southampton SO14 3ZH, UK tel 023-8059-7743
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