Displaying 3 results from an estimated 3 matches for "4x10".
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0x10
2010 Jan 26
2
large integers in R
Has there been any update on R's handling large integers greater than 10^9 (between 10^9 and 4x10^9) ?
as.integer() in R 2.9.2 lists this as a restriction but doesnt list the actual limit or cause, nor if anyone was looking at fixing it.
Glenn D Blanford, PhD
<mailto:glenn.blanford@us.army.mil>
Scientific Research Corporation
gblanford@scires.com<mailto:gblanford@scires.com>
[[...
2011 Nov 20
1
Need help with table() and apply()
...- factor(df[,i], levels=1:4)
}
[Aside: why does the original df have columns of class "integer" when
the original data are factors? Why is it necessary to reconvert them
into factors? Also, is it possible to do this without a for loop?]
If I do this:
apply(df[,1:10], 1, table)
I get a 4x10 array, the contents of which I do not understand.
apply(df[,1:10], 2, table)
gives 10 tables for the columns, but it leaves out factor levels which
do not occur. For example,
rating.6 : 'table' int [1:3(1d)] 7 1 2
..- attr(*, "dimnames")=List of 1
.. ..$ : chr [1:3] "...
2004 Jul 13
12
Permutations
Dear R users,
I?m a beginner user of R and I?ve a problem with permutations that I don?t
know how to solve. I?ve 12 elements in blocks of 3 elements and I want only
to make permutations inter-blocks (no intra-blocks) (sorry if the
terminology is not accurate), something similar to:
1 2 3 | 4 5 6 | 7 8 9 | 10 11 12 ----------1st permutation
1 3 2 | 4 5 6 | 7 8 9 | 10 11 12 NO
- -
3 2 1