Displaying 3 results from an estimated 3 matches for "negliglible".
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negligible
2006 Apr 14
1
row.names in data.frame
...ger representation.
This would appear to be completely back-compatible for those who only work
via the accessor functions, and probably work with almost all package code
that manipulates attributes directly. Since the changes can be done
almost entirely in C code, the performance hit should be negliglible.
The benefits will probably only be appreciable with `tall and skinny'
data frames, as even 72 bytes per row is only going to buy you 9 numeric
columns. But that is it seems a common enough case to make this
worthwhile.
This would be a change aimed at 2.4.0, since we would need plenty of t...
2001 Aug 04
1
replacing elements in matrix: fastest method?
Hi!
I replace some elements of a matrix a
> a
[,1] [,2] [,3]
[1,] 1 2 3
[2,] 4 5 6
[3,] 7 8 9
[4,] 10 11 12
according to a reclassification matrix such
> pares
[,1] [,2]
[1,] 1 2
[2,] 5 6
[3,] 8 7
to get
> b
[,1] [,2] [,3]
[1,] 1 2 3
[2,] 4 5 6
[3,] 7 8 9
[4,] 10 11 12
As both a and
1999 Jan 02
3
.C
Happy 1999!
I've been celebrating the holidays by (finally) getting to the port of our
S+ NetCDF routines to R, which I'm trying to make into a library. At the
moment, there are two issues I'd appreciate advice on:
1. Is support for mode "single" data planned anytime soon in R? A lot of
our NetCDF files contain "single" data and having to coerce into