Description Usage Arguments Author(s) See Also Examples
Functions for extracting slices of arrays
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tab |
An array with named dimnames. |
slice |
A list defining the slice. |
margin |
Names of variables in slice. |
drop |
If TRUE then dimensions with only one level will be dropped from the output. |
as.array |
If the resulting array is one-dimensional the result will by default be a vector with no dim attribute unless as.array is TRUE. |
val |
The values that entries in the slice will be multiplied with. |
comp |
The values that entries NOT in the slice will be multiplied with. |
complement |
If TRUE the complement of the entries are returned. |
S<c3><b8>ren H<c3><b8>jsgaard, [email protected]
ar_perm
, ar_marg
, ar_mult
,
ar_div
, ar_add
, ar_subt
, ar_sum
,
ar_prod
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | x = HairEyeColor
s = list(Hair=c("Black","Brown"), Eye=c("Brown", "Blue"))
## arslice
s1 = ar_slice(x, slice=s)
s1
## ar_slice_entries
ar_slice_entries(x, slice=s)
ar_slice_entries(x, slice=s, complement=TRUE)
## ar_slice_mult
s2 = ar_slice_mult(x, slice=s)
s2
## arslice_prim does the same as arslice - faster, but the function is less
# flexible
sp = list(c(1,2), c(1,2), TRUE)
ar_slice_prim(x, slice=sp)
ar_slice(x, slice=s)
if ( require(microbenchmark) ){
microbenchmark(ar_slice_prim(x, slice=sp), ar_slice(x, slice=s))
}
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