Extract Subset of Function Array
Extract a subset of a function array (an object of class
"fasp").
## S3 method for class 'fasp' x[I, J, drop=TRUE,...]
x |
A function array. An object of class |
I |
any valid expression for a subset of the row indices of the array. |
J |
any valid expression for a subset of the column indices of the array. |
drop |
Logical.
When the selected subset consists of only one cell of the array,
if |
... |
Ignored. |
A function array can be regarded as a matrix whose entries
are functions. See fasp.object for an explanation of
function arrays.
This routine extracts a sub-array according to the usual conventions for matrix indexing.
A function array (of class "fasp").
Exceptionally, if the array has only one cell, and
if drop=TRUE, then the result is a function value table
(class "fv").
Adrian Baddeley Adrian.Baddeley@curtin.edu.au, Rolf Turner r.turner@auckland.ac.nz and Ege Rubak rubak@math.aau.dk
# Lansing woods data - multitype points with 6 types
a <- alltypes(lansing, 'K')
# extract first three marks only
b <- a[1:3,1:3]
if(interactive()) {plot(b)}
# subset of array pertaining to hickories
h <- a["hickory", ]
if(interactive()) {plot(h)}Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.