is.na-methods: is.na(), is.finite() Methods for 'Matrix' Objects

In Matrix: Sparse and Dense Matrix Classes and Methods

is.na(), is.finite() Methods for 'Matrix' Objects

Description

Methods for generic functions anyNA(), is.na(), is.nan(), is.infinite(), and is.finite(), for objects inheriting from virtual class Matrix or sparseVector.

Usage

## S4 method for signature 'denseMatrix'
is.na(x)
## S4 method for signature 'sparseMatrix'
is.na(x)
## S4 method for signature 'diagonalMatrix'
is.na(x)
## S4 method for signature 'indMatrix'
is.na(x)
## S4 method for signature 'sparseVector'
is.na(x)
## ...
## and likewise for anyNA, is.nan, is.infinite, is.finite

Arguments

x	an R object, here a sparse or dense matrix or vector.

Value

For is.*(), an nMatrix or nsparseVector matching the dimensions of x and specifying the positions in x of (some subset of) NA, NaN, Inf, and -Inf. For anyNA(), TRUE if x contains NA or NaN and FALSE otherwise.

See Also

NA, NaN, Inf

Examples

(M <- Matrix(1:6, nrow = 4, ncol = 3,
             dimnames = list(letters[1:4], LETTERS[1:3])))
stopifnot(!anyNA(M), !any(is.na(M)))

M[2:3, 2] <- NA
(inM <- is.na(M))
stopifnot(anyNA(M), sum(inM) == 2)

(A <- spMatrix(nrow = 10, ncol = 20,
               i = c(1, 3:8), j = c(2, 9, 6:10), x = 7 * (1:7)))
stopifnot(!anyNA(A), !any(is.na(A)))

A[2, 3] <- A[1, 2] <- A[5, 5:9] <- NA
(inA <- is.na(A))
stopifnot(anyNA(A), sum(inA) == 1 + 1 + 5)

Matrix documentation built on Oct. 19, 2024, 1:08 a.m.