
is.na()
, is.finite()
,
and is.infinite()
for all Matrices (objects
extending the Matrix
class):[object Object],[object Object]
## S3 method for class 'sparseMatrix':
is.na(x)
## S3 method for class 'dsparseMatrix':
is.finite(x)
## S3 method for class 'ddenseMatrix':
is.infinite(x)
## ...
## and for other classes
NA
, is.na
;
is.finite
, is.infinite
;
nMatrix
,
denseMatrix
, sparseMatrix
. These methods are also defined for
objects.
M <- Matrix(1:6, nrow=4, ncol=3,
dimnames = list(c("a", "b", "c", "d"), c("A", "B", "C")))
stopifnot(all(!is.na(M)))
M[2:3,2] <- NA
is.na(M)
A <- spMatrix(10,20, i = c(1,3:8),
j = c(2,9,6:10),
x = 7 * (1:7))
stopifnot(all(!is.na(A)))
A[2,3] <- A[1,2] <- A[5, 5:9] <- NA
inA <- is.na(A)
stopifnot(sum(inA) == 1+1+5)
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