dMatrix-class {Matrix} | R Documentation |
The dMatrix
class is a virtual class contained by all actual
classes of numeric matrices in the Matrix package. Similarly,
all the actual classes of logical matrices inherit from the
lMatrix
class.
Common to all matrix object in the package:
Dim
:"integer"
- the dimensions
of the matrix - must be an integer vector with exactly two
non-negative values.Dimnames
:character
vector length
equal the corresponding Dim
element.
There are (relatively simple) group methods (see, e.g., Arith
)
signature(e1 = "dMatrix", e2 = "dMatrix")
: ... signature(e1 = "dMatrix", e2 = "numeric")
: ... signature(e1 = "numeric", e2 = "dMatrix")
: ... signature(x = "dMatrix")
: ... signature(x = "dMatrix", digits = "numeric")
:
this group contains round()
and signif()
.signature(e1 = "numeric", e2 = "dMatrix")
: ... signature(e1 = "dMatrix", e2 = "numeric")
: ... signature(e1 = "dMatrix", e2 = "dMatrix")
: ... signature(x = "dMatrix")
: The "Summary"
group contains the seven functions
max()
, min()
, range()
,
prod()
, sum()
,
any()
, and all()
.signature(from = "dMatrix", to = "matrix")
: ... signature(x = "dMatrix")
: computes the
“Matrix Exponential”, see expm
.signature(x = "dMatrix")
: ... signature(x = "lMatrix")
: as the base function
which(x, arr.ind)
returns the indices of the
TRUE
entries in x
; if arr.ind
is true,
as a 2-column matrix of row and column indices.
The nonzero-pattern matrix class nMatrix
, which
can be used to store non-NA
logical
matrices even more compactly.
The numeric matrix classes dgeMatrix
,
dgCMatrix
, and Matrix
.
showClass("dMatrix") set.seed(101) round(Matrix(rnorm(28), 4,7), 2) (M <- zapsmall(Matrix(rlnorm(56, sd=10), 4,14))) table(as.logical(M == 0))