| Matrix {Matrix} | R Documentation |
Construct a Matrix of class Matrix.
Matrix(data=NA, nrow=1, ncol=1, byrow=FALSE, dimnames=NULL)
data |
an optional numeric data vector or matrix. |
nrow |
the desired number of rows |
ncol |
the desired number of columns |
byrow |
logical. If FALSE
(the default) the matrix is filled by columns, otherwise the matrix is
filled by rows. |
dimnames |
A dimnames attribute for the matrix: a
list of length 2. |
If either of nrow or ncol is
not given, an attempt is made to infer it from the length of
data and the other parameter.
Although it is sometime possible to mix unclassed matrices (created
with matrix) with ones of class "Matrix", it is much
safer to always use carefully constructed ones of class
"Matrix".
Returns an nrow by ncol matrix of class "Matrix".
as.Matrix, Matrix.class, matrix.
Matrix(0, 3, 2) # a 3 by 2 matrix of zeros
Matrix(1:6, 3, 2) # a 3 by 2 matrix
Matrix(1:6, nrow=3)
Matrix(1:6, ncol=2)
Matrix(1:9, nrow=3, dimnames =list(c("a", "b", "c"), c("A", "B", "C")))