as.mxAlgebra | R Documentation |
It converts a character matrix into MxAlgebra
object.
as.mxAlgebra(x, startvalues=NULL, lbound=NULL, ubound=NULL, name="X")
x |
A character or numeric matrix, which consists of valid
operators in |
startvalues |
A list of starting values of the free parameters. If it is not provided, all free parameters are assumed 0. |
lbound |
A list of lower bound of the free parameters. If it is
not provided, all free parameters are assumed |
ubound |
A list of upper bound of the free parameters. If it is
not provided, all free parameters are assumed |
name |
A character string of the names of the objects based on. |
Suppose the name argument is "X", the output is a list of the following elements.
mxalgebra |
An |
parameters |
A column vector |
list |
A list of mxMatrix to form the |
Mike W.-L. Cheung <mikewlcheung@nus.edu.sg>
as.mxMatrix
, mxAlgebra
## a, b, and c are free parameters
(A1 <- matrix(c(1, "a*b", "a^b", "exp(c)"), ncol=2, nrow=2))
## [,1] [,2]
## [1,] "1" "a^b"
## [2,] "a*b" "exp(c)"
A <- as.mxAlgebra(A1, startvalues=list(a=1, b=2),
lbound=list(a=0), ubound=list(b=1, c=2),
name="A")
## An object of mxAlgebra
A$mxalgebra
## mxAlgebra 'A'
## $formula: rbind(cbind(A1_1, A1_2), cbind(A2_1, A2_2))
## $result: (not yet computed) <0 x 0 matrix>
## dimnames: NULL
## A matrix of parameters
A$parameters
## FullMatrix 'Avars'
## $labels
## [,1]
## [1,] "a"
## [2,] "b"
## [3,] "c"
## $values
## [,1]
## [1,] 1
## [2,] 2
## [3,] 0
## $free
## [,1]
## [1,] TRUE
## [2,] TRUE
## [3,] TRUE
## $lbound
## [,1]
## [1,] 0
## [2,] NA
## [3,] NA
## $ubound
## [,1]
## [1,] NA
## [2,] 1
## [3,] 2
## A list of matrices of elements for the mxAlgebra
A$list
## $A1_1
## mxAlgebra 'A1_1'
## $formula: 1
## $result: (not yet computed) <0 x 0 matrix>
## dimnames: NULL
## $A2_1
## mxAlgebra 'A2_1'
## $formula: a * b
## $result: (not yet computed) <0 x 0 matrix>
## dimnames: NULL
## $A1_2
## mxAlgebra 'A1_2'
## $formula: a^b
## $result: (not yet computed) <0 x 0 matrix>
## dimnames: NULL
## $A2_2
## mxAlgebra 'A2_2'
## $formula: exp(c)
## $result: (not yet computed) <0 x 0 matrix>
## dimnames: NULL
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