as.mxMatrix: Convert a Matrix into MxMatrix-class

In metaSEM: Meta-Analysis using Structural Equation Modeling

Convert a Matrix into MxMatrix-class

Description

It converts a matrix into MxMatrix-class via mxMatrix.

Usage

as.mxMatrix(x, name, ...)

Arguments

x	A character or numeric matrix. If x is not a matrix, as.matrix(x) is applied first.
name	An optional character string as the name of the MxMatrix object created by mxModel function. If the name is missing, the name of x will be used.
...	Further arguments to be passed to mxMatrix. It should be noted that type, nrow, ncol, values, free, name and labels will be created automatically. Thus, these arguments except labels should be avoided in ...

Details

If there are non-numeric values in x, they are treated as the labels of the parameters. If a "*" is present, the numeric value on the left-hand side will be treated as the starting value for a free parameter. If an "@" is present, the numeric value on the left-hand side will be considered as the value for a fixed parameter. If it is a matrix of numeric values, there are no free parameters in the output matrix.

Value

A MxMatrix-class object with the same dimensions as x

Author(s)

Mike W.-L. Cheung <[e-mail]>

See Also

mxMatrix, create.mxMatrix, create.Fmatrix, checkRAM, lavaan2RAM, as.symMatrix

Examples

## a and b are free parameters with starting values and labels
(a1 <- matrix(c(1:4, "5*a", 6, "7*b", 8, 9), ncol=3, nrow=3))
#      [,1] [,2]  [,3] 
# [1,] "1"  "4"   "7*b"
# [2,] "2"  "5*a" "8"  
# [3,] "3"  "6"   "9"  

a1 <- as.mxMatrix(a1)

## a and b are fixed parameters without any labels, name="new2"
(a2 <- matrix(1:9, ncol=3, nrow=3))
#      [,1] [,2] [,3]
# [1,]    1    4    7
# [2,]    2    5    8
# [3,]    3    6    9

new2 <- as.mxMatrix(a2, name="new2")

## Free parameters without starting values
(a3 <- matrix(c(1:4, "*a", 6, "*b", 8, 9), ncol=3, nrow=3))
#      [,1] [,2] [,3]
# [1,] "1"  "4"  "*b"
# [2,] "2"  "*a" "8" 
# [3,] "3"  "6"  "9" 

a3 <- as.mxMatrix(a3, lbound=0)

## A free parameter without label
(a4 <- matrix(c(1:4, "5*", 6, "7*b", 8, 9), ncol=3, nrow=3))
#      [,1] [,2] [,3] 
# [1,] "1"  "4"  "7*b"
# [2,] "2"  "5*" "8"  
# [3,] "3"  "6"  "9"  

a4 <- as.mxMatrix(a4)

## Convert a scalar into mxMatrix object
## "name" is required as "3*a" is not a valid name.
(a5 <- as.mxMatrix("3*a", name="a5"))

## Free and fixed parameters
(a6 <- matrix(c(1, "2*a", "3@b", 4), ncol=2, nrow=2))

as.mxMatrix(a6)

metaSEM documentation built on Sept. 30, 2024, 9:21 a.m.