1) Usage
Very handy function to modify the attributes of matrix cells in a model.
omxSetParameters(model, labels, free = NULL, values = NULL, newlabels = NULL, lbound = NULL, ubound = NULL, indep = FALSE)
2) Arguments
model - a MxModel object.
labels - a character vector of target parameter names.
free - a boolean vector of parameter free/fixed designations.
values - a numeric vector of parameter values.
newlabels - a character vector of new parameter names.
lbound - a numeric vector of lower bound values.
ubound - a numeric vector of upper bound values.
indep - boolean. set parameters in independent submodels.
3) Examples
A <- mxMatrix('Full', nrow=3, ncol=3, labels = c('a','b', NA), free = TRUE, name = 'A')
# labels for row 1 and 2, row 3 left unalabelled
model <- mxModel(A, name = 'model')
model@matrices$A@labels
[,1] [,2] [,3]
[1,] "a" "a" "a"
[2,] "b" "b" "b"
[3,] NA NA NA
model <- omxSetParameters(model, c('a', 'b'), values = c(1, 2)) # set value of cells labelled "a" and "b" to 1 and 2 respectively
model <- omxSetParameters(model, c('a', 'b'), newlabels = c('b', 'a')) # set label of cell labelled "a" to "b" and vice versa
# See the results...
model@matrices$A
@labels
[,1] [,2] [,3]
[1,] "b" "b" "b"
[2,] "a" "a" "a"
[3,] NA NA NA
@values
[,1] [,2] [,3]
[1,] 1 1 1
[2,] 2 2 2
[3,] 0 0 0
4) Gotchas
This function cannot modify parameters that have NA labels (i,e, label your matrix cells if you want to use this to set and drop parameters.
5) See Also
omxGetParameters,
omxAssignFirstParameters
mxRename
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