umx (version 1.4.0)

umxSetParameters: umxSetParameters

Description

Free or fix parameters in an mxModel. This allows similar actions that update enables for lm models. Updating can create duplicate labels, so this function also calls omxAssignFirstParameters to equate the start values for parameters which now have identical labels.

Usage

umxSetParameters(model, labels, free = NULL, values = NULL, newlabels = NULL, lbound = NULL, ubound = NULL, indep = FALSE, strict = TRUE, name = NULL, regex = FALSE, test = FALSE)

Arguments

model

an mxModel to WITH

labels

= labels to find

free

= new value for free

values

= new values

newlabels

= newlabels

lbound

= value for lbound

ubound

= value for ubound

indep

= whether to look in indep models

strict

whether to complain if labels not found

name

= new name for the returned model

regex

Is labels a regular expression (defaults to FALSE)

test

just show what you would do? (defaults to FALSE)

Value

- mxModel

Details

It also supports regular expressions to select labels. In this respect, it is similar to umxModify without running the model.

References

- https://github.com/tbates/umx, https://tbates.github.io

See Also

- umxModify, umxLabel

Other Modify or Compare Models: umxAdd1, umxDrop1, umxEquate, umxFixAll, umxGetParameters, umxMI, umxUnexplainedCausalNexus, umx

Examples

require(umx)
data(demoOneFactor)
latents  = c("G")
manifests = names(demoOneFactor)
m1 <- umxRAM("One Factor", data = mxData(demoOneFactor[1:80,], type = "raw"),
	umxPath(from = latents, to = manifests),
	umxPath(v.m. = manifests),
	umxPath(v1m0 = latents)
)
parameters(m1, free=TRUE)
m2 = umxSetParameters(m1, "G_to_x1", newlabels= "G_to_x2", test = FALSE)
m2 = umxSetParameters(m1, "^", newlabels= "m1_", regex = TRUE, test = TRUE)