binary: Defines variables as binary
Description
Defines variables of a latent variable model (lvm-object from
the lava package) as binary.Usage
## S3 method for class 'lvm':
binary(x, var=NULL, ...)
## S3 method for class 'lvm':
binary(x, ...) <- value
Arguments
var
Formula or vector of variable names
value
Formula or vector of variable names
...
Additional arguments parsed to lower-level functions
Value
lvm-object (or vector of variable names if called without any arguments)
Details
This function sets the status of variables to 'binary'. For use with
the estimate method a probit-link will be assumed. Used with
the sim method normal distributed data will be simulated
followed by thresholding at 0. To simulate data where the dichotomous
variable has a direct effect on the outcome the distribution
method can be used, e.g. distribution(m,~x) <- binomial.lvm("probit").