is.parallel.RdReturns a logical vector from a test of whether an object such as a matrix or VGLM object corresponds to a parallelism assumption.
is.parallel.matrix(object, ...)
is.parallel.vglm(object, type = c("term", "lm"), ...)an object such as a constraint matrix or
a vglm object.
passed into constraints.
additional optional arguments. Currently unused.
These functions may be useful for categorical models
such as
propodds,
cumulative,
acat,
cratio,
sratio,
multinomial.
A vector of logicals, testing whether each constraint matrix is a one-column matrix of ones. Note that parallelism can still be thought of as holding if the constraint matrix has a non-zero but constant values, however, this is currently not implemented. No checking is done that the constraint matrices have the same number of rows.
if (FALSE) require("VGAMdata")
fit <- vglm(educ ~ sm.bs(age) * sex + ethnicity,
cumulative(parallel = TRUE), head(xs.nz, 200))
#> Error in eval(mf, parent.frame()): object 'xs.nz' not found
is.parallel(fit)
#> Error in h(simpleError(msg, call)): error in evaluating the argument 'object' in selecting a method for function 'is.parallel': object 'fit' not found
is.parallel(fit, type = "lm") # For each column of the LM matrix
#> Error in h(simpleError(msg, call)): error in evaluating the argument 'object' in selecting a method for function 'is.parallel': object 'fit' not found
# \dontrun{}