multifield3logit: Multiple trilogit fields

In plot3logit: Ternary Plots for Trinomial Regression Models

Multiple trilogit fields

Description

Methods of S3 class multifield3logit handle multiple fields3logit objects simultaneously and permit new multifield3logit objects to be easily created by means of the sum operator "+".

Usage

multifield3logit(x, ...)

## S3 method for class 'Hfield3logit'
x + y

## S3 method for class 'multifield3logit'
print(x, maxitems = 10, ...)

## S3 method for class 'multifield3logit'
plot(x, y = NULL, add = FALSE, col = NA, legend = TRUE, ...)

## S3 method for class 'multifield3logit'
as_tibble(x, ..., wide = TRUE)

## S3 method for class 'multifield3logit'
as.data.frame(x, ..., wide = TRUE)

## S3 method for class 'multifield3logit'
fortify(model, data, ..., wide = TRUE)

## S3 method for class 'multifield3logit'
tidy(x, ..., wide = TRUE)

## S3 method for class 'multifield3logit'
labels(object, ...)

## S3 replacement method for class 'multifield3logit'
labels(object) <- value

## S3 method for class 'multifield3logit'
x[i, drop = TRUE]

## S3 replacement method for class 'multifield3logit'
x[i] <- value

Arguments

x, y, model, object	object of class field3logit or multifield3logit.
...	other arguments passed to or from other methods.
maxitems	maximum number of items to be enumerated when an object of class multifield3logit is printed.
add	logical argument which specifies whether the field should be added to an existing plot (add = TRUE) or a new ternary plot should be drawn (add = FALSE).
col, legend	graphical parameters if Ternary package is used.
wide	it allows to choose whether as.data.frame, as_tibble, fortify and tidy should return a data.frame or a tibble in wide (default) or long form.
data	not used. Argument included only for interface compatibility with the generic fortify.
value	value to be assigned.
i	index of the field3logit object to be selected.
drop	if TRUE, a field3logit object is returned if the subsetted multifield3logit object has length one.

Value

S3 object of class multifield3logit structured as a named list.

See Also

field3logit().

Examples

data(cross_1year)

mod0 <- nnet::multinom(employment_sit ~ ., data = cross_1year)
mod0

field_Sdur <- field3logit(mod0, 'durationShort',
  label = 'Short duration')
field_Hfgr <- field3logit(mod0, 'finalgradeHigh',
  label = 'High final grade')

gg3logit(field_Sdur + field_Hfgr) +
  stat_field3logit()
  facet_wrap(~ label)

refpoint <- list(c(0.7, 0.15, 0.15))

field_Sdur <- field3logit(mod0, 'durationShort',
  label = 'Short duration', p0 = refpoint, narrows = 1)
field_Ldur <- field3logit(mod0, 'durationLong',
  label = 'Long duration', p0 = refpoint, narrows = 1)
field_Hfgr <- field3logit(mod0, 'finalgradeHigh',
  label = 'High final grade', p0 = refpoint, narrows = 1)
field_Lfgr <- field3logit(mod0, 'finalgradeLow',
  label = 'Low final grade', p0 = refpoint, narrows = 1)

mfields <- field_Sdur + field_Ldur  + field_Lfgr + field_Hfgr
mfields

gg3logit(mfields) +
  stat_field3logit(aes(colour = label)) +
  theme_zoom_L(0.45)

plot3logit documentation built on Dec. 20, 2025, 1:07 a.m.