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Plot grouped proportional tables

Source: R/plot_gpt.R
plot_gpt.Rd

Plot grouped proportional crosstables, where the proportion of each level of x for the highest category in y is plotted, for each subgroup of grp.

Usage

plot_gpt(
  data,
  x,
  y,
  grp,
  colors = "metro",
  geom.size = 2.5,
  shape.fill.color = "#f0f0f0",
  shapes = c(15, 16, 17, 18, 21, 22, 23, 24, 25, 7, 8, 9, 10, 12),
  title = NULL,
  axis.labels = NULL,
  axis.titles = NULL,
  legend.title = NULL,
  legend.labels = NULL,
  wrap.title = 50,
  wrap.labels = 15,
  wrap.legend.title = 20,
  wrap.legend.labels = 20,
  axis.lim = NULL,
  grid.breaks = NULL,
  show.total = TRUE,
  annotate.total = TRUE,
  show.p = TRUE,
  show.n = TRUE
)

Arguments

data

A data frame, or a grouped data frame.

x

Categorical variable, where the proportion of each category in x for the highest category of y will be printed along the x-axis.

y

Categorical or numeric variable. If not a binary variable, y will be recoded into a binary variable, dichtomized at the highest category and all remaining categories.

grp

Grouping variable, which will define the y-axis

colors

May be a character vector of color values in hex-format, valid color value names (see demo("colors")) or a name of a pre-defined color palette. Following options are valid for the colors argument:

  • If not specified, a default color brewer palette will be used, which is suitable for the plot style.

  • If "gs", a greyscale will be used.

  • If "bw", and plot-type is a line-plot, the plot is black/white and uses different line types to distinguish groups (see this package-vignette).

  • If colors is any valid color brewer palette name, the related palette will be used. Use RColorBrewer::display.brewer.all() to view all available palette names.

  • There are some pre-defined color palettes in this package, see sjPlot-themes for details.

  • Else specify own color values or names as vector (e.g. colors = "#00ff00" or colors = c("firebrick", "blue")).

geom.size

size resp. width of the geoms (bar width, line thickness or point size, depending on plot type and function). Note that bar and bin widths mostly need smaller values than dot sizes.

shape.fill.color

Optional color vector, fill-color for non-filled shapes

shapes

Numeric vector with shape styles, used to map the different categories of x.

title

Character vector, used as plot title. By default, response_labels is called to retrieve the label of the dependent variable, which will be used as title. Use title = "" to remove title.

axis.labels

character vector with labels used as axis labels. Optional argument, since in most cases, axis labels are set automatically.

axis.titles

character vector of length one or two, defining the title(s) for the x-axis and y-axis.

legend.title

Character vector, used as legend title for plots that have a legend.

legend.labels

character vector with labels for the guide/legend.

wrap.title

Numeric, determines how many chars of the plot title are displayed in one line and when a line break is inserted.

wrap.labels

numeric, determines how many chars of the value, variable or axis labels are displayed in one line and when a line break is inserted.

wrap.legend.title

numeric, determines how many chars of the legend's title are displayed in one line and when a line break is inserted.

wrap.legend.labels

numeric, determines how many chars of the legend labels are displayed in one line and when a line break is inserted.

axis.lim

Numeric vector of length 2, defining the range of the plot axis. Depending on plot type, may effect either x- or y-axis, or both. For multiple plot outputs (e.g., from type = "eff" or type = "slope" in plot_model), axis.lim may also be a list of vectors of length 2, defining axis limits for each plot (only if non-faceted).

grid.breaks

numeric; sets the distance between breaks for the axis, i.e. at every grid.breaks'th position a major grid is being printed.

show.total

Logical, if TRUE, a total summary line for all aggregated grp is added.

annotate.total

Logical, if TRUE and show.total = TRUE, the total-row in the figure will be highlighted with a slightly shaded background.

show.p

Logical, adds significance levels to values, or value and variable labels.

show.n

logical, if TRUE, adds total number of cases for each group or category to the labels.

Value

A ggplot-object.

Details

The p-values are based on chisq.test of x and y for each grp.

Examples

if (requireNamespace("haven")) {
  data(efc)

  # the proportion of dependency levels in female
  # elderly, for each family carer's relationship
  # to elderly
  plot_gpt(efc, e42dep, e16sex, e15relat)

  # proportion of educational levels in highest
  # dependency category of elderly, for different
  # care levels
  plot_gpt(efc, c172code, e42dep, n4pstu)
}