Manually generate distribution plots from an xpdb object.

xplot_distrib(
xpdb,
mapping = NULL,
type = "hr",
guide = FALSE,
xscale = "continuous",
yscale = "continuous",
title = NULL,
subtitle = NULL,
caption = NULL,
tag = NULL,
plot_name = "density_plot",
gg_theme,
xp_theme,
opt,
quiet,
...
)

Arguments

xpdb An xpose_data object generated with xpose_data. List of aesthetics mappings to be used for the xpose plot (e.g. point_color). String setting the type of plot to be used. Can be histogram 'h', density 'd', rug 'r' or any combination of the three. Should the guide (e.g. reference distribution) be displayed. Scale type for x axis (e.g. 'continuous', 'discrete', 'log10'). Scale type for y axis (e.g. 'continuous', 'discrete', 'log10'). Plot title. Use NULL to remove. Plot subtitle. Use NULL to remove. Page caption. Use NULL to remove. Plot identification tag. Use NULL to remove. Name to be used by xpose_save() when saving the plot. A complete ggplot2 theme object (e.g. theme_classic), a function returning a complete ggplot2 theme, or a change to the current gg_theme. A complete xpose theme object (e.g. theme_xp_default) or a list of modifications to the current xp_theme (e.g. list(point_color = 'red', line_linetype = 'dashed')). A list of options in order to create appropriate data input for ggplot2. For more information see data_opt. Logical, if FALSE messages are printed to the console. Any additional aesthetics.

Layers mapping

Plots can be customized by mapping arguments to specific layers. The naming convention is layer_option where layer is one of the names defined in the list below and option is any option supported by this layer e.g. histogram_fill = 'blue', rug_sides = 'b', etc.

• histogram: options to geom_histogram

• density: options to geom_density

• rug: options to geom_rug

• xscale: options to scale_x_continuous or scale_x_log10

• yscale: options to scale_y_continuous or scale_y_log10

Faceting

Every xpose plot function has built-in faceting functionalities. Faceting arguments are passed to the functions facet_wrap_paginate when the facets argument is a character string (e.g. facets = c('SEX', 'MED1')) or facet_grid_paginate when facets is a formula (e.g. facets = SEX~MED1). All xpose plot functions accept all the arguments for the facet_wrap_paginate and facet_grid_paginate functions e.g. dv_vs_ipred(xpdb_ex_pk, facets = SEX~MED1, ncol = 3, nrow = 3, page = 1, margins = TRUE, labeller = 'label_both').

Faceting options can either be defined in plot functions (e.g. dv_vs_ipred(xpdb_ex_pk, facets = 'SEX')) or assigned globally to an xpdb object via the xp_theme (e.g. xpdb <- update_themes(xpdb_ex_pk, xp_theme = list(facets = 'SEX'))). In the latter example all plots generate from this xpdb will automatically be stratified by SEX.

By default, some plot functions use a custom stratifying variable named variable, e.g. eta_distrib(). When using the facets argument, variable needs to be added manually e.g. facets = c('SEX', 'variable') or facets = c('SEX', 'variable'), but is optional, when using the facets argument in xp_theme variable is automatically added whenever needed.

Template titles

Template titles can be used to create highly informative diagnostics plots. They can be applied to any plot title, subtitle, caption and tag. Template titles are defined via a single string containing key variables staring with a @ (e.g. @ofv) which will be replaced by their actual value when rendering the plot. For example '@run, @nobs observations in @nind subjects' would become 'run001, 1022 observations in 74 subjects'. The available key variables are listed under template_titles.

xplot_scatter xplot_qq
# A simple histogram
xplot_distrib(xpdb_ex_pk, aes(x = WT), type = 'hr')#> Using data from $prob no.1 # A simple density plot xplot_distrib(xpdb_ex_pk, aes(x = CWRES), type = 'dr')#> Using data from$prob no.1