SeeDist: SeeDist - See The Distribution

In ibecav/CGPfunctions: Powell Miscellaneous Functions for Teaching and Learning Statistics

Description

This function takes a vector of numeric data and returns one or more ggplot2 plots that help you visualize the data. Meant to be a useful wrapper for exploring univariate data. Has a plethora of options including type of visualization (histogram, boxplot, density, violin) as well as commonly desired overplots like mean and median points, z and t curves etc.. Common descriptive statistics are provided as a subtitle if desired and sent to the console as well.

Usage

SeeDist(
  x,
  title = "Default",
  subtitle = "Default",
  numbins = 0,
  xlab = NULL,
  var_explain = NULL,
  data.fill.color = "deepskyblue",
  mean.line.color = "darkgreen",
  median.line.color = "yellow",
  mode.line.color = "orange",
  mean.line.type = "longdash",
  median.line.type = "dashed",
  mode.line.type = "dashed",
  mean.line.size = 1.5,
  median.line.size = 1.5,
  mean.point.shape = 21,
  median.point.shape = 23,
  mean.point.size = 4,
  median.point.size = 4,
  zcurve.color = "red",
  zcurve.type = "twodash",
  zcurve.size = 1,
  tcurve.color = "black",
  tcurve.type = "dotted",
  tcurve.size = 1,
  mode.line.size = 1,
  whatplots = c("d", "b", "h", "v"),
  k = 2,
  add_jitter = TRUE,
  add_rug = TRUE,
  xlim_left = NULL,
  xlim_right = NULL,
  ggtheme = ggplot2::theme_bw()
)

Arguments

x	the data to be visualized. Must be numeric.
title	Optionally replace the default title displayed. title = NULL will remove it entirely. title = "" will provide an empty title but retain the spacing. A sensible default is provided otherwise.
subtitle	Optionally replace the default subtitle displayed. subtitle = NULL will remove it entirely. subtitle = "" will provide an empty subtitle but retain the spacing. A sensible default is provided otherwise.
numbins	the number of bins to use for any plots that bin. If nothing is specified the function will calculate a rational number using Freedman-Diaconis via the nclass.FD function
xlab	Custom text for the 'x' axis label (Default: 'NULL', which will cause the 'x' axis label to be the 'x' variable).
var_explain	additional contextual information about the variable as a string such as "Miles Per Gallon" which is appended to the default title information.
data.fill.color	Character string that specifies fill color for the main data area (Default: 'deepskyblue').
mean.line.color, median.line.color, mode.line.color	Character string that specifies line color (Default: 'darkgreen', 'yellow', 'orange').
mean.line.type, median.line.type, mode.line.type	Character string that specifies line color (Default: 'longdash', 'dashed', 'dashed').
mean.line.size, median.line.size, mode.line.size	Numeric that specifies line size (Default: '1.5', '1.5', '1'). You can set to '0' to make any of the lines "disappear".
mean.point.shape, median.point.shape	Integer in 0 - 25 specifies shape of mean or median point mark on the violin plot (Default: '21', '23').
mean.point.size, median.point.size	Integer specifies size of mean or median point mark on the violin plot (Default: '4'). You can set to '0' to make any of the points "disappear".
zcurve.color, tcurve.color	Character string that specifies line color (Default: 'red', 'black').
zcurve.type, tcurve.type	Character string that specifies line color (Default: 'twodash', 'dotted').
zcurve.size, tcurve.size	Numeric that specifies line size (Default: '1'). You can set to '0' to make any of the lines "disappear".
whatplots	what type of plots? The default is whatplots = c("d", "b", "h", "v") for a density, a boxplot, a histogram, and a violin plot
k	Number of digits after decimal point (should be an integer) (Default: k = 2) for statistical results.
add_jitter	Logical (Default: 'TRUE') controls whether jittered data ponts are added to violin plot.
add_rug	Logical (Default: 'TRUE') controls whether "rug" data points are added to density plot and histogram.
xlim_left, xlim_right	Logical. For density plots can be used to override the default which is 3 std deviations left and right of the mean of x. Useful for theoretical reasons like horsepower < 0 or when 'ggplot2' warns you that it has removed rows containing non-finite values (stat_density).
ggtheme	A function, ggplot2 theme name. Default value is ggplot2::theme_bw(). Any of the ggplot2 themes, or themes from extension packages are allowed (e.g., hrbrthemes::theme_ipsum(), etc.).

Value

from 1 to 4 plots depending on what the user specifies as well as an extensive summary courtesy 'DescTools::Desc' printed to the console

Warning

If the data has more than 3 modal values only the first three of them are plotted. The rest are ignored and the user is warned on the console.

Missing values are removed with a warning to the user

Author(s)

Chuck Powell

See Also

nclass

Examples

SeeDist(rnorm(100, mean = 100, sd = 20), numbins = 15, var_explain = "A Random Sample")
SeeDist(mtcars$hp, var_explain = "Horsepower", whatplots = c("d", "b"))
SeeDist(iris$Sepal.Length, var_explain = "Sepal Length", whatplots = "d")

ibecav/CGPfunctions documentation built on Nov. 17, 2020, 5:08 a.m.