plot_1num2fac {mixgb}

Box plots with overlaying data points for a numeric variable vs a factor condition on another factor

Description

Plot observed values versus m sets of imputed values for one specified numeric variable and two factors using ggplot2.

Usage

plot_1num2fac(
  imputation.list,
  var.fac,
  var.num,
  con.fac,
  original.data,
  true.data = NULL,
  color.pal = NULL,
  shape = FALSE
)

Arguments

imputation.list

A list of m imputed datasets returned by the mixgb imputer

var.fac

A factor variable on the x-axis

var.num

A numeric variable on the y-axis

con.fac

The name of a factor to condition on

original.data

The original data with missing data

true.data

The true data without missing values. This is generally unknown in practice. If the true data is known (e.g., in cases where it is generated by simulation), it can be specified in this argument. The output will then have an extra panel called MaskedTrue, which shows values originally observed but intentionally made missing.

color.pal

A vector of hex color codes for the observed and m sets of imputed values panels. The vector should be of length m+1. Default: NULL (use "gray40" for the observed panel, use ggplot2 default colors for other panels.)

shape

Whether to plot shapes for different types of missing values. By default, this is set to FALSE to speed up plotting. We only recommend using 'shape = TRUE' for small datasets.

Value

Boxplots with overlaying data points

Examples

# create some extra missing values in factor variables "HSSEX" and "DMARETHN"
nhanes3_NA <- createNA(nhanes3, var.names = c("HSSEX", "DMARETHN"), p = 0.1)

# obtain m multiply datasets
params <- list(max_depth = 3, subsample = 0.8, nthread = 2)
imputed.data <- mixgb(data = nhanes3_NA, m = 3, xgb.params = params, nrounds = 30)

# plot the multiply imputed values for variables "BMPRECUM" versus "HSSEX" conditional on "DMARETHN"
plot_1num2fac(
  imputation.list = imputed.data, var.fac = "HSSEX", var.num = "BMPRECUM",
  con.fac = "DMARETHN", original.data = nhanes3_NA
)