Plot an empirical density with the matching normal distribution

Compares empirical data to a normal distribution with the same mean and standard deviation.

PlotDistDensityNormal(
  frm,
  xvar,
  title,
  ...,
  adjust = 0.5,
  curve_color = "lightgray",
  normal_color = "blue",
  mean_color = "blue",
  sd_color = "darkgray"
)

Arguments

frm	data frame to get values from
xvar	name of the independent (input or model) column in frame
title	title to place on plot
...	no unnamed argument, added to force named binding of later arguments.
adjust	passed to geom_density; controls smoothness of density plot
curve_color	color for empirical density curve
normal_color	color for theoretical matching normal
mean_color	color of mean line
sd_color	color for 1-standard deviation lines (can be NULL)

Details

Plots the empirical density, the theoretical matching normal, the mean value, and plus/minus one standard deviation from the mean.

See also

geom_density

Examples

set.seed(52523)
d <- data.frame(wt=100*rnorm(100))
PlotDistDensityNormal(d,'wt','example')

# no sd lines
PlotDistDensityNormal(d, 'wt', 'example', sd_color=NULL)