R: Plot normal distributions

dist_norm {sjPlot}

R Documentation

Plot normal distributions

Description

This function plots a simple normal distribution or a normal distribution with shaded areas that indicate at which value a significant p-level is reached.

Usage

dist_norm(norm = NULL, mean = 0, sd = 1, p = NULL, xmax = NULL,
  geom.colors = NULL, geom.alpha = 0.7)

Arguments

`norm`	Numeric, optional. If specified, a normal distribution with `mean` and `sd` is plotted and a shaded area at `norm` value position is plotted that indicates whether or not the specified value is significant or not. If both `norm` and `p` are not specified, a distribution without shaded area is plotted.
`mean`	Numeric. Mean value for normal distribution. By default 0.
`sd`	Numeric. Standard deviation for normal distribution. By default 1.
`p`	Numeric, optional. If specified, a normal distribution with `mean` and `sd` is plotted and a shaded area at the position where the specified p-level starts is plotted. If both `norm` and `p` are not specified, a distribution without shaded area is plotted.
`xmax`	Numeric, optional. Specifies the maximum x-axis-value. If not specified, the x-axis ranges to a value where a p-level of 0.00001 is reached.
`geom.colors`	user defined color for geoms. See 'Details' in `sjp.grpfrq`.
`geom.alpha`	Specifies the alpha-level of the shaded area. Default is 0.7, range between 0 to 1.

Examples

# a simple normal distribution
dist_norm()

# a simple normal distribution with different mean and sd.
# note that curve looks similar to above plot, but axis range
# has changed.
dist_norm(mean = 2, sd = 4)

# a simple normal distribution
dist_norm(norm = 1)

# a simple normal distribution
dist_norm(p = 0.2)

[Package sjPlot version 2.4.1 Index]