sjPlot (version 2.1.0)

dist_norm: 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

specified 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)