means_graph: Graph Means Across a Grouping Variable

In vandomed/dvmisc: Convenience Functions, Moving Window Statistics, and Graphics

Description

Creates plot showing mean of Y variable across levels of a grouping variable, with customizable error bars. Observations with missing values for y and/or group are dropped.

Usage

means_graph(
  y,
  group,
  error.bars = "t.ci",
  alpha = 0.05,
  p.legend = TRUE,
  plot.list = NULL,
  lines.list = NULL,
  axis.list = NULL,
  legend.list = NULL,
  ...
)

Arguments

y	Numeric vector of values for the continuous variable.
group	Vector of values indicating what group each y observation belongs to. Function plots group levels across x-axis in same order as table(group).
error.bars	Character string indicating what the error bars should represent. Possible values are "sd" for +/- one standard deviation, "se" for +/- one standard error, "t.ci" for 95% confidence interval based on t distribution, "z.ci" for 95% confidence interval based on Z distribution, and "none" for no error bars.
alpha	Numeric value indicating what alpha should be set to for confidence intervals. Only used if error.bars is "t.ci" or "z.ci".
p.legend	If TRUE, p-value (from t.test function if group has 2 levels, otherwise aov function) is printed in a legend.
plot.list	Optional list of inputs to pass to plot function.
lines.list	Optional list of inputs to pass to lines function.
axis.list	Optional list of inputs to pass to axis function.
legend.list	Optional list of inputs to pass to legend function.
...	Additional arguments to pass to t.test or aov.

Value

Plot showing mean of y across levels of group.

vandomed/dvmisc documentation built on Oct. 2, 2020, 9:50 p.m.