Rmisc (version 1.5)

summarySE: Summarizes data

Description

Gives count, mean, standard deviation, standard error of the mean, and confidence interval (default 95%).

Usage

summarySE(data = NULL, measurevar, groupvars = NULL,
    na.rm = FALSE, conf.interval = 0.95, .drop = TRUE)

Arguments

data

a data frame

measurevar

the name of a column that contains the variable to be summariezed

groupvars

a vector containing names of columns that contain grouping variables

na.rm

a boolean that indicates whether to ignore NA's

conf.interval

the percent range of the confidence interval (default is 95%)

.drop

should combinations of variables that do not appear in the input data be preserved (FALSE) or dropped (TRUE, default)

Value

a data frame with count, mean, standard deviation, standard error of the mean, and confidence interval (default 95%).

References

http://www.cookbook-r.com/Graphs/Plotting_means_and_error_bars_(ggplot2)