Description Usage Arguments Value
Summarize a continuous variable by groups with mean, sd and SE
1 2  | 
data | 
 A data.frame  | 
measurevar | 
 A name of variable to measure a mean and sd  | 
groupvars | 
 Name(s) of variable used as a grouping variables  | 
conf.interval | 
 confidence interval  | 
na.rm | 
 A logical value indicating whether or not remove NA values  | 
.drop | 
 should combinations of variables that do not appear in the input data be preserved (FALSE) or dropped (TRUE, default)  | 
A data.frame summarized a continuous variable by groups with mean, sd and SE
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