Computes standard error of the mean.
Computes the standard error of the mean (i.e., standard deviation divided by the square root of the sample size).
se(x, na.rm = TRUE)
x |
A numeric vector. |
na.rm |
A logical that indicates whether missing values should be removed before computing the standard error. |
A single numeric that is the standard error of the mean of x.
Derek H. Ogle, derek@derekogle.com
See se in sciplot for similar functionality.
x <- 1:20 sd(x)/sqrt(length(x)) se(x) # all return NA if missing values are not removed x2 <- c(x,NA) sd(x2)/sqrt(length(x2)) # Better if missing values are removed se(x2,na.rm=FALSE) sd(x2,na.rm=TRUE)/sqrt(length(x2[complete.cases(x2)])) se(x2)
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