sem | R Documentation |
Compute the standard error of the mean (SEM). The SEM is the standard deviation of the sample-mean's estimate of a population mean.
It therefore describes the accuracy of the calculation of a sample's mean.
If na.rm
is TRUE
then missing values are removed before computation proceeds.
sem(x, na.rm = FALSE)
x |
a numeric vector |
na.rm |
logical. Should missing values be removed? |
A numeric scalar – the standard error of the mean.
The SEM of a zero-length vector (after removal of NA
s if na.rm = TRUE
) is not defined and gives an error.
The SEM of a length-one vector is NA
.
sd
## Calculate mean and SEM for variable soil depth
mean(schedenenv$soil_depth)
sem(schedenenv$soil_depth)
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