The function mean_glu is a wrapper for the base function
mean(). Output is a tibble object with subject id and mean values.
Usage
mean_glu(data)
Value
If a data.frame object is passed, then a tibble object with
two columns: subject id and corresponding mean value is returned. If a vector of glucose
values is passed, then a tibble object with just the mean value is returned.
as.numeric() can be wrapped around the latter to output just a numeric value.
Arguments
data
DataFrame object with column names "id", "time", and "gl",
or numeric vector of glucose values.
Details
A tibble object with 1 row for each subject, a column for subject id and
a column for the mean values is returned. NA glucose values are
omitted from the calculation of the mean.