droplevels
{base}
Drop Unused Levels from Factors
levels
{base}
Get levels of a factor
median
{stats}
Get median of a vector
ifelse
{base}
Return a or b depending on the value of test
relevel
{stats}
Set a reference level for a factor variable
log
{base}
log (default base = e)
t.test
{stats}
Performs one and two sample t-tests on vectors of data.
as.factor
{base}
Coerce a vector to factor
sapply
{base}
Apply a function over a vector or list and simplify the result
fct_relevel
{forcats}
Reorder factor levels by hand
The end!