changeRefGroupDS {dsBase} | R Documentation |
Changes a reference level of a factor
Description
This function is similar to R function relevel
,
Usage
changeRefGroupDS(xvect, ref = NULL, reorderByRef = NULL)
Arguments
xvect |
a factor vector |
ref |
a character, the reference level |
reorderByRef |
a boolean that tells whether or not the new vector should be ordered by the reference group. |
Details
In addition to what the R function does, this function allows for the user to re-order the vector, putting the reference group first. If the user chooses the re-order a warning is issued as this can introduce a mismatch of values if the vector is put back into a table that is not reordered in the same way. Such mismatch can render the results of operations on that table invalid.
Value
a factor of the same length as xvect
Author(s)
Isaeva, J., Gaye, A.
[Package dsBase version 6.3.3 Index]