"xifti"Apply a many-to-N function (e.g. mean) to the rows or columns of a
"xifti". If applied row-wise, a "xifti" with N data column(s)
is returned. (If the "xifti" had the dlabel intent, and values that
are not labels are created, then it is converted to dscalar.) If applied
column-wise, a numeric matrix with N rows is returned.
For univariate functions, use transform_xifti instead.
apply_xifti(xifti, margin = c(1, 2), FUN, ...)A "xifti" object.
The dimension along which to apply FUN: 1 for rows (default)
and 2 for columns.
The function. It should take in a numeric vector and return a length-N numeric vector.
Additional arguments to FUN
A "xifti" if margin == 1, or a numeric matrix if
margin == 2
Other functions for manipulating `xifti` objects:
add_surf(),
combine_xifti(),
convert_to_dlabel(),
merge_xifti(),
newdata_xifti(),
remove_xifti(),
select_xifti(),
transform_xifti()