Set the preference pref to the given val in the named preference group group.
The named preference group must be a string.
The preference pref may be a string or a cell array of strings.
The corresponding value val may be any Octave value, .e.g., double, struct, cell array, object, etc. Or, if pref is a cell array of strings then val must be a cell array of values with the same size as pref.
If the named preference or group does not exist, it is added.
See also: addpref, getpref, ispref, rmpref.
Package: octave