ttype.SnnsR low-level function to get all units in the net of a certain ttype.
Possible ttype defined by SNNS are, among others:
"UNIT_OUTPUT", "UNIT_INPUT", and "UNIT_HIDDEN". For a full list,
call RSNNS:::SnnsDefines$topologicalUnitTypes
As this is an SnnsR low-level function, you may want to have a look
at SnnsR-class to find out how to properly use it.
# S4 method for SnnsR
getAllUnitsTType(ttype)a vector with integer numbers identifying the units.
a string containing the ttype.
SnnsRObject$getAllOutputUnits, SnnsRObject$getAllInputUnits, SnnsRObject$getAllHiddenUnits