A standard CEP name has four first letters of the generic name and
four first letters of the specific epithet of a Latin name. The last
epithet, that may be a subspecific name, is used in the current
function. If the name has only one component, it is abbreviated to
eight characters (see
The returned names are made unique with function
make.unique which adds numbers to the end of CEP names if needed.
The names to be formatted into CEP names.
Take always the second item of the original name to the abbreviated name instead of the last original item (default).
Cornell Ecology Programs (CEP) used eight-letter
abbreviations for species and site names. In species, the names were
formed by taking four first letters of the generic name and four
first letters of the specific or subspecific epithet. The current
function first makes valid R names using
and then splits these into elements. The CEP name is made by taking
the four first letters of the first element, and four first letters
of the last (default) or the second element (with
seconditem = TRUE). If there was only one name element, it is
abbreviated to eight letters. Finally, the names are
made unique which may add numbers to duplicated names.
The CEP names were originally used, because old
did not have
CHARACTER data type, but text had to be stored
in numerical variables, which in popular computers could hold four
characters. In modern times, there is no reason for this limitation,
but ecologists are used to these names, and they may be practical to
avoid congestion in ordination plots.
Function returns CEP names.
The function is simpleminded and rigid. You must write a better one if you need.
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