set_datatype

Change the element type of an ndarray in place.

$pdl->set_datatype($typecode);

$typecode is the integer type code, as get_datatype and a type’s enum return; it must be in range or the call croaks with set_datatype: datatype out of range.

A null ndarray that has no data yet simply takes on the new type. Otherwise the existing values are converted, exactly as convert would, but the ndarray itself is modified rather than a new one returned. PDL::IO::Storable uses this when reconstituting an ndarray it has read back.