[Gretl-devel] new operation on string-valued series

I'm not documenting this yet because it needs more testing, but in current git I've enabled a new operation on string-valued series: logical product. (Snapshots to follow.) If sv1 and sv2 are string-valued series, then series sv3 = sv1 * sv2 now yields another string-valued series with value si_sj at observations where sv1 has value si and sv2 has value sj. A simple example is afforded by the R dataset warpbreaks (csv version attached). This includes two "factor" series, wool (with values "A" and "B") and tension (with values "L", "M" and "H"). If you multiply them together you get a series with 6 distinct values, "A_L" to "B_H". <hansl> open warpbreaks.csv series wt = wool*tension print -o </hansl> Allin