The documentation at http://www.jsoftware.com/help/dictionary/d211.htm
seems to be only for J32. In particular, one can declare a sparse array with more than imax =: _1+2^31 elements, for example C=:1 $. 1e10; 0; 2-2 */$C 10000000000 ]imax=:_1+2^31x 2147483647 Best wishes, John ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
