Hi,
In the essay on Sudoku solutions at http://www.jsoftware.com/jwiki/Essays/Sudoku the first line j =. (]/. i...@#) ,{;~3#i.3 generates the indicies for each box. As a relative newcomer to J I am trying to figure out the relationship between the matrix created by the expression on the LHS of the ravel (,) and the paired box values on the RHS of this expression. I can "tune" the shape and contents of matrix created on the LHS to some degree by varying the paired values on the RHS. Could someone please clarify the relationship between the limited shaping of the matrix on the left by varying the pairs of values in the box list - keeping in mind I don't have all of J's nuances under the belt yet? Thanks Rob ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
