I have a 2 column matrix of indices: first column specifies the row index and the second specifies the column index. There may be several records pointing to one row. For example:
y 3 5 3 7 3 8 5 2 5 6 I have to check those specified locations in the target matrix to see if the values there are 0 or not. How should I do that? The target matrix shape is 10000 500, which probably sets some limits to possible operations. Kairit Sirts ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
