Dan Bron wrote: > Actually, ;@:(i.@:}:@:$ ,.&.> <@I.) is little bit faster: Not on my machine. Using your definitions: ts 'coord0 M' 0.745896 1.67773e8 ts 'coord1 M' 0.786608 1.21533e8 These measurements are repeatable. With my machine, coord0 seems faster, though it uses more space. Is there any chance the sample data you used was pushing your machine into swap? -- Raul
---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
