plot|:^@-@-:@^&2"0 D.(i.3)10%~50-~i.101
NB. The blue curve is the bell curve. Mean value = 50. Standard deviation = 10NB. The read curve is the derivative of the blue curve. It crosses Y=0 at X=50NB. The green curve is the derivative of the red curve. It crosses Y=0 at X=50-10 and X=50+10 NB. But why is the green curve so ugly around X=50? Thank you! Bo. ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
