I'm tring to plot a nuclear decay curve in Maple. I need to calculate the activity at regular time intervals which I'm doing by using a repetition statement to create an array something like: > for time from 1 by interval to 600 do.... etc. It's working the arrays out fine, but when I try to use pointplot(array) for anything other than an interval of 1, it gives me the error: "Error, (in pointplot) incorrect first argument". If anyone can explain what this means or suggest why a curve will plot for an interval of 1 but no other number, I'd be very grateful! Thanks in advance.