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On 22 Apr 2005 at 20:47, Wendy Petti wrote:
> http://www.ndt-ed.org/EducationResources/Math/Math-e.htm
>
> The constant e figures into bell-shaped curves, among other things, just as
> the constant pi figures into circles.
to bellcurve :x :mu :sigma
output 1 / (:sigma * sqrt 2 * pi) * exp -0.5 * power ((:x - :mu) / :sigma) 2
end
to plot
cg pu
dotimes [i 400] [
let [x 3 * (:i - 200) / 200]
let [y bellcurve :x 0 1]
setpos list 100 * :x 400 * :y
pd
]
end
Daniel
*****************************
OpenWorld Learning
http://www.openworldlearning.org
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