[MWForum]power vs exp

[Daniel Ajoy]

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





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