Creating a bell-shapped (Gaussian) curve with the Pen Tool

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hello everyone,

i'm trying create bell-shaped (gaussian) curve in photoshop cs3, using pen tool, apparently not enough it... can create curve resembles simple parabola - 1 http://4.bp.blogspot.com/_bhbx8ycvel4/sihhjymdcgi/aaaaaaaaa-g/2dc_tf1kz5c/s400/400px-para bola.svg.png upside-down; can't figure out how further go here in order add inflexions on sides make parabola gaussian curve, this: http://naturalcureinsomnia.com/img/bell-curve.gif

can help? in advance!

simple.
go goggle , type in "make gaussian curve in ps cs3. there 3,320 hits choose from.

or try web page. save , use template?

http://hyperphysics.phy-astr.gsu.edu/hbase/math/gaufcn.html


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