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shadcop
2007 Nov 02
2
Shading area under PDF of t -distribution
Dear R experts,
I have plot the PDF of t distribution with df = 74.
curve(dt(x,df=74),from=-4, to=4)
how can I shade the area under curve (for example, col="red") from t=+- 1.996?
Thank you.
Regards,
CH
--
CH Chan
Research Assistant - KWH
http://www.macgrass.com