[R] z and p

Peter Dalgaard p.dalgaard at biostat.ku.dk
Tue Mar 15 20:18:19 CET 2005

Adrian Dusa <adi at roda.ro> writes:

> Dear useRs,
> I use pnorm to calculate the area under the normal curve to the left of z. 
> Now, is there a function which provides the z value given a certain area?
> I wrote a function which finds it in about 20 iterations, but it seems to me 
> not the best solution; I'm just curios if there is an already built function.

Yes, qnorm.
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907

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