On 19-Sep-07 23:04:57, Mike Meredith wrote: > > > I think the function you need is 'help.search'; try: > > help.search("binomial") > > and look for something obvious in the 'stats' package. > A good deal quicker and easier than posting to an internet forum! > > Cheers, Mike.
Well ... help.search("root") ?uniroot ?pbinom n<-10; k<-4; alpha<-0.95; f<-function(p){ pbinom(k,n,p)-alpha } uniroot(f,c(0,1)) ## $root ## [1] 0.2224413 ## $f.root ## [1] -1.588189e-07 ## $iter ## [1] 10 ## $estim.prec ## [1] 6.103516e-05 #Check: pbinom(k,n, 0.2224413) ## [1] 0.9499998 > > > cathelf wrote: >> >> Dear all, >> >> I am trying a find the value "p" in binomial. >> >> X ~ Bin(n,p) >> >> I want to find the value "p", so that Pr(X <= k) <= alpha >> >> Here, n, k and alpha are known. n, k are integers. alpha is between >> (0,1). >> >> Thanks a lot! >> >> Catherine >> > > -- > View this message in context: > http://www.nabble.com/how-to-find-%22p%22-in-binomial%28n%2Cp%29-tf44842 > 27.html#a12787900 > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. -------------------------------------------------------------------- E-Mail: (Ted Harding) <[EMAIL PROTECTED]> Fax-to-email: +44 (0)870 094 0861 Date: 20-Sep-07 Time: 00:34:22 ------------------------------ XFMail ------------------------------ ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.