Hi, Certainly it's possible. Use any distribution function as long as you can change its skewness and kurtosis, e.g. the Chi-square distribution. The corresponding R functions are p*, q*, d*, and r* - I think you know these functions already (e.g. rchisq()).
The only thing that you should be clear about is the relationship between the arguments of distribution functions in R and those in a certain theoretical distribution. Refer to http://en.wikipedia.org/wiki/Probability_distribution if you don't remember those formulae for skewness and kurtosis. Regards, Yihui -- Yihui Xie <[EMAIL PROTECTED]> Phone: +86-(0)10-82509086 Fax: +86-(0)10-82509086 Mobile: +86-15810805877 Homepage: http://www.yihui.name School of Statistics, Room 1037, Mingde Main Building, Renmin University of China, Beijing, 100872, China On Tue, Sep 23, 2008 at 10:59 PM, zhijie zhang <[EMAIL PROTECTED]> wrote: > Dear R users, > I hope to explain the concepts of skewness and kurtosis by generating > series of distributions with same skewness and different kurtosis or with > same kurtosis and different skewness, but it seems that i cannot find the > right functions. > I have searched the mailing list, but no answers were found. > Is it possible to do that in R? Which function could be used? > Thanks a lot. > > -- > With Kind Regards, > > oooO::::::::: > (..)::::::::: > :\.(:::Oooo:: > ::\_)::(..):: > :::::::)./::: > ::::::(_/:::: > ::::::::::::: > [***********************************************************************] > Zhi Jie,Zhang ,PHD > Tel:+86-21-54237149 > Dept. of Epidemiology,School of Public Health,Fudan University > Address:No. 138 Yi Xue Yuan Road,Shanghai,China > Postcode:200032 > Email:[EMAIL PROTECTED] <[EMAIL PROTECTED]> > Website: www.statABC.com > [***********************************************************************] > oooO::::::::: > (..)::::::::: > :\.(:::Oooo:: > ::\_)::(..):: > :::::::)./::: > ::::::(_/:::: > ::::::::::::: > ______________________________________________ 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.
