Yihui, Could you please show me an example? What u have refered is clear for me, but i think the thing that i donot know how to handle with is to link the relationships between skewness/kurtosis and the distributions? Thanks.
On Tue, Sep 23, 2008 at 11:48 PM, Yihui Xie <[EMAIL PROTECTED]> wrote: > 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]> < > [EMAIL PROTECTED] <[EMAIL PROTECTED]>> > > Website: www.statABC.com <http://www.statabc.com/> > > [***********************************************************************] > > oooO::::::::: > > (..)::::::::: > > :\.(:::Oooo:: > > ::\_)::(..):: > > :::::::)./::: > > ::::::(_/:::: > > ::::::::::::: > > > -- 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:: ::\_)::(..):: :::::::)./::: ::::::(_/:::: ::::::::::::: [[alternative HTML version deleted]] ______________________________________________ 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.
