# Compute quantiles with values and correspondent frequencies

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## Compute quantiles with values and correspondent frequencies

 Dear List, quantile(x) function allows to obtain specified quantiles of a vector of observations x. Is there an analogous function to compute quantiles in the case one have the vector of the observations x and the correspondent vector f of relative frequencies ? Thank you Paolo Radaelli         [[alternative HTML version deleted]] ______________________________________________ [hidden email] mailing list https://stat.ethz.ch/mailman/listinfo/r-helpPLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
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## Re: Compute quantiles with values and correspondent frequencies

 On Fri, 3 Mar 2006, Paolo Radaelli wrote: > Dear List, quantile(x) function allows to obtain specified quantiles of > a vector of observations x. > > Is there an analogous function to compute quantiles in the case one have > the vector of the observations x and the correspondent vector f of > relative frequencies ? Just use rep(): x <- rpois(100, 4) # data quantile(x) tx <- table(x) # frequencies (need to be integer counts) tx v <- as.numeric(names(tx)) # values quantile(rep(v, as.integer(tx))) You have v and tx, so this should work. > > Thank you > > Paolo Radaelli > > > > [[alternative HTML version deleted]] > > ______________________________________________ > [hidden email] mailing list > https://stat.ethz.ch/mailman/listinfo/r-help> PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html> -- Roger Bivand Economic Geography Section, Department of Economics, Norwegian School of Economics and Business Administration, Helleveien 30, N-5045 Bergen, Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43 e-mail: [hidden email] ______________________________________________ [hidden email] mailing list https://stat.ethz.ch/mailman/listinfo/r-helpPLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Roger Bivand Department of Economics NHH Norwegian School of Economics Helleveien 30 N-5045 Bergen, Norway
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## Re: Compute quantiles with values and correspondent frequencies

 Yes, but it works only when you have integer counts for each value. When I have only relative frequencies I can't repeat each value a non-integer number of times. Paolo ----- Original Message ----- From: "Roger Bivand" <[hidden email]> To: "Paolo Radaelli" <[hidden email]> Cc: <[hidden email]> Sent: Friday, March 03, 2006 1:18 PM Subject: Re: [R] Compute quantiles with values and correspondent frequencies > On Fri, 3 Mar 2006, Paolo Radaelli wrote: > > > Dear List, quantile(x) function allows to obtain specified quantiles of > > a vector of observations x. > > > > Is there an analogous function to compute quantiles in the case one have > > the vector of the observations x and the correspondent vector f of > > relative frequencies ? > > Just use rep(): > > x <- rpois(100, 4) # data > quantile(x) > tx <- table(x) # frequencies (need to be integer counts) > tx > v <- as.numeric(names(tx)) # values > quantile(rep(v, as.integer(tx))) > > You have v and tx, so this should work. > > > > > Thank you > > > > Paolo Radaelli > > > > > > > > [[alternative HTML version deleted]] > > > > ______________________________________________ > > [hidden email] mailing list > > https://stat.ethz.ch/mailman/listinfo/r-help> > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html> > > > -- > Roger Bivand > Economic Geography Section, Department of Economics, Norwegian School of > Economics and Business Administration, Helleveien 30, N-5045 Bergen, > Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43 > e-mail: [hidden email] > ______________________________________________ [hidden email] mailing list https://stat.ethz.ch/mailman/listinfo/r-helpPLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
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