Thank you everyone for your help.
> Date: Wed, 4 Sep 2013 20:00:02 -0400 > From: murdoch.dun...@gmail.com > To: dcarl...@tamu.edu > CC: pmassico...@hotmail.com; ruipbarra...@sapo.pt; r-help@r-project.org > Subject: Re: [R] Histogram > > On 13-09-04 4:44 PM, David Carlson wrote:> Good question. It turns out > that the manual page does not tell > > the whole story. > > Do you really think the manual page would be improved if it went into as > much detail as you give below? It does say clearly that breaks is a > "suggestion only". I don't think it would be clearer if it explained > exactly how the suggestion is used. It would just be more complicated, > and less likely to be read. > > Duncan Murdoch > > > Looking at the source code for hist.default, > > the function starts with the number of breaks suggested by > > nclass.Sturges(), but then this number (or any other number of > > breaks that you specify) is passed to pretty() along with the > > maximum and the minimum values of the data (ie range(data)) to > > create "pretty" break intervals. In your example, > > nclass.Sturges() always recommends 8 breaks, but the number of > > the breaks changes based on the minimum and maximum values. So > > the only way to get exactly the number of breaks you want is to > > specify the break intervals yourself. > > > > David Carlson > > > > > > -----Original Message----- > > From: r-help-boun...@r-project.org > > [mailto:r-help-boun...@r-project.org] On Behalf Of philippe > > massicotte > > Sent: Wednesday, September 4, 2013 3:02 PM > > To: Rui Barradas > > Cc: r-help@R-project.org > > Subject: Re: [R] Histogram > > > > Thank you everyone. > > Try executing this: > > replicate(100, length(hist(rnorm(100), nclass = 10)$counts)) > > I'm still not sure why the number of bins (classes) is not > > consistent. > > Thank in advance. > > > >> Date: Wed, 4 Sep 2013 20:27:36 +0100 > >> From: ruipbarra...@sapo.pt > >> To: pmassico...@hotmail.com > >> CC: r-help@r-project.org > >> Subject: Re: [R] Histogram > >> > >> Hello, > >> > >> See the arguments 'right' and 'include.lowest' of ?hist. > >> To give what you want, try instead > >> > >> h1 <- hist(1:10, 10) # counts are 2, 1, 1, ... > >> h2 <- hist(1:10, breaks = 0:10) # all counts are 1 > >> > >> > >> and see the difference between h1 and h2, components 'breaks' > > and 'counts'. > >> > >> Hope this helps, > >> > >> Rui Barradas > >> > >> Em 04-09-2013 19:34, philippe massicotte escreveu: > >>> Hi everyone. > >>> I'm currently translating some Matlab code into R. However, > > I realized that the hsit function produce different results in > > both languages. > >>> in Matlab, hist(1:10, 10) will produce 10 bins with a count > > of 1 in each, but in R it will produce 9 classes with count of > > 2,1,1,1,1,1,1,1,1. > >>> I'm a bit embarrassed to ask such question, but why R is not > > producing 10 classes as requested? > >>> Thanks in advance,Phil > >>> [[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. > >>> > > > > [[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. > > > > ______________________________________________ > > 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. > > > [[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.
