On Thu, 3 Jul 2003, michael watson (IAH-C) wrote: > Fantastic. You're right, I was looking for seq(). > > However, my plan for using it for hist() was foiled! > > I thought if I did something like: > > > b <- seq(0,500,10) > > hist(myvble,breaks=b) > > It would bin myvble into the bins 0-50,50-100,100-150 etc and in that way I could > ensure that two histograms are on the same scale with the same bins! > > I get the following error: > > Error in hist.default(Cy5, breaks = s) : some 'x' not counted; maybe 'breaks' do not > span range of 'x' > > Now this makes sense of course, my bins probably DON'T span the entire > range of X. SOOOOO I am still left with the same problem: > > 1) two variables > 2) I want to draw histograms of both > 3) I want them to have the SAME x-y scale on the graph > 4) I want them to have the SAME bin range > > How do i do it? Any suggestions?
SOOOOO choose a range of breaks to span the whole range of x! Hint: hist(c(x1, x2)) knows how to do it, and may even provide you a suitable vector of breaks in its return value. > Cheers > Mick > > -----Original Message----- > From: Hotz, T. [mailto:[EMAIL PROTECTED] > Sent: 03 July 2003 14:16 > To: michael watson (IAH-C); [EMAIL PROTECTED] > Subject: RE: [R] Generating a vector for breaks in a histogram > > > Dear Mick, > > Have a look at ?seq - seq(1,20,length=20) should do it. > > HTH > > Thomas > > --- > > Thomas Hotz > Research Associate in Medical Statistics > University of Leicester > United Kingdom > > Department of Epidemiology and Public Health > 22-28 Princess Road West > Leicester > LE1 6TP > Tel +44 116 252-5410 > Fax +44 116 252-5423 > > Division of Medicine for the Elderly > Department of Medicine > The Glenfield Hospital > Leicester > LE3 9QP > Tel +44 116 256-3643 > Fax +44 116 232-2976 > > > > -----Original Message----- > > From: michael watson (IAH-C) [mailto:[EMAIL PROTECTED] > > Sent: 03 July 2003 14:02 > > To: '[EMAIL PROTECTED]' > > Subject: [R] Generating a vector for breaks in a histogram > > > > > > Hi > > > > I have two lots of numbers which I would like to histogram > > using the hist() function. For comparative reasons, I want > > them to be on the same scale, which I can use the xlim and > > ylim options to achieve. > > > > However, having them on the same scale is meaningless unless > > they have the same "breaks". Consulting the documentation, > > there are 4 ways of defining the number of breaks, only one > > of which is "definite", the others merely form suggestions, > > which I have found is not good enough. > > > > The only definite way is to provide a vector to the hist() > > function which is a vector of the break points for the > > histogram. So I need to generate a vector that contains say, > > 500, numbers in it, equi-distance apart between a min and a max. EG: > > > > > myfunc(n=20,min=1,max=20) > > > > would provide a vector, length 20, with the numbers 1 through > > 20 in it. > > > > Is there a function in R that can do this? > > > > Thanks > > Mick > > > > ______________________________________________ > > [EMAIL PROTECTED] mailing list > > https://www.stat.math.ethz.ch/mailman/listinfo/r-help > > > > ______________________________________________ > [EMAIL PROTECTED] mailing list > https://www.stat.math.ethz.ch/mailman/listinfo/r-help > -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
