[R] BoxPlots, 1 Way ANOVA and Non-Statisticians.
Dear R-Helpers, I am working in a project and I have a number of observations belonging to several classes. Using a 1 Way ANOVA, I have rejected the equality of means hypothesis with a very small p-value. However, the people I have to present my results to are not statisticians and they are not very likely to be much impressed by a 1.32434e-12 like number/thing. Therefore I have decided to make to boxplots, one for the actual data and the second one for simulated data where the equality of the means holds so that the difference in the distributions can be visually appreciated. The problem is that, for the simulated values, being more regular, the range of variation is smaller and, therefore, the heigth of the window where their boxplot is drawn is also smaller. As a result, the scales of the two boxplots are not the same and part of the appeal of the visual approach is lost in the way. My question is, is there a way to make two different boxplots within a "common window"? (Or rather, a common size window or, more concretely, so that it spans over the same range on the vertical axis). Sincerely, Carlos J. Gil Bellosta Sigma Consultores Estadi'sticos http://www.consultoresestadisticos.com __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] BoxPlots, 1 Way ANOVA and Non-Statisticians.
Carlos: You could just give the same values for the ylim argument in each boxplot par(mfrow=c(1,2), las=1) boxplot(rnorm(10), rnorm(10), rnorm(10), ylim=c(-3,3)) boxplot(rnorm(10, 0.5, 1), rnorm(10, -.5, 1), rnorm(10), ylim=c(-3,3)) Carlos J. Gil Bellosta wrote: I am working in a project and I have a number of observations belonging to several classes. Using a 1 Way ANOVA, I have rejected the equality of means hypothesis with a very small p-value. However, the people I have to present my results to are not statisticians and they are not very likely to be much impressed by a 1.32434e-12 like number/thing. Therefore I have decided to make to boxplots, one for the actual data and the second one for simulated data where the equality of the means holds so that the difference in the distributions can be visually appreciated. The problem is that, for the simulated values, being more regular, the range of variation is smaller and, therefore, the heigth of the window where their boxplot is drawn is also smaller. As a result, the scales of the two boxplots are not the same and part of the appeal of the visual approach is lost in the way. My question is, is there a way to make two different boxplots within a "common window"? (Or rather, a common size window or, more concretely, so that it spans over the same range on the vertical axis). -- Chuck Cleland, Ph.D. NDRI, Inc. 71 West 23rd Street, 8th floor New York, NY 10010 tel: (212) 845-4495 (Tu, Th) tel: (732) 452-1424 (M, W, F) fax: (917) 438-0894 __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
RE: [R] BoxPlots, 1 Way ANOVA and Non-Statisticians.
Also check out bplot() function in the library fields. > -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of Chuck Cleland > Sent: 30 March 2004 20:07 > To: Carlos J. Gil Bellosta > Cc: [EMAIL PROTECTED] > Subject: Re: [R] BoxPlots, 1 Way ANOVA and Non-Statisticians. > > > Carlos: >You could just give the same values for the ylim argument in each > boxplot > > par(mfrow=c(1,2), las=1) > boxplot(rnorm(10), rnorm(10), rnorm(10), ylim=c(-3,3)) > boxplot(rnorm(10, 0.5, 1), rnorm(10, -.5, 1), rnorm(10), ylim=c(-3,3)) > > Carlos J. Gil Bellosta wrote: > > I am working in a project and I have a number of observations belonging > > to several classes. Using a 1 Way ANOVA, I have rejected the > equality of > > means hypothesis with a very small p-value. However, the people I have > > to present my results to are not statisticians and they are not very > > likely to be much impressed by a 1.32434e-12 like number/thing. > > > > Therefore I have decided to make to boxplots, one for the actual data > > and the second one for simulated data where the equality of the means > > holds so that the difference in the distributions can be visually > > appreciated. > > > > The problem is that, for the simulated values, being more regular, the > > range of variation is smaller and, therefore, the heigth of the window > > where their boxplot is drawn is also smaller. As a result, the > scales of > > the two boxplots are not the same and part of the appeal of the visual > > approach is lost in the way. > > > > My question is, is there a way to make two different boxplots within a > > "common window"? (Or rather, a common size window or, more concretely, > > so that it spans over the same range on the vertical axis). > > -- > Chuck Cleland, Ph.D. > NDRI, Inc. > 71 West 23rd Street, 8th floor > New York, NY 10010 > tel: (212) 845-4495 (Tu, Th) > tel: (732) 452-1424 (M, W, F) > fax: (917) 438-0894 > > __ > [EMAIL PROTECTED] mailing list > https://www.stat.math.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
