rpois(100, 5) gives a different set of random numbers each time it is called, so if you want repeatable results compute it once and use its value in the calls to plot. E.g., r <- rpois(100, 5) plot(table(r), type="h", col="red", lwd=10, main="hello") Bill Dunlap TIBCO Software wdunlap tibco.com
On Tue, Nov 24, 2015 at 11:47 AM, Timothy D. Legg <r...@timothylegg.com> wrote: > Hello, > > I am quite new to R and have high expectations for my future with it. > > R version 3.0.2 (2013-09-25) -- "Frisbee Sailing" > Copyright (C) 2013 The R Foundation for Statistical Computing > Platform: x86_64-pc-linux-gnu (64-bit) > > I have stepped back to an earlier tutorial and found an odd inconsistency > with one of the examples: > > plot(table(rpois(100, 5)), type = "h", col = "red", lwd = 10, main = > "rpois(100, lambda = 5)") > > I read the local documentation on the plot command and it's arguments. > >From that, I learned that 'main' defines the title from a text string. I > decide to modify some values to see how the resulting behavior changes. > What I didn't expect was that modifying the text string caused the chart > to change greatly. > > plot(table(rpois(100, 5)), type = "h", col = "red", lwd = 10, main = > "rpois(100, lambda = 4)") > > With the previous line, the columns change values. > > plot(table(rpois(100, 5)), type = "h", col = "red", lwd = 10, main = "hello") > > This line even adds a 12th column. > > I return to plot the original and the output has changed again. Here are > some screenshots > > http://timothylegg.com/R/lambda5_.png > http://timothylegg.com/R/lambda5.png > http://timothylegg.com/R/lambda4.png > http://timothylegg.com/R/hello.png > > What am I doing wrong to get inconsistent results like this? I'm very new > to R and really hoping that this is a misunderstanding on my part. > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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 -- To UNSUBSCRIBE and more, see 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.
