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 at 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.