[R] Plotting in R

[Ko-Kang Wang]

Thank you very much.

No this is not an assignment.  I just want to test Benford's Law.  However it's
kind of interesting to see that the digit 1 does not appear as frequently as it
should be.

But anyway, thank you very much.

Martin Maechler wrote:

> >>>>> "KKWa" == Ko-Kang Wang <Ko-Kang at xtra.co.nz> writes:
>
>     KKWa> Here is a question that I don't know if it is possible to do in R:
>     KKWa> If I type:
>     >> log(1:1000)
>
>     KKWa> Then, I want to "take out" the first decimal place of each
>     KKWa> output, plot them based on their appearence frequencies.  Then
>     KKWa> take the second decimal place, do the same thing.
>
>     KKWa> Actually, I suspect I don't have to write a function to do this.
>     KKWa> Is it possible to do this?  Get the first decimal place of each
>     KKWa> answer to log(1:1000), then plot them?
>
> ## I hope this is not your home work assignment;
> ## The following is actually pretty neat .. (propria laus sordet)
>
> x <- 1:1000
>
> ndig <- 6
>
>  (ii <- as.integer(10^(ndig-1) * log(x)))[1:7]
>  (ci <- formatC(ii, flag="0", wid= ndig))[1:7]
>  cm <- t(sapply(ci, function(cc) strsplit(cc,NULL)[[1]]))
>  cm [1:7,]
>
> apply(cm, 2, table) #--> Nice tables
>
> # The plots :
> par(mfrow= c(3,2), lab = c(10,10,7))
> for(i in 1:ndig)
>     hist(as.integer(cm[,i]), breaks = -.5 + 0:10,
>          main = paste("Distribution of  ", i,"-th digit"))
>
> ----
> Martin Maechler <maechler at stat.math.ethz.ch>    http://stat.ethz.ch/~maechler/
> Seminar fuer Statistik, ETH-Zentrum  LEO D10    Leonhardstr. 27
> ETH (Federal Inst. Technology)  8092 Zurich     SWITZERLAND
> phone: x-41-1-632-3408          fax: ...-1228                   <><

--
-----------------------------------------------------------------------------------

 Ko-Kang Wang
 Undergraduate Student
 Computer Science/Statistics Double Major
 University of Auckland
 Auckland 1005
 New Zealand
-----------------------------------------------------------------------------------



-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-help-request at stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._