[R] unexpected breaks in hist

[David White]

Hello R-list,


I've been using hist to plot histograms of some data, but I get variable
numbers of bins. I understood from reading the help file that breaks will
set the number of bins. Please correct me if I'm wrong.
I'm plotting measures from subsets of a larger data set. Depending on the
data subset the number of bins varies despite having set breaks to 5 in
all cases.

See commands below. (BTW I'm using R1.2.2 on SunSolaris)

Thanks,

David

hist(allvariances[allvariances$type %in% "ku",3], breaks=5, main="ku
variance histogram")
    par(new=FALSE)
    hist(allvariances[allvariances$type %in% "ki",3], breaks=5, main="ki
variance histogram")
    par(new=FALSE)
    hist(allvariances[allvariances$type %in% "tu",3], breaks=5, main="tu
variance histogram")
    par(new=FALSE)
    hist(allvariances[allvariances$type %in% "ti",3], breaks=5, main="ti
variance histogram")


S. David White
sdavidwhite at bigfoot.com
Columbus, Ohio

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