[R] Summary shows wrong maximum
Oliver Czoske
czoske at astro.rug.nl
Tue Dec 5 15:07:32 CET 2006
On Mon, 4 Dec 2006, Uwe Ligges wrote:
> Sebastian Spaeth wrote:
> > Hi all,
> > I have a list with a numerical column "cum_hardreuses". By coincidence I
> > discovered this:
> >
> >> max(libs[,"cum_hardreuses"])
> > [1] 1793
> >
> >> summary(libs[,"cum_hardreuses"])
> > Min. 1st Qu. Median Mean 3rd Qu. Max.
> > 1 2 4 36 14 1790
> >
> > (note the max value of 1790) Ouch this is bad! Anything I can do to remedy
> > this? Known bug?
>
> No, it's a feature! See ?summary: printing is done up to 3 significant
> digits by default.
Unfortunately, '1790' is printed with *four* significant digits, not
three. The correct representation with three significant digits would have
to employ scientific notation, 1.79e3.
--
--------------------------------------------------------------
Oliver Czoske czoske at astro.rug.nl
Kapteyn Astronomical Institute Tel.: +31-50-363 4036
P.O.Box 800
9700 AV Groningen
Netherlands
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