Hi Petr, a couple of comments inserted below.
Petr PIKAL wrote:
Hi
r-help-boun...@r-project.org napsal dne 04.02.2010 11:31:51:
Petr PIKAL wrote:
Hi
so do you think I shall fire a bug announcement? I think I rather wait
to
see if there is some reaction from others. Maybe, there is some re
On Thu, 4 Feb 2010 12:04:32 +0100 Karl Ove Hufthammer
wrote:
> It's not exactly a bug, since 'median' is not documented to work on data
> frames (use 'sapply' or 'apply' for that),
Note that this is slightly more complicated than what would appear at
first sight. Both 'sapply' and 'apply' work
On Thu, 4 Feb 2010 09:32:15 +0100 Petr PIKAL
wrote:
> > median(df1)
> [1] 6.5 10.5
>
> Rather weird, AFAIK there shall not be an issue with data frame at least I
> did not find any in help page.
It's not exactly a bug, since 'median' is not documented to work on data
frames (use 'sapply' or
Hi
r-help-boun...@r-project.org napsal dne 04.02.2010 11:31:51:
> Petr PIKAL wrote:
> > Hi
> >
> > so do you think I shall fire a bug announcement? I think I rather wait
to
> > see if there is some reaction from others. Maybe, there is some reason
> > behind such behaviour. Those simple stat
On 04-Feb-10 09:58:36, Petr PIKAL wrote:
> Hi
> so do you think I shall fire a bug announcement? I think I rather
> wait to see if there is some reaction from others. Maybe, there
> is some reason behind such behaviour. Those simple statistics tend
> to behave differently when operating on data.fra
Petr PIKAL wrote:
Hi
so do you think I shall fire a bug announcement? I think I rather wait to
see if there is some reaction from others. Maybe, there is some reason
behind such behaviour. Those simple statistics tend to behave differently
when operating on data.frames so median is not such a
Hi
so do you think I shall fire a bug announcement? I think I rather wait to
see if there is some reaction from others. Maybe, there is some reason
behind such behaviour. Those simple statistics tend to behave differently
when operating on data.frames so median is not such a huge surprise.
see
Well, I get the same as Petr with R version 2.10.0 (2009-10-26)
on Linux.
To me, this suggests that median is broken! Any user would,
a priori, expect that median() should operate in exactly
the same way as mean(). To extend Petr's example:
mat <- matrix(1:32, 4,8)
df1 <- data.frame(mat)
m
Hi
Sorry, as many Windows users I forgot to mention version and platform
> version
_
platform i386-pc-mingw32
arch i386
os mingw32
system i386, mingw32
status Under development (unstable)
major 2
minor 11.0
Linux 2.9.0 gives:
> median(df1)
[1] 34
Ever stranger...
mario
Petr PIKAL wrote:
> During some experimentation in preparing R lessons I encountered this
> behaviour which I can not explain fully
>
> mat <- matrix(1:16, 4,4)
> df1 <- data.frame(mat)
>
>> mean(df1)
> X1 X2
During some experimentation in preparing R lessons I encountered this
behaviour which I can not explain fully
mat <- matrix(1:16, 4,4)
df1 <- data.frame(mat)
> mean(df1)
X1 X2 X3 X4
2.5 6.5 10.5 14.5
Expected, documented
> median(df1)
[1] 6.5 10.5
Rather weird, AFAIK there shall
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