Sometimes it is easiest to open a file using a file selection
widget. I keep this in my .Rprofile:
getOpenFile <- function(...){
require(tcltk)
return(tclvalue(tkgetOpenFile()))
}
With this you can find your file and open it with
rel <- read.table(getOpenFile(), quote="", header=FALSE, s
To drop empty factor levels from a subset, I use the following:
a.subset <- subset(dataset, Color!='BLUE')
ifac <- sapply(a.subset,is.factor)
a.subset[ifac] <- lapply(a.subset[ifac],factor)
Mike
> dataset
Color Score
1 RED10
2 RED13
3 RED12
4 WHITE22
5 WHITE27
6 WHIT
> Mark wrote:
> Currently my data is one experiment per row, but that's
> wasting space as most experiments only take 20% of the row
> and 80% of the row is filled with 0's. I might want to make
> the array more narrow and have a flag somewhere in the 1st
> 10 columns that
> "jim" == jim holtman writes:
> Is this what you want:
>> aggregate(x$Sim_1986, list(trunc(x$Latitude)), mean)
> Group.1 x 1 82 55.04276 2 83 60.26186 3 84 39.40297 4 85
> 22.12000
>>
You could also use cut to convert Latitude to a factor:
aggregate(x$Sim_1986, cut(
> "Manuel" == Manuel Morales writes:
> nls(y ~ a[fac]*x^b, start=list(a=c(1,1), b=0.25))
Did you mean a[f]?
nls(y ~ a[f]*x^b, start=list(a=c(1,1), b=0.25))
Mike
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> "Liaw," == Liaw, Andy writes:
> Are you sure that's dual atoms? AFAIK it has a single Atom
> N270 (single core) at 1.6GHz. With hyper-threading, you
> may see "two cpus".
Yep - that is exactly what is going on.
Mike
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cs, but then it is not physics. And if our goal is
to do physics, then we aught to get back to the lab and observe
reality some more. Which is where the fun is for many of us
scientists!
Regards, Mike
--
Michael A. Miller mmill...@iupui.edu
Department of Radiology
> "Jim" == Jim Lemon writes:
> I've got R on my little EeePC as well. Great for most jobs
> and I highly recommend a DC/DC convertor for plugging into
> your car's cigarette lighter to get around the crap battery
> problem.
I run R on my Eee PC as well - no problems there. A
>>>>> "Rolf" == Rolf Turner writes:
> On 4/03/2009, at 11:50 AM, Michael A. Miller wrote:
>> Sports scores are not statistics, they are measurements
>> (counts) of the number of times each team scores. There
>> is no
t not be significant, but relevant. I
> tend to argue the other way round though, in medical
> statistics.
Sports scores are not statistics, they are measurements (counts)
of the number of times each team scores. There is no sampling
and vanishingly small possibility of systematic error in th
> johnhj wrote:
> Can you also describe me how to describe the standard
> deviation of the boxplots/matrices ?
Try tapply:
> x <-read.table(file="test.txt")
> x$group <- rep(1:8, each=5)
> boxplot(V3~gruppe, data=x)
with(x, tapply(V3, gruppe, sd))
Mike
> Wacek Kusnierczyk <[EMAIL PROTECTED]> wrote:
> but it does seem to be a wrong decision for a language
> focused mostly with statistical computations and not
> computer science concerned with how to represent an
> integer.
The key word here is "computations." And after read
> "Peter" == Peter Dalgaard <[EMAIL PROTECTED]> writes:
> (Oddly enough, this issue hasn't come up in the 6+ years
> that the function has existed, and then it pops up twice
> with little over a week between, see the thread started by
> James Root on March 26.)
Odd indeed - th
> "James" == James Root <[EMAIL PROTECTED]> writes:
> Is there a way to run all paired t-tests where a paired
> t-test is run for every possible combination?
Sounds like pairwise.t.test is the sort of thing you are looking
for...
Mike
__
R
> "Valentin" == Valentin Bellassen <[EMAIL PROTECTED]> writes:
> Hello, I have a data frame with 3 vectors $x, $y, and
> $type. I would like to plot $x~$y and having different
> colors for the corresponding points, one for each level of
> $type. Would someone know how to do tha
ole in
my adopting R is the ability to create excellent graphics. Every
few years I used to do a search to find better tools for analysis
and graphics - I haven't felt the need to repeat that since I
found R.
Mike
--
Michael A. Miller [EMAIL PROTECTED]
Imagi
is to make something like scatterplot3d(lat, long,
> height) with points set according to a value.
This is a bit heretical for this list, but have you looked into
non-R things like paraview? (www.paraview.org)
Mike
--
Michael A. Miller [EMAIL PROTECTED]
> "Paul" == Paul Gilbert <[EMAIL PROTECTED]> writes:
> Gustaf Rydevik wrote:
>> The author also have some thought-provoking opinions on R
>> being no-good and that you should write everything in C
> People used to say assembler, that's progress.
>From the FORTRAN Preliminary
s sort of
thing all the time and it feels crufty to me.
Thanks, Mike
--
Michael A. Miller [EMAIL PROTECTED]
Imaging Sciences, Department of Radiology, IU School of Medicine
"ID","date","session"
1,05/24/2006,1
1,02/01/2007,2
1,
Does pairwise.t.test, with paste(group, quiz) as the factor, do
what you are looking for?
Regards, Mike
--
Michael A. Miller [EMAIL PROTECTED]
Imaging Sciences, Department of Radiology, IU School of Medicine
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