-contained, reproducible code.
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not be intended to
use the same data as used for prediction).
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.)
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, no, it isn't. Your SE formula only holds when var is the
only predictor. It would be more general to extract the SE from
coefficients(summary(lm.result)) (which also avoids having to pass var
as an argument).
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Email: pd
=FALSE)
}
}
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be safer to standardize on GMT
(just add tz=GMT to the as.POSIXct() call.)
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was generated. The argument to the default method is a matrix
and the row/col ordering determines the plot. If, in turn, it was
created by tabulating two factors, then factor level ordering (by
default alphabetic) applies to the table.
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only 3 females in 9 students, you
can get ambitious and set up the permutation distribution by enumerating
the choose(9,3)=84 possible outcomes.)
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seem to have gotten stuck in indecision
about which graphical toolkit to use. The Rcmdr has a data viewer (but
not editor) written with the Tcl/Tk interface, which might be a starting
point.
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a development package is missing, but exactly which one depends on your
particular flavour of Linux. In Fedora 13, it is here:
$ rpm -qf /usr/include/sqlext.h
unixODBC-devel-2.2.14-12.fc13.i686
so the unixODBC-devel package is required. In e.g. Ubuntu, it is -er-
somewhere else...
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commented, minimal, self-contained, reproducible code.
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, decreasing=FALSE),]
}
x - do.call(cbind, v)
write.table(x,clipboard,sep= ,col.names=NA) #export to Excell via
Ctrl-V
Just wondering, was anything wrong with
y1 - cbind(yearmonth[,-1], foo = NA)
names(y1) - names(yearmonth)
rbind(yearmonth, y1)
? (untested, of course)
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Peter Dalgaard
would take more than 16 observations!
I suspect that aov() is simply the wrong tool for these data. lm() will do it,
but watch out for the aliased effects.
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computers...)
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to an assignment function must be
called value, not z. Beware though, that the code may still not do
what you think it should do (e.g., the return value for an assignment
function REPLACES the first argument).
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that this at least partly
originates in times when we were less careful about computing the
appropriate tail of test statistic distributions. So one main point was
that a p-value of 0 could arise as 1 minus a number very close to 1.
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the sources. R News, 6(4):43-45,
October 2006. http://cran.r-project.org/doc/Rnews/
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-1 =
ca. 2 trillion elements.
Yes, you could be doing it wrong, but what is it? If the matrix is
sparse, there are sparse matrix tools around...
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paul s wrote:
On 07/14/2010 06:15 PM, Peter Dalgaard wrote:
A quick calculation reveals that a matrix of that size requires about
2.7 TERAbytes of storage, so I'm a bit confused as to how you might
expect to fit it into 16GB of RAM...
However, even with terabytes of memory, you would
version of) ESS.
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PLEASE do read
for(i in seq_along(dat))...)
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PLEASE do
write.csv) probably precludes changing anything at this point.
Notice that read.csv and friends do pass ... to read.table, so it is
easy to override the default setting.
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the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
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Solbjerg
. NA and NA are very different things
2. checkout is.na() and its help page
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).
r2string = expression(paste(r^2), = , r2);
Any help would be greatly appreciated,
Phil
r2string = substitute(r^2 == r2, list(r2=r2))
or bquote(r^2==.(r2))
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), list(x=quote(2+2
vs.
eval(substitute(I(x), list(x=expression(2+2
Nice example of a real-life case of this effect, hang on to it and we
can dig to the bottom of it some other time.
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) ==.
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ultimate goal is to
generate addition 20,000 data point from this empirical distribution
created
from the existing 10,000 data points.
thank you all in advance.
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...
with(airquality,table(Month))
Month
5 6 7 8 9
31 30 31 31 30
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an order argument is left as an
exercise, because I'm too lazy)
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) {
for (i in 2:order) {
body(ddf) - D(body(ddf),x)
}
}
ddf
}
Yes.
One thing: body() and body-() are relatively expensive operations, and only
really needed on the way in and the way out, so you might want to use a
temporary variable.
--
Peter
This mainly as a thumbs-up to sysadmins planning installation for the Fall
semester:
Only a small number of low-impact bugs have been found since the 2.11.1 release
so we have decided NOT to do a 2.11.2, but head straight for 2.12.0 some time
in October.
For the R Core Team
Peter Dalgaard
guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
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could (say) connect to the
R process and do a traceback showing where things get stuck.
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necessary here as the calculation of N
will automatically force evaluation of x, but forgetting to do it can
cause some rather magnificent grief otherwise because of R's lazy
evaluation mechanisms.)
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-1.00
[3,] -0.50 1.00 0.00 -0.50
[4,] -0.50 0.00 1.00 -0.50
So, no, you guessed incorrectly.
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the .ssd01 file from SAS at
all (I believe there's an Import menu somewhere). If you cannot, then R
won't be able to help, if you can, there's an obvious workaround in
saving it back as .sas7bdat.
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/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
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/listinfo/r-help
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Email
.
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for functions was
retained for compatibility.)
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of a giveaway...
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/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
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Email: pd
, that is; it's
not true for the identity link, obviously.)
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of the same order as that caused by the
discrete distribution of the response, so it is not like one method is
going to win by orders of magnitude.
Michael
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if an installation
terminates prematurely.
Do you have the appropriate permissions? It ia not clear to me whether
that is supposed to be a user-level library or a system one. Is your
user name ubuntu? (And is ubuntu really still shipping 2.9.x?)
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the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
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On Aug 10, 2010, at 10:13 AM, Romain Francois wrote:
rowSums( x == round(x) ) == ncol(x)
[1] TRUE FALSE TRUE FALSE
For later readability, I think I'd prefer
apply(x==round(x), 1, all)
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().
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has
if (achieved.alpha - alpha alpha/2) {
warning(Requested conf.level not achievable)
conf.level - 1 - signif(achieved.alpha, 2)
}
so I have to assume that the author has considered this with some care.
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,
but I'm afraid my time is too constrained at them moment for more than a
sideline view.)
-Michael
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whether I looked
at the Passing-Bablok paper at the time (1985!!) but my general
recollection is that this group of methods is littered with unstated
assumptions.)
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applied to (x-a1,y) and interpolate
between them.
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Biomarker Research Laboratory
3400 Spruce St. 7 Maloney
Philadelphia, PA 19104
tel. (215) 662-3413
On 2010-08-10 13:12, Peter Dalgaard wrote:
Michal Figurski wrote
guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
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of dimensions
On 8/12/2010 12:24 PM, peter dalgaard wrote:
On Aug 12, 2010, at 11:30 AM, Martin Tomko wrote:
c-scan(file=f,what=list(c(,(rep(integer(0),cols, skip=1)
m-matrix(c, nrow = rows, ncol=cols,byrow=TRUE);
for some reason I end up with a character matrix, which I don't want
) with matrix. Apologies to
naive questions, I am a newbie, in principle.
At this point I think you need to actually try my suggestions, and maybe
read the documentation again. Explaining how you have misunderstood the
documentation is not going to help...
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your solution certainly doesn't work!
I see 10 games in the 10th round, all involving team K. That's not how to
arrange a tournament!
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commented, minimal, self-contained, reproducible code.
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for (j in t0:(t0+n-1)) {
k - k+1
time[k] - (j-1) %% 10 + 1
}
}
Shouldn't there be 11 rounds? This way you have one team playing twice in every
round.
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Phone: (+45)38153501
On Aug 13, 2010, at 5:15 PM, peter dalgaard wrote:
On Aug 13, 2010, at 4:45 PM, Michael Bedward wrote:
teams - LETTERS[1:11]
matches - combn(teams, 2)
draw - data.frame(team1=matches[1,], team2=matches[2,])
# someone will know how to do this in one line...
time - numeric(55)
k - 0
-06
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that the differences
he observed are, shall we say, obscure!
Did you miss the point that the incorrect behaviour with na.exclude is
the default one? (Actually, na.omit is, but the effect is the same).
Arguably, t.test could just hardcode na.action=na.pass and begone with it.
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Peter Dalgaard
not telling us Possibly
that x is not a vector (a data frame, maybe?).
(And it's wrong is not one of the official error messages in any
language. Posting guide, reproducible code, etc.)
The whole thing is an inefficient way to do x - pmin(x,1), though.
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Peter Dalgaard
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, thus it need a TRUE/FALSE
is there any command to replace the NaN value with 1 in an efficient way?
Usually, you'd safeguard the if with if (is.na(x[i]) || x[i] 1)...
or if (!is.na(...) ...), depending on what you want.
BTW, notice also that pmin has an na.rm argument.
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to modify the step
function to do it, though; all the building blocks would seem to be there.
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().
pnorm(4*qnorm(.75), lower=F) # Q3 + 1.5 IQR = 4 Q3 since IQR = 2 Q3
[1] 0.003488302
gives the tail probabilities of .35%, and the rest is by definition.
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puzzled by the fact that there are 15DF in both cases, but different
average difference. This kind of suggests to me that maybe the x and y
are not computed correctly. (If only the ordering was scrambled, the
average difference should be the same, but the variance typically
inflated.)
--
Peter
and see what happens:
as.logical.factor - function(x)as.logical(levels(x))[x]
as.logical(factor(0))
[1] NA
as.logical(factor(FALSE))
[1] FALSE
as.logical(factor(TRUE))
[1] TRUE
as.logical(factor(1))
[1] NA
as.logical(0)
[1] NA
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, so there's not likely to be that much of a problem
with reinstating that behaviour.
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.
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, reproducible code.
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) because of
symmetry and the fact that the sum of all N ranks is fixed.)
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On 08/18/2010 06:20 PM, Joshua Wiley wrote:
matrix(1:4, nrow = 4, ncol = 1, dimnames = list(NULL, true value))
or even
cbind(true value=1:4)
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, it does look odd that mydat with dimensions 245x9 should
generate an 800M memory request. As others have suggested, perhaps mydat
is not what you think it should be...
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, ...
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enough, when I look fBasics in missing.
Please advise.
Norton antivirus software has been reported to cause this type of error.
Rcmdr has nothing to do with it per se (except that it generates a large
number of package installs).
--
Peter Dalgaard
Center for Statistics, Copenhagen Business
in the picture, beamer has trouble with verbatim
environments. You usually need
\begin{frame}[fragile]
No guarantees, but worth a try.
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read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
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these days... grin
-pd
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PLEASE do read
to upgrades
(but you may still need to update.packages()), but you obviously won't
have the possibility of distinguishing between multiple versions of R,
which can give both forwards and backwards compatibility problems.
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Phone
lapply is.)
For more intelligible and generalizable code, also consider
do.call(rbind, lapply(huge.list, function(x)x[4,]))
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-guide.html
and provide commented, minimal, self-contained, reproducible code.
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more info. Thank
you for your time,
Looks like you are trying to load a 64 bit module into a 32 bit R. Does
it work better with R64?
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share/texmf
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PLEASE do read the posting
roots and see if it makes the variances appear more stable
and perhaps improve on the normality. Then maybe just do a paired t-test.
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Peter Dalgaard
Center for Statistics, Copenhagen Business School
Solbjerg Plads 3, 2000 Frederiksberg, Denmark
Phone: (+45)38153501
Email: pd@cbs.dk Priv: pda
of depends on how far you came on the way to
infinity.
With the aggregated data, a perfect fit gives residuals of zero, but
with individual data, the 0's and 1's give negative and positive
residuals. Try
z - rep(0:1,5)
zz - cbind(5,5)
summary(glm(z~1, binomial))
summary(glm(zz~1, binomial))
--
Peter
just avoid going
too near it.
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Peter Dalgaard
Center for Statistics, Copenhagen Business School
Solbjerg Plads 3, 2000 Frederiksberg, Denmark
Phone: (+45)38153501
Email: pd@cbs.dk Priv: pda...@gmail.com
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),
runif(100,1,10));
colnames(d) - c(Month, Value);
bwplot(d$Month ~ d$Value);
or
...factor(1:12. labels=month.abb)...
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Peter Dalgaard
Center for Statistics, Copenhagen Business School
Solbjerg Plads 3, 2000 Frederiksberg, Denmark
Phone: (+45)38153501
Email: pd@cbs.dk Priv: pda
On 08/27/2010 08:38 PM, Bruce Johnson wrote:
Where do I find this function?
On Google, first hit...
Now really, If you can't find it, how would you expect anyone else to,
without any indication of what the function is supposed to do nor from
where you got the idea to look for it?
--
Peter
be
expected from the mailing lists.
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Peter Dalgaard
Center for Statistics, Copenhagen Business School
Phone: (+45)38153501
Email: pd@cbs.dk Priv: pda...@gmail.com
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PLEASE
)
Check demo(plotmath), 4th-to-last example.
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Peter Dalgaard
Center for Statistics, Copenhagen Business School
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at this point
is: What does:
with( tre, table(E,F) ) # show?
Yes. Also notice the pattern of missing values. A likely scenario for the error
would be to have E and F being something like gender and menarche, where
the latter is absent for boys.
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Peter Dalgaard
Center for Statistics
of luck.
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Peter Dalgaard
Center for Statistics, Copenhagen Business School
Solbjerg Plads 3, 2000 Frederiksberg, Denmark
Phone: (+45)38153501
Email: pd@cbs.dk Priv: pda...@gmail.com
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and 4 more symmetrically below zero.
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Peter Dalgaard
Center for Statistics, Copenhagen Business School
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, people do need to know what the symptoms are, and what you
did to upgrade?
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Peter Dalgaard
Center for Statistics, Copenhagen Business School
Phone: (+45)38153501
Email: pd@cbs.dk Priv: pda...@gmail.com
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be bypassing some red tape, and otherwise do the same.
--
Peter Dalgaard
Center for Statistics, Copenhagen Business School
Solbjerg Plads 3, 2000 Frederiksberg, Denmark
Phone: (+45)38153501
Email: pd@cbs.dk Priv: pda...@gmail.com
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