Displaying 9 results from an estimated 9 matches for "dongfeng".
2004 Feb 24
6
be careful: using attach in R functions
...hree=0.4)
attach(theta)
x <- c(one, two, three)
sample(x, 1)
}
test <- function(n=400){
timeu <- numeric(n)
for(i in seq(n)){
timeu[i] <-
system.time({
resi <- f()
})[3]
}
plot(timeu)
}
test()
##############################
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡Li Dongfeng
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ldf-nospacm at math.pku.edu.cn
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡2004-02-24
2001 Jul 16
1
polyroot() (PR#751)
In a bug report from Nov.28 2000, Li Dongfeng writes:
-----
I have found that the polyroot()
function in R-1.1.1(both solaris
and Win32 version) gives totally
incorrect result. Here is the offending
code:
# Polyroot bug report:
# from R-1.1.1
> sort(abs(polyroot(c(1,-2,1,0,0,0,0,0,0,0,0,0,-2,5,-2,0,0,0,0,0,0,0,0,0,1,-2))))
[1] 0.8758259...
1999 Sep 09
1
read.table bug
...ntaining:
"Smith, John", 120, 90
"Thomson, Peter", 110, 85
there are 3 variables in it. If we use
x <- read.table("tmp.txt", sep=",")
to read the data to a data.frame,
the result will be 4 columns.
Splus 4.0 have no problem with this kind
of data.
Li Dongfeng
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1999 Sep 09
1
read.table bug
...ntaining:
"Smith, John", 120, 90
"Thomson, Peter", 110, 85
there are 3 variables in it. If we use
x <- read.table("tmp.txt", sep=",")
to read the data to a data.frame,
the result will be 4 columns.
Splus 4.0 have no problem with this kind
of data.
Li Dongfeng
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
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2007 Feb 14
1
lattice graphics and source()
...;- x^2
xyplot(y ~ x)
}
f()
Then I run the program:
> source("myprog.r")
but nothing happens. Manully run f() at the command line:
> f()
then the figure is shown. This seems to be a bug only associated with
lattice graphics, the old style plots do not exibit these behavior.
Dongfeng Li
2000 Aug 23
1
png device on Solaris
...got this error.
Error in png() : No png support in this version of R
Can anyone tell me how to compile png support
on solaris/unix? The new bitmap() device already
does what I need but it requires ghostscript program
installed.
Please respond to my email in addition to the list.
Thanks.
Li Dongfeng ldf at statms.stat.pku.edu.cn
Dept Statistics http://statms.stat.pku.edu.cn/~ldf
Peking University
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
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Send "info", &qu...
1999 Sep 06
0
suggestion: postscript paper=user
...ect(we need landscape). I don't know
how to make the image size smaller and
rotating 90 degrees with ghostscript. I had to
patch the R source(src/unix/devPS.c) myself
to add a paper size. If R provide a paper="user "
option for the postscript device, things would be
much easier.
Li Dongfeng
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
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1999 Sep 06
0
suggestion: postscript paper=user
...ect(we need landscape). I don't know
how to make the image size smaller and
rotating 90 degrees with ghostscript. I had to
patch the R source(src/unix/devPS.c) myself
to add a paper size. If R provide a paper="user "
option for the postscript device, things would be
much easier.
Li Dongfeng
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !) To: r-devel-request@stat...
1999 Sep 16
1
Java/C interface with R
Hi,
I'm rarther curious if it is possible to interface C or Java GUIs with
the underlying R statistical engine. SPLUS has something like this in
S+SDK.
Lionel
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