Displaying 16 results from an estimated 16 matches for "ncku".
2004 Oct 21
2
How to calculate a double integral ...?
Dear R-Friends,
How can I calculate a double integral like
\int_a^b \int_c^y g(x, y) dx dy
where a, b, c are constants, g(x, y), e.g.,
g(x, y) = tan(x + y).
I tried to nested integrate() and adapt(),
but none of them working, seemingly due to the
limits can not be specified constants.
Best regards,
C. Joseph Lu
Department of Statistics
National Cheng-Kung University
Voice:
2002 May 11
4
Is this a bug of pweibull()?
In rw1050, I found that
> pweibull(3:10, 2)
[1] 0.9998766 0.9999999 1.0000000 1.0000000 NaN NaN
[7] NaN NaN
Warning message:
NaNs produced in: pweibull(q, shape, scale, lower.tail, log.p)
more surprisingly,
> pweibull(3:10, 2.1)
[1] 0.9999566 1.0000000 1.0000000 -Inf NaN NaN
[7] NaN NaN
Warning message:
NaNs produced in: pweibull(q,
2000 Aug 04
1
xlab=expression(...) won't work.
...15
language R
However, xlab=expression(alpha) correctly shows up on x-label
by using previous version: R.1.0.1.
Hope this is not a bug for R.1.1.0!
Thanks for your help!
C. Joseph Lu
Department of Statistics
National Cheng-Kung University
Tainan, Taiwan
E-mail: cjlu at email.stat.ncku.edu.tw
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2000 Dec 20
1
Question about coplot() ...
Dear R-friends,
For the following data:
> xy
x y i
1 731 0.313 2
2 739 0.340 2
3 790 0.373 2
4 855 0.451 2
5 980 0.608 2
6 575 0.156 1
7 608 0.207 1
8 630 0.249 1
9 670 0.332 1
10 838 0.377 1
11 964 0.466 1
> coplot(y ~ x|i, data=xy)
coplot gives 3 panels, rather than 2, namely one for i=1 and one for
i=2.
Futhermore, when I extand data fram xy to have i=3 as follows:
2001 May 31
1
Why color changed in ps.file?
Dear R-friends,
When I selected "Save as postscript" via mouse left-button on the active
"R Graphics" window, those colored lines I made in the plot changed in
the saved postscript file, e.g., color blue becomes green, red becomes blue,
...
I have not changed any setting/options.
What's going on?
My version of R is
> version
_
platform i386-pc-mingw32
arch
2000 Dec 22
1
Found "answer" to my question on MTB's INDICATOR
Dear R-Friends,
Sorry to bother everyone with my earlier question:
"Do we have similar R function to work like Minitab's INDICATOR?"
I found the way to make things work: e.g.,
> x <- c(2,2,5,3,6,5,NA)
> model.matrix(~ factor(x) - 1)
factor(x)2 factor(x)3 factor(x)5 factor(x)6
1 1 0 0 0
2 1 0 0 0
2001 May 01
1
How to use install.packages()
Dear R-friends,
As the binary windows version of R being distributed,
what is the correct way to install contributed packages without
using winst.exe as before?
The answer in "R for Windows FAQ" says:
"You can install pre-compiled packages either from CRAN
or from a local .zip file by using install.packages: see its help page."
But the information available in
2002 Sep 08
2
Error on "Load source file" of iESS
Dear R and ESS users,
I got the following error when trying to load a source file
(smart.R in directory E:\R\)
into XEmacs through the menu iESS and "Load source file":
Error in file(file, "r") : unable to open connection
In addition: Warning message:
cannot open file `E:Rsmart.R'
It seems the slash "/" or "\" being missing, but I don't know
2009 Aug 01
3
All mail in mbox disappears when using Outlook
I thought I was imaging it but... I have a friend (honestly) that likes to
clear his inbox every month by copying older into a folder (e.g. June-2009).
Every month he complains that all the mail in the new folder has
disappeared. This has happened three times now, and he's sort-of-right. I
now believe it's a bug rather than him.
The setup is Dovecot 1.1.3 on FreeBSD 7.0 and the client is
2003 Jan 22
4
Samba-to-samba migration
Hi all,
I have a Samba box (Mandrake 8.1, Samba 2.2.2). I have another hard disc
that has Mandrake 9.0 + Samba 2.2.7 on it. I am looking to install this
other hard disc into the Mandrake 8.1 box and migrate everything over.
Do I need to do anything other than copy the contents of /etc/samba
(smb.conf, secrets.tdb etc) over to the new hard disc to ensure that our
Windows 2000 Pro workstations
2000 Dec 22
1
Do we have similar function to Minitab's INDICATOR?
Dear R-Friends,
Do we have a similar R function to work like Minitab's INDICATOR?
INDICATOR C2, C11-C15
C2 C11 C12 C13 C14 C15
2 1 0 0 0 0
2 1 0 0 0 0
5 ------> 0 0 0 1 0
3 0 1 0 0 0
6 0 0 0 0 1
5 0 0 0 1 0
* * * * *
2000 Dec 26
1
A "bug" in Rconsole?
Dear R-friends,
After change (and saved) font style to "bold" in GUI preferences from
menu-bar Edit,
R 1.2.0, Win98, the "buflines" in the file Rconsole changed to "bufiles"
and that causes
error in invoking R next time.
Is this a bug?
Merry Christmas & Best regards,
C. Joseph Lu
Department of Statistics
National Cheng-Kung University
Tainan, Taiwan
2010 Feb 03
1
About Markov Random Filed
Hello!!
Does there any packages can simulation data from Markov Random Field?
Thanks much
Ming Hung Chen
[[alternative HTML version deleted]]
2000 Dec 18
1
How can I get "A$Title"?
Dear R-friends,
I have whole bunch of objects, say, A, B, ..., Z,
all of them are "list" and haveing "Title" (a character string)
as their first element.
E.g.,
> A$Title
[1] "Airplane Component"
What I like to do is to find a way to printout all the Titles at one
time.
I tried the following:
> paste(LETTERS, "Title", sep="$") ->
2002 May 12
2
Is this a bug of pweibull()? (Follow up)
Please allow me to add just a little more about this:
nothing wrong with pweibull(), namely, the two cases I reported:
pweibull(3:10, 2) and pweibull(3:10, 2.1),
in rw1041 and earlier version.
I wonder this might just due to the change from rw1041 to rw1050,
however, I can't find anything relevant (seems to me) in the News
or Readme.
Thanks Sundar for the suggestion of using 1 -
2002 Aug 06
1
Questions about lexical scope
Dear R-users,
The numerical integration example given in Gentleman and Ihaka (2000),
"Lexical Scope and Statistical Computing," JCGS, 9, 491-508,
is very interesting and helpful in understanding how lexical scope
is about.
However, I got some questions that I just can't figure out.
First all, allow me to copy the two functions given by the authors:
midpoint <- function(f, a,