Displaying 14 results from an estimated 14 matches for "daehyok".
2004 Jun 20
9
A way to list only variables or functions?
I am curious if there is any way to list only variables or functions in
current environment, rather than listing all objects? Thanks.
--
Daehyok Shin (Peter)
Geography Department
Univ. of North Carolina-Chapel Hill
2004 Jun 20
9
A way to list only variables or functions?
I am curious if there is any way to list only variables or functions in
current environment, rather than listing all objects? Thanks.
--
Daehyok Shin (Peter)
Geography Department
Univ. of North Carolina-Chapel Hill
2004 Jul 10
6
where does R search when source()?
Exactly where does R search for foo.R if I type source("foo.R")?
Only from current working directory (same as getwd()), from all directories
specified by e.g. $PATH? Thanks.
Daehyok Shin
2004 Jul 10
6
where does R search when source()?
Exactly where does R search for foo.R if I type source("foo.R")?
Only from current working directory (same as getwd()), from all directories
specified by e.g. $PATH? Thanks.
Daehyok Shin
2004 Jun 07
7
Vectors of years, months, and days to dates?
....Date(ISOdate(years, months, days))
But, in this solution the ISOdate function converts the vectors into
characters,
which can cause serious performance and memory loss
when the vectors of years, months, and days are huge.
I am quite sure there is much better solution for it. What is it?
Thanks.
Daehyok Shin
2004 Apr 12
4
Only referenc copy when calling C routine?
...led code.
Normally these are copied before being passed in, and copied again to an R
list object when
the compiled code returns. If the arguments are given names, these are used
as names for
the components in the returned list object (but not passed to the compiled
code)."
Thanks in advance.
Daehyok Shin
2004 Apr 06
2
A package to read and write NetCDF?
I am looking for a package to read and write NetCDF files.
NetCDF package says it can only read, not write.
Another package for the standard binary file format?
Daehyok Shin
2004 Apr 20
1
Can't find memory.size()
I try memory.size function to find out available memory size,
but surprisingly R complains it can't find the function.
?memory.size also failed.
Is it not in the base library? If so, why can't my R find it?
I am using the binary 1.9.0 version for Mandrake 9.1.
Thanks in advance.
Daehyok Shin
Terrestrial Hydrological Ecosystem Modellers
Geography Department
University of North Carolina-Chapel Hill
sdhyok at email.unc.edu
"We can do no great things,
only small things with great love."
- Mother Teresa
2004 Jul 22
2
Files and classes in a package?
...s" is not defined when class
"aclass" is defined. To maintain source files effectively, I don?t want to
combine two files into one file or change their file names.
Surely, there may be elegant solutions for this somewhat trivial issue. But,
I can?t find it. Can you help me? Thanks.
Daehyok Shin
2004 Apr 07
3
More user-friendly error message needed.
...ing commands, I got a strange message.
> x<-data.frame(y=c(1:10))
> plot(x$z)
Error in xy.coords(x, y, xlabel, ylabel, log) :
x and y lengths differ
"The data frame, x, does not have a field named z."
may be better user-friendly message for this kind of common error.
Daehyok Shin
2004 Apr 07
3
More user-friendly error message needed.
...ing commands, I got a strange message.
> x<-data.frame(y=c(1:10))
> plot(x$z)
Error in xy.coords(x, y, xlabel, ylabel, log) :
x and y lengths differ
"The data frame, x, does not have a field named z."
may be better user-friendly message for this kind of common error.
Daehyok Shin
2004 Apr 05
1
Deep copy in R
...In the following R program, exactly when is the vector data deeply copied?
Thanks in advance.
1 v <- 1:10000
2 z <- f(v)
--------- function f ----------
3 f <- function(x) {
4 y = x
5 y[10] = 1
6 xf = date.frame(x=x)
7 xf$x[10] = 1
8 return(y)
}
Daehyok Shin
Terrestrial Hydrological Ecosystem Modellers
Geography Department
University of North Carolina-Chapel Hill
sdhyok at email.unc.edu
"We can do no great things,
only small things with great love."
- Mother Teresa
2004 Jul 12
0
Where does R search when source() ?
...s
| problem highly appreciated) (Spencer Graves)
| 11. Re: variable definition (Wolski)
| 12. Re: variable definition (Achim Zeileis)
| 13. Re: dyn.load() for windows (Utsav Boobna)
| 14. Re: dyn.load() for windows (Duncan Murdoch)
| 15. RE: where does R search when source()? (Shin, Daehyok)
| 16. Re: variable definition (Gabor Grothendieck)
| 17. Re: where does R search when source()? (Duncan Murdoch)
| 18. RE: where does R search when source()? (Shin, Daehyok)
| 19. How to bring an Splus object into R (Victoria Landsman)
| 20. RE: How to bring an Splus object into R (Liaw,...
2004 Jun 08
1
binary data
What's the preferred way in R for handling samples with binary data
(like chemical fingerprints encoded as hexadecimal strings with 0's and
1's indicating the absence or presence of chemical features) in methods
such as clustering and MDS. Do you always have to expand the fingerprint
data into individual variables (which can be a few hundreds) or can they
be used directly as binary