Displaying 20 results from an estimated 4000 matches similar to: "How to generate all permutation of 0-1 sequences in R?"
2006 May 08
3
Non repetitive permutations/combinations of elements
Hello all,
I am trying to create a matrix of 1s and -1s without any repetitions for a
specified number of columns.
e.g. 1s and -1s for 3 columns can be done uniquely in 2^3 ways.
-1 -1 -1
-1 -1 1
-1 1 -1
-1 1 1
1 -1 -1
1 -1 1
1 1 -1
1 1 1
and for 4 columns in 2^4 ways and so on.
I finally used the function combn([0 1],3) that I found at the following link
2007 May 09
3
Removing a list of Objects
Hi,
I have a simple beginner's question on removing a list of
objects. Say I have objects C243.Daily1, C243.Daily2...C243.Daily5 in my
workspace. I'd like to remove these without using rm five times.
So I write.
> a <- list(paste("C243.Daily",sep="",1:5))
> rm(a)
Obviously this wouldn't work, as it would only remove the object a.
But is there any way
2006 Feb 15
1
power law
Dear list,
Does anyone know how to fit the power law distribution?
I have the empirical distribution and would like to check whether it fits
power law (with the power estimated from the data).
Any hints are appreciated
Best regards
Galina
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2007 Sep 14
6
replace NA value with 0
Hi,
how can I replace NA value with 0:
1991 217 119 103 109 137 202 283 240 146 NA
1992 270 174 149 144 166 239 278 237 275 NA
1993 146 111 104 89 98 131 153 148 175 NA
1994 177 123 146 124 121 200 266 191 240 106
1995 145 98 95 89 95 130 183 161 164 129
1996 145 98 89 90 93 138 158 131 161 161
1991 217 119 103 109 137 202 283 240 146 0
1992 270 174 149 144 166 239 278 237
2007 Feb 22
1
how to install a package in R on a linux machine?
I downloaded the tar.gz file from r-project website (and saved it in a local
directory) and wish to use the package in R.
But I am not sure how to use the install.packages command. I tried a few
times and still couldn't figure out the correct way to install this package.
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2008 Jan 05
2
Cumulative sum of vector
Hi,
Maybe I have not been looking in the right spot, but, I have not been
able to fine a command to automatically calculate the running
cumulative sum of a vector. Is there such a command?
Example of current code:
> eig$values
[1] 678.365651 6.769697 2.853783
> prop<-eig$values/sum(eig$values)
> prop
[1] 0.986012163 0.009839832 0.004148005
>
2006 Jan 27
3
substituting an object not found
Is there any function in R like
is.not.found(x, y)
meaning if you can't find object x, then use object
y??
Mikkel Grum
2006 Apr 20
1
sna package: how to import data in linked list format
Hello,
I have several "linked list" format network files that I'd like to read into R. Although I found a function to export files in .dl format, I could not find a function to read files in such format.
Is there any quick way to read linked-list format files into R?
Thank you very much.
Jorge Colazo
PhD Student
University of Western Ontario
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2006 Apr 23
1
sna package: how to use dataframes
Hi,
I an new to R and I realize this may be a silly question, but I searched the manuals and the list archives and can't find the answer.
When I read data from R I get a dataframe with labels for rows and columns. SNA however asks for pure adjacency matrices, and if I try to use the dataframe gives an error message.
What should do?
Thanks a lot
Jorge A. Colazo
U. of Western Ontario
2006 Apr 23
1
converting similarity matrix formats
Dear all,
I am using a program that generates similarity matrices in the following
non-redundant pairwise format.
a b 0.4
a c 0.5
a d 0.3
b c 0.9
b d 0.6
c d 0.2
matrix(c('a','a','a','b','b','c','b','c','d','c','d','d',.4,.5,.3,.9,.6,.2),byrow=F,nrow=6)
I would like to convert this to a
2006 Apr 28
1
displaying numbers not in scientific notation
Sorry for asking such a simple question, but I couldn't find the
answer through a search...
How can I get R to show me the values of estimates *not* in scientific notation?
When I use summary() after using lm() I am getting numbers like
4.485107e-01, when what I want to see is 0.4485....
Thanks,
Brian
2006 Jun 15
1
more function in R?
I'm an R newbie and I just have a simple question.
I'm using interactive R on a linux box and I'm trying to find out if there's
a more or a less function. The data I want to look at is larger then my
screen size and all I end up seeing is the last fews line of data. Is there
a way that I can paginate through the data and the results of my summary
functions?
thanks,
Heidi
2006 Jun 29
2
R server
Hi,
I just installed R in Windows, it seems to me that R is a standalone
desktop application. Do you know if R has its server version which could
handle multi-users, have several distinct R sessions and their own
variables in Unix or Windows?
I saw OpenStatServer, RStatServer available, can those handle
multi-sessions?
Thanks
Mike
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2006 Aug 22
2
Rgraphviz installation Problem
Dear Robert,
Thanks for your time.
I have downloaded Rgraphviz (windows binary) from www.bioconductor.org
and put inside R2.3.0 library then i installed from the local zip
its says package 'graph' couldnot be loaded.
Am i doing the installation correctly? Still the new user.
Can you guide me sir?
JJ
--
Lecturer J. Joshua Thomas
KDU College Penang Campus
Research Student,
University
2006 Sep 09
1
clustering coefficient
Hi all,
I've been looking for a function that calculates "clustering coefficient" either Newman's or Wattson's.
I have found different functions to calculate different "cluster" but I haven't found yet anything for clustering coefficient, it might be under a different name.
Any ideas?
Cuau
---------------------------------
Get your email and more,
2006 Oct 31
2
information about sna packages
Hello,
I'm a student who want to use the R social network analysis package. I have
a question: can this package analyse dynamical networks (network changing
over time)? I didn't find this functionality in the package's user manual.
Thank you
Davide
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2007 Jan 25
2
Unable to install gtkDevice ...
Hello!
I am trying to install gtkDevice package, but without success. It is
complaining about:
* Installing *source* package 'gtkDevice' ...
checking for gtk-config... no
checking for gtk12-config... no
ERROR: Cannot find gtk-config.
I am using Ubuntu 6.06, and I cannot find that package in the
repositories. Is there a remedy of any kind? What can I do?
Best,
Petar M.
2007 Feb 08
2
Defining functions in separate file...
Hello, is it possible to define functions in a file, say, myfunctions.R,
and import them into R -- into the top-level namespace? I've seen in the
documentation that you can create packages, but this seems very
heavy-duty, as it requires me to createa subdirectory, and various other
files.
TIA
Martin
2007 May 08
2
draw two plots on a single panel
Hi,
I have 2 dataset,
plot(data1)
plot(data2),
but it comes as two graphs, can I draw both on a single panel so I can
compare them?
Thanks
Pat
2007 Jul 05
1
generating lower triangular matrix
Hi,
I would like to generate below triangular matrix for some a.
0
0
0
0
0
0
1
0
0
0
0
0
a
1
0
0
0
0
a^2
a
1
0
0
0
a^3
a^2
a
1
0
0
a^4
a^3
a^2
a
1
0
What's an efficient way to do this? (this matrix being KxK, K very
large)
Thanks
Zava
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