Displaying 20 results from an estimated 1000 matches similar to: "Column name expansion in data.frame()"
2014 Nov 30
1
Using FPP preprocessor for Fortran Code
Dear R Developers,
For package seriation I use Fortran code. I recently got a request to add
#if defined(__ICC) || defined(__INTEL_COMPILER)
USE IFPORT
#endif
to the code since the Intel Fortran compiler otherwise has problems with
rand(). However, to enable the FPP preprocessor I have to either add a
compiler flag (-cpp for gFortran) which is possibly not portable or
change the
2015 Mar 20
0
RFC: Matrix package: Matrix products (%*%, crossprod, tcrossprod) involving "nsparseMatrix" aka sparse pattern matrices
Hi Martin,
package arules heavily relies on ngCMatrix and uses multiplication and
addition for logical operations. I think it makes sense that in a mixed
operation with one dgCMatrix and one ngCMatrix the ngCMatrix should be
"promoted" to a dgCMatrix.
The current behavior of %*% and friends is in deed confusing:
> m <- matrix(sample(c(0,1), 5*5, replace=TRUE), nrow=5)
>
2010 Nov 10
1
clustering association rules
Hello.
I have a general question regarding to clustering of association rules.
According to http://cran.r-project.org/web/packages/arules/vignettes/arules.pdf
"4.7 Distance based clustering transactions and associations" there is possibility for creating clusters of association rules.
I do not understand, how I have to interpret clusters of rules.
Let us have next association rules and
2010 May 30
1
solve_TSP ignores control data, or I'm reading the help doc incorrectly.
I read the documentation below to mean that:
solve_TSP( tsp_input, '2-opt', rep=99 )
will use the 2-opt method on the tsp_input variable
99 times.
Catch: I get an "unused input" error.
Q: Am I reading the docs (Item 1, below) correctly or
is this a problem with solve_TSP ignoring its inputs
(Item 2, below).
Item 1: solve_TSP doc:
> library(TSP)
>
2011 Aug 19
2
Multiple Traveling Salesperson Problem
While R has library TSP to help solve traveling salesperson problems, does
anyone know if it has any libraries to help solve multiple traveling
salesperson problems? For instance, suppose one is planning school bus
routes and one has multiple buses. Thank you for your time.
--
View this message in context:
2011 Aug 18
1
convert a matrix to binaryMatrix in Recommenderlab
Does anyone have experience about how to convert a matrix to binaryMatrix using Recommenderlab package?
Thanks,
Jing
[[alternative HTML version deleted]]
2010 Dec 20
2
package "arules" - 'transpose' of the transactions
Suppose this is my list of transactions:
set.seed(200)
tran=random.transactions(100,3)
inspect(tran)
items transactionID
1 {item80} trans1
2 {item8,
item20} trans2
3 {item28} trans3
I want to get the 'transpose' of the data, i.e.
transactionID items
1 {trans2} item8
2 {trans2} item20
3 {trans3} item28
4 {trans1} item80
I
2011 Aug 19
3
ATSP to TSP reformulation
Greetings,
I am having trouble getting the function reformulate_ATSP_as_TSP to work for
me. I have provided a simple example of some of the code I've been using.
In particular, I'm not sure why I'm getting the error
"Error in dimnames(tsp) <- list(lab, lab) :
length of 'dimnames' [1] not equal to array extent"
since I created the object ATSP with a valid
2015 Mar 19
6
RFC: Matrix package: Matrix products (%*%, crossprod, tcrossprod) involving "nsparseMatrix" aka sparse pattern matrices
This is a Request For Comment, also BCCed to 390 package maintainers
of reverse dependencies of the Matrix package.
Most users and package authors working with our 'Matrix' package will
be using it for numerical computations, and so will be using
"dMatrix" (d : double precision) matrix objects M, and indirectly, e.g., for
M >= c will also use "lMatrix" (l:
2003 Oct 23
7
generic algorithm
Dear all,
Is there any generic algorithm code for optimization implemented in R? I
searched without success.
Thanks,
--
Zhu Wang
Statistical Science Department
Southern Methodist University
Phone: (214)768-2453
Fax: (214)768-4035
Email: zhuw at mail.smu.edu
2007 Oct 31
2
survey weights in sample with replacement
>> Hi,
I am trying to draw a random sample from an household survey with sample weight. Is there any function in R or Splus which allows this.
Regards,
*******************************************************
Mehtabul Azam
Department of Economics
Southern Methodist University
Dallas TX 75275-0496
Tel: (214) 214 938 3906
Email: mazam at smu.edu <mailto:mazam at smu.edu>
2004 Apr 06
4
missing values for mda package
Dear helpers,
I am trying to use the mda package downloaded from the R website, but
the data set has missing values so I got an error message. Should I
manually handle these missing values? I was trying to read the documents
to specify any option related to missing values, but I did not find it.
Please forgive me if I ignore something obvious.
Thanks,
Zhu Wang
Statistical Science Department
2003 Feb 03
0
FW: unable to open connection
Thanks to Brian D. Ripley and Uwe Ligges. It works now.
Zhu Wang
Statistical Science Department
Southern Methodist University
3225 Daniel Avenue, Heroy 123
Dallas, TX 75275
Tel: (214)768-2453
Fax: (214)768-4035
>
>
> > -----Original Message-----
> > From: Uwe Ligges [mailto:ligges at statistik.uni-dortmund.de]
> > Sent: Sunday, February 02, 2003 5:22 AM
>
2003 Jun 19
1
What's wrong with ar for my data?
Dear helpers,
When I use ar to fit the data with length 180, I have the following
error:
ar(x,method="burg")
Error in acf(x, type = "covariance",lag.max=order,plot=FALSE):
lag.max must be at least 1
If I use
ar(x), then I have
Call (x=x)
order selected 0 sigma^2 estimated as 5374
Obviously I missed some points for using ar.
This is R 1.7.0 under Redhat Linux
2003 Jun 09
1
Questions for package ts prediction
Dear helpers,
I am trying to write a function to return prediction values using
package ts. I have written three different versions since I am not sure
what's wrong with my func2. func and func1 return the same results.But
func1 and func2 don't. In particular, the only difference between
"func1" and "func2" is the function variable name being y and data,
respectively.
2004 May 31
1
Question about building library and BLAS
Dear helpers,
I am trying to create a library which uses some Fortran source files and Lapack and Blas
subroutines. The Fortran source files from the original author contain subroutines
isamax.f, sgefa.f and sgesl.f, which are part of BLAS subroutines on my Linux computer,
but maybe different (old) versions. So in addition to these subroutines, there are other
Lapack and Blas subroutines
2006 Sep 20
0
Call for Abstracts: Tools for Intelligent Data Analysis (GfKl 07)
*** Call for Abstracts ***
Tools for Intelligent Data Analysis
Session at the 31th Annual Conference of the German Classification Society
(GfKl): Data Analysis, Machine Learning, and Applications
March 7-9, 2007
University of Freiburg
Providing innovative tools for data analysis is extremely important for making
techniques available for a broader community. In the session 'Tools for
2009 Jul 20
1
S4 method dispatch with inheritance
Hi,
I'm trying to create a new S4 class (myMatrix) which for now just
extends dgCMatrix (from package Matrix). Then I want to use "[" which is
defined in Matrix.
Out of the box with "[" (defined in Matrix) I lose the class information
and the result is an object of class dgCMatrix. If I specify a
"["-method for myMatrix, it is not used because a signature
2013 Nov 13
1
can't auth against more then 1 domain
I have 2 samba servers. One with centos5+samba 3.033 that has been in
service for a few years now. I have installed a centos6+samba 3.6.9. I
followed the how-to I did with the first one, copied over the krb5.conf
and smb.conf from the working server and all seemed to go well. It is a
member server of a window AD. We have 2 DC's that are part of the same
forest: SEAS and SEAS-S. I
2004 Jun 09
2
Building package on Windows: No rule to make target '-llapack'
Dear all,
I have a problem to build a package on Windows XP while there is no problem on Linux. The Makefile is something like:
###########
LIBNAME=cts
PKG_LIBS = $(LAPACK_LIBS) $(BLAS_LIBS) $(FLIBS)
OBJS=file1.o ... file20.o -llapack -lblas
$(LIBNAME)$(SHLIB_EXT): $(OBJS)
$(SHLIB_LD) $(SHLIB_LDFLAGS) -o $@ $(OBJS) $(FLIBS)
clean:
@rm -f *.o *.$(SHLIB_EXT)
realclean: clean