similar to: Multiple regression

I am faced with a situation wherein I have to use multiple lapply's. The pseudo-code could be approximated to something as below: For each X from i=1 to n For each Y based on j=1 to m For each F from 1 to f Do some calculation based on Fij Store Xi,Yj = Fij End For F End for Y End for X Is there anyway to optimize the processing logic further? I *guess* using the multiple lapply

Dear All, Is there any simple way to way to produce "rank", for a given list, but in a descending order? E.G: x = list(a=c(1,5,2,4)); rank(x$a); produces 1,4,2,3 However I am looking for a way to generate (4,1,3,2). It would be particularly nice if the proposed solution has all the niceties of rank function (like NA handling and ties.method functionality) TIA Manoj

Hello All, I am new to R. I am trying to process this huge data set of matrix containing four columns, say x1, x2, x3, x4 and n number of rows. I want to aggregate the matrix by x1 and perform statistic based on columns x2, x3, x4. I tried aggregate function but it gave me memory allocation error (which I am not surprised), so I ended up performing a for loop based on x1 and

Dear All, Is it possible to perform OLS using C code? I am trying to optimize a n-period "moving window" OLS on a huge dataset hence was wondering if such a thing is possible. Ideally the solution that I am looking for would involve a C-code accepting two float arrays and returning back computed parameters such as t-stat, coefficient etc. I have glanced thru the FAQ's and tried

Hi, I am trying to determine the number of units in the hidden layer and the decay rate using the CVnn2 script found in MASS directory (reference: pg 348,MASS-4). The model that I am using is in the form of Y ~ X1 + X2 + X3... + X11 and the underlying data is time-series in nature. I found the MASS and nnet package extremely useful (many thanks to the contributors). However I am getting

Hi All, I am trying to write a c function to optimize loop processing. Having read the R extension and trying out a few samples I was pretty comfortable with the basics. However, I am wondering if there is anyway to call tseries functions like adf.test or po.test from within c function. Any pointers/ code sample would be greatly appreciated. Thank you. Manoj

?readline HTH -----Original Message----- From: r-help-bounces at stat.math.ethz.ch [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Neil Leonard Sent: Friday, August 27, 2004 2:04 PM To: r-help at stat.math.ethz.ch Subject: [R] Keyboard input into functions Hi, Does anybody know if it is possible to have keyboard input into functions? Kind of like 'scanf()' in C. I want to

> > After running a MANOVA test, I used univariate Fs in order to see > which IV(s) was contributing the difference. > However, I have been critised about it, > and the reason I was given is: > > "MANOVA allows you to explore multiple associations but > does not excuse you from tracing out the causal relationships > for each variable. This does

Hi, I am trying to understand the alternative methods that are available for selecting variables in a regression without simply imposing my own bias (having "good judgement"). The methods implimented in leaps and step and stepAIC seem to fall into the general class of stepwise procedures. But these are commonly condemmed for inducing overfitting. In Hastie, Tibshirani and Friedman

A few general comments about stepwiseAIC and a suggestion of how to select models a) Apart form the problem, that stepwise selection is not a garanty to get the best model, you need to have a lot of data to avoid overfitting if your model includes 7 parameter plus interactions (> 10 observations per parameter is what you are ideally looking for). b) Have a look at Anderson and Burnham's

hello sir, in llvm installation ./configure command worked properly but while giving make -j 4 command in ubuntu everything got build properly but at last it showed error as llvm[4]: Linking Debug+Asserts executable clang collect2: ld terminated with signal 9 [Killed] make[4]: *** [/home/manoj/Desktop/LLVM/ build/Debug+Asserts/bin/clang] Error 1 make[4]: Leaving directory

Hi all, I tried to compile the theora source with VS2005. But it asked for the ogg library. error message is as follow. **************************************************************************** Error 1 fatal error C1083: Cannot open include file: 'ogg/ogg.h': No such file or directory c:\Documents and Settings\Manoj\Desktop\libtheora-1.0beta3\include\theora\codec.h 64 Error

Hi, I am trying to install CentOS on an Opensolaris Dom0. virt-install fails with an error in virDomainCreateLinux(). Is this a known issue? Am I missing some step? manoj@mowgli:~$ uname -a SunOS mowgli 5.11 snv_101b i86pc i386 i86xpv Solaris manoj@mowgli:~$ pfexec virt-install What is the name of your virtual machine? centos How much RAM should be allocated (in megabytes)? 512 What would

Disclaimer first: I only heard about R fairly recently, so I apologize if this is either a simple or impossible request, but R looked like it might be a good framework for this sort of thing... Is it possible to write a script to run stepwise multinomial regressions on many *dependent* variables, and then compare results to a validation data set (e.g., Chow test)? Essentially, automate the

hello sir, ./configure worked properly but while giving make -j 2 command in ubuntu everything got build properly but at last it showed error as llvm[4]: Linking Debug+Asserts executable clang collect2: ld terminated with signal 9 [Killed] make[4]: *** [/home/manoj/Desktop/LLVM/ build/Debug+Asserts/bin/clang] Error 1 make[4]: Leaving directory

hello sir, ./configure worked properly but while giving make -j 2 command in ubuntu everything got build properly but at last it showed error as llvm[4]: Linking Debug+Asserts executable clang collect2: ld terminated with signal 9 [Killed] make[4]: *** [/home/manoj/Desktop/LLVM/build/Debug+Asserts/bin/clang] Error 1 make[4]: Leaving directory `/home/manoj/Desktop/LLVM/

You should use make -j with a number lower than 4, it looks like you ran out of memory when linking. On 10 February 2013 15:41, Manoj C <manoj.chinthala at gmail.com> wrote: > hello sir, > in llvm installation ./configure command worked properly but while > giving > make -j 4 command in ubuntu > > everything got build properly but at last it showed error as > >

** Low Priority ** Hi Volker, This is regarding your fix on recycled PIDs. I am an NCP developer from Novell and we use libsmbsharemodes library from Samba for Cross Protocols Locks between NCP, Samba and others. I have few queries regarding your fix. In your fix, you have added a new field called 'unique_id' in the server_id structure and we need to pass this in our call to samba

Dear All, For any given vector, I want to extract a sub-vector such that the new vector skips all zeros, if any , at the start of vector. Is it possible to achieve this w/o looping? E.G : > x = c(0,0,1,2,3,4,5,0,0,8,9) > y = somefunc(x); > y [1] 1 2 3 4 5 0 0 8 9 In the example above, I want to skip the two

Hi, I am using ubuntu 9.04. I have installed ubuntu 9.04. And then downloaded wine-1.0.1.tar.bz2 from winhq/download site. Then follow following steps: 1) Untar files: tar jxvf wine-1.0.1.tar.bz2 2) cd wine-1.0.1/ 3) ./tools/wineinstall During step three, following error comes: ******************************************** make[2]: Leaving directory `/home/manoj/wine-1.0.1/dlls/fusion'