similar to: accessing arrays

Displaying 20 results from an estimated 500 matches similar to: "accessing arrays"

2007 Nov 28
2
alternatives to traditional least squares method in linear regression ?
Dear list, I have encountered a special case for searching a linear regression where I'm not satisfied with the results obtained using the traditional least squares method (sometimes called OLS) for estimating/optimizing the residues to the regression line (see code below). Basically, a group of my x-y data are a bit off the diagonal line (in my case the diagonal represents the ideal or
2008 Sep 03
2
optimizing speed of calculation (recursive product)
Dear list, I'm wondering how to optimize functions/processes like the one shown below (which simplifies something we're trying to do with very large datasets). In many cases I've noticed that using apply, sapply etc can help speeding up processes, but in this case I don't see how I could do so. a <- runif(10000000,0.5,1.6) C <- 2 M <- 10000000 system.time( for (i in
2009 Sep 24
1
how to make a function recognize the name of an object/vector given as argument
Dear guRus, I'd like to learn how to make a function recognize the name of an object/vector given as argument If I have : testFun <- function(x,y) plot(x,y, main=paste("plot of",names(x),"and",names(y)) ) # this just a simple example ... a1 <- 5:8 b1 <- 9:6 testFun(a1,b1) # Returns the plot, but not the names of the objects/vectors given as arguments, # but
2009 Mar 10
1
require() is not giving TRUE / FALSE statements ?
Dear list, ?require says : "... |require| is designed for use inside other functions; it returns |FALSE| and gives a warning (rather than an error as |library()| does by default) if the package does not exist ..." However when I run the following code I don't get any TRUE / FALSE statements (but the warning only). Since I want to test from inside of a function if a given package
2009 Feb 16
1
Don't find a package !
Hi, Please could somebody has any information about the following package: IlluminaGUI, published here: http://bioinformatics.oxfordjournals.org/cgi/content/abstract/btm101v1 The link given in the article is dead and authors doesn't reply ! Is there someone who uses it ? Thank you very much for help -- View this message in context:
2009 Apr 14
1
using Sweave, how to save a plot in a given size
Hi, I'm trying to realise a repport with R and Latex (TeXnicCenter and Miktex for Windows) using Sweave(). I'd like to save my plots in a given size. How can I do that ? The code is : \SweaveOpts{prefix.string = figs/plot, eps = FALSE, pdf = TRUE} <<partI, echo=FALSE ,fig=TRUE, include=FALSE>>= plotFunction() @ \includepdf[pages=-]{figs/plot-partI} When I use
2007 Jan 31
1
problem with compilation of R on Solaris 10 in x86
Dear List, we're trying to install R on Solaris10 on a x86 (amd64). During the installation we pass successfully the ./configure but we get an error through the built-in function "_isnan" which we see existing in /lib When passing the command "make" we get : gcc -std=gnu99 -I../../src/extra/zlib -I../../src/extra/bzip2 -I../../src/extra/pcre -I. -I../../src/include
2010 Dec 21
2
replace values of a table !!!
Dear all, Dear all, I am a relatively new user. I have an ascii file with 550 rows and 400 columns. The file contain values ranging from 1 to 2000 and some values with -9999. I want to generate a new file where the -9999 values are replaced with 0 values, the other values with the 1.0 value. What should I do, Thanks Taiseer
2007 Feb 08
2
path for source()
hello, i have a couple of .R files distributed about my file system. i commonly source() these from other files, but i have to include the full file path. this is not always convenient if you move files around. is there a way of setting the search path for source()? thanks a lot! cheers, andrew. -- Andrew B. Collier Space Physics Group Hermanus Magnetic Observatory Honorary Research Fellow
2010 Nov 15
1
Sweave: Conditional code chunks?
I have a code junk that produces a figure. In my special case, however, data does not always exist. In cases where data exists, the code chunk is of course trival (case #1), however, what do I do for case # 2 where the data does not exist? I can obviously prevent the code from being executed by checking the existence of the object x, but on the Sweave level I have a static figure chunk. Here an
2007 Oct 04
1
Problem with .libPaths & Rterm.exe (under Vista)
Dear list, I?m using R embedded in another program (coded in tcl/tk) under Windows Vista. In this context I don?t launch Rgui.exe but rather Rtem.exe. Now I have a problem finding libraries not specifically installed as administrator (and which are not in the path ?program files? but in Contacts\Documents of the current user). To be precise, the user launching my tcl/tk program can?t find
2011 May 31
1
how to define PKG_CONFIG_PATH ?
Dear List, as I'm trying to install R and Rgraphwiz on a Fedora Linux, I have a problem with the environement variable "PKG_CONFIG_PATH". The library "libgvc" is not getting recognized / found, although a recent version libgvc is on the system and can be seen via /usr/lib64. I've tried to edit the paths described in /etc/ldpaths but without any success. Any hints how
2007 Mar 06
2
Package RODBC
I have some questions about the RODBC package. library(RODBC) # required for those who want to repeat these lines 1st, I noticed that the following sequence does not work: channel <- odbcConnextExcel("test.xls") tables <- sqlTables(channel) name1 <- tables[1, "TABLE_NAME"] # this should be the name plan1 <- sqlFetch(channel, name1) # bang!
2013 Aug 29
10
Concatenate two arrays
Hello again ruby community! I just learned how to add two arrays(I know, i know). My program looked like this array1=[1,2,3] array2=[4,5,6] array_sum=array1+array2 I thought pretty simple stuff, they are combined. However, now i am looking to define that code as a method and I do not understand how to create the correct number of arguments, so when the method is called back it gives me my
2009 Sep 01
3
data frame
HI, R user, I generate the vectors with the same length. I want to put each vector into each column of data frame. Why it doesnt work`? rm<-data.frame() for(a in 1:6){ rm[,a]<-getmeasure(p1,a,speech) } thanks a lot Tammy _________________________________________________________________ Share your memories online with anyone you want.
2010 Aug 31
4
pasting together 2 character arrays
If possible I would like to combine two different character arrays in combinations Array1 <- c("height","weight","age","sex") Array2 <- c("trt0","trt1","trt2") I would like to combine these two character vectors to end up with such ... Array3 "height.trt0.trt1" "height.trt0.trt2"
2009 Oct 26
3
Sandard deviation calculation
Dear all I am trying to learn R I was trying to calculate standard deviation here are the commands and outputs in R > sd(Ht_cm[type=='SD'])[1] 3.283605> sd(Ht_cm[from_treeline=='above'])[1] 16.83289> sd(Ht_cm[type=='SD'][from_treeline=='above'])[1] NA> the problem is that, i could not understand why the third command could not give any result.
2006 Sep 08
2
Multiple matrix multiplication with two 3-dimensional arrays
Hi, I need to do several matrix multiplications with the corresponding matrices forming two 3-dimentional arrays. To illustrate my problem, let's say I have the following 3-dimensional arrays: array1 <- array(1:30,dim=c(3,2,5)) array2 <- array(1:20,dim=c(2,2,5)) I know that I can get what I want with the following computation : result <- array(dim=c(dim(array1)[1],
2011 Mar 15
4
run a slef-written function
How could one get started with a self-written function? I have a function written in .txt format, but can not find the way to import it to the R space. Would be very appreciated for help. -- View this message in context: http://r.789695.n4.nabble.com/run-a-slef-written-function-tp3356537p3356537.html Sent from the R help mailing list archive at Nabble.com.
2014 May 22
2
[LLVMdev] RFC: Indexing of structs vs arrays in getelementpointer
On May 22, 2014, at 3:51 PM, Chandler Carruth <chandlerc at google.com> wrote: > > On Thu, May 22, 2014 at 4:42 PM, Louis Gerbarg <lgg at apple.com> wrote: > The problem that the above transform is technically illegal because “When indexing into a (optionally packed) structure, only i32 integer constants are allowed (when using a vector of indices they must all be the same