Displaying 20 results from an estimated 2000 matches similar to: "vectorisation suggestion"
2010 Feb 02
1
Finding the difference between two vectors
Hello everyone,
I have two vectors having only one element different:
vector1 vector2
vector1
TWC TWC
TWC
VFC TWX
NA
VIA/B VFC
VFC
2008 Jun 13
1
x86 SSE* Pointer Favors
Dear Statisticians--- This is not even an R question, so please
forgive me. I have so much ignorance in this matter that I do not
know where to begin. I hope someone can point me to documentation
and/or a sample.
I want to compute a covariance as quickly as non-humanly possible on
an Intel core processor (up to SSE4) under linux. Alas, I have no
idea how to engage CPU vectorization. Do I need
2012 Mar 30
1
avoiding expression evaluation when calling a function
Another question on functions - I have something that looks like
plotter<-function(i){
temp.i<-rwb[rwb$vector1 <=(i*.10),]
with(temp.i, plot(vector2, vector3, main=(i*.10),))
mod<-lm(vector3~vector3-1,data=temp.i)
r2<-summary(mod)$adj.r.squared
rsqrd[i]<-r2
legend("bottomright", legend=signif(r2), col="black")
abline(mod)
rsqrd<<-rsqrd
}
I'd
2000 Jun 17
2
R 1.1.0 for Windows
Windows binaries at CRAN (bin/windows/Windows-NT/base) have been updated
to R-1.1.0. See below for a list of Windows-specific changes.
We thanks all the people who checked over pre-test versions.
guido masarotto
(for the R-core team)
Windows-specific changes to R
=============================
There is now a GUI preferences editor on the Edit menu in Rgui.
A data entry editor is now
2000 Jun 17
2
R 1.1.0 for Windows
Windows binaries at CRAN (bin/windows/Windows-NT/base) have been updated
to R-1.1.0. See below for a list of Windows-specific changes.
We thanks all the people who checked over pre-test versions.
guido masarotto
(for the R-core team)
Windows-specific changes to R
=============================
There is now a GUI preferences editor on the Edit menu in Rgui.
A data entry editor is now
2008 Nov 08
4
missing value where TRUE/FALSE needed
Hello dear R people,
for my MSc thesis I need to program some functions, and some of them
simply do not work. In the following example, I made sure both vectors
have the same length (10), but R gives me the following error:
Error in if (vector1[i] == vector2[j]) { :
missing value where TRUE/FALSE needed
I googled for possible solutions, but I did not find a good explanation
for this...
2013 Jul 24
3
Levels of a factor
Hi all,
I am having a bit of trouble using the levels() function.
I have a factor with many elements, and when I use the function levels() to
extract the list of unique elements, some of the elements returned are not
actually in the factor.
For example I would have this:
> vector <- dataset$Benchmark
> class(vector)
[1] "factor"
> length(vector)
[1] 35615
> vector2
2012 Jul 30
4
A "matching problem"
Dear all, I was encountering with a typical Matching problem and was
wondering whether R can help me to solve it directly.
Let say, I have 2 vectors of equal length:
vector1 <- LETTERS[1:6]
vector2 <- letters[1:6]
Now I need to match these 2 vectors with all possible ways like:
(A,B,C,D,E) & (a,b,c,d,e) is 1 match. Another match can be (A,B,C,D,E) &
(b,a,c,d,e), however there
2002 Jan 16
4
faster vector subtraction??
hi
is there a faster way to do this?
i <- 1
for(x in vector1)
for(y in vector2) {
m[[i]] <- (x - y)
i <- i + 1
}
regards soren
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2005 Sep 09
2
Simulate phi-coefficient
Looking for help with the following problem.
Given a sample of zeros and ones, for example:
> VECTOR1<-rep(c(1,0),c(15,10))
> VECTOR1
[1] 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0
How would I create a new sample (VECTOR2) also containing zeros and
ones, in which the phi-coefficient between the two sample vectors was
drawn from a population with a known
2009 Apr 03
1
Hello! I got error in C - R
Hello,
My name is Ick Hoon Jin and I am Ph. D. student in Texas A & M Univ..
When I run the C embedded in R in the Linux system, I confront the
following error after 6,000 iteration. By googling I found this error is
from the problem in C.
*** caught segfault ***
address (nil), cause 'memory not mapped'
My C code is following:
2010 Jan 30
2
parsing files for plot
Hi,
I have many files containing one column of data. I like to use the scan
function to parse the data. Next I like to bind to a large vector.
I try this like:
count<-1
files <- list.files() # all files in the working directory
for(i in files) {
tmp <- scan(i)
assign(files[count], tmp)
count<-count+1
}
This part works!
Now I like to plot the data in a boxplot.
2013 Sep 04
3
Fwd: Bienvenido a la lista de distribuciĆ³n R-help-es
Hola Jose, si CONCATENAR significa APILAR, es decir, concantenar
verticalmente, por decirlo de algun modo, podrias hacerlo con rbind():
nuevovector <- rbind(vector1,vector2)
Si ademas quieres que cada valor de los vectores originales sea
identificado en el nuevovector, puedes usar:
nuevovector <- stack(vector1,vector2)
en este ultimo caso se agrega una columna adicional tipo factor, con
2008 Jan 08
1
plotting help request II
Dear all,
meanwhile i found out how to handle the coordinate thing and plot the
lines like i like.
the remaining problem is, i need something like names.arg does in
barplot for my plot.
my plot connects several dots with several lines. and now i like
characters as the names of the intersects of the x-axis.
vector1=c(a,b)
vector2=c(c,d)
# this vector makes sure the yellow line starts at
2011 Nov 02
1
problem with merging two matrices
Dear all,
I hope you can forgive me my stupid questions, but I am a very new R user (;
So, this is my question:
I have two matrices,
those are:
matrix1 <- matrix(cbind(vector1, vector2), 1,2, dimnames = list(c("values"),
c("T value",
"p value")))
matrix2 <- matrix(dcbind,2,6,dimnames =
2011 Jul 08
3
Making a new package: licence
HI All,
I have written and succesfully uploaded a new package. The licence it is under is 'GPL' --no version. My assumption is, since all the code is written in R the licence R used for R would affect the code (hence my "GPL" stands for "whatever version of the GPL R is under")
I am happy with the licencing I used, but I'd like to ask if there is any transitive
2005 Jul 01
2
loop over large dataset
Hi All,
I'd like to ask for a few clarifications. I am doing some calculations
over some biggish datasets. One has ~ 23000 rows, and 6 columns, the
other has ~620000 rows and 6 columns.
I am using these datasets to perform a simulation of of haplotype
coalescence over a pedigree (the datestes themselves are pedigree
information). I created a new dataset (same number of rows as the
pedigree
2012 Jan 28
3
logical subsetting, indexes and NAs
Dear All,
just a quick example:
> x = 1:25
> x[12] = NA
> x
[1] 1 2 3 4 5 6 7 8 9 10 11 NA 13 14 15 16 17 18 19 20 21 22 23 24 25
> y = x[x<10]
> y
[1] 1 2 3 4 5 6 7 8 9 NA
Is there any way of NOT getting NA for y = x[x<10]? Similarly
> y = x[x<15]
> y
[1] 1 2 3 4 5 6 7 8 9 10 11 NA 13 14
How do I get rid of the NA (not post
2003 Aug 26
3
matching-case sensitivity
Hi All,
I am trying to match two character arrays (email lists) using either
pmatch(), match() or charmatch() functions. However the function is
"missing" some matches due to differences in the cases of some letters
between the two arrays. Is there any way to disable case sensitivity or is
there an entirely better way to match two character arrays that have
identical entries but written
2009 Jun 17
3
tiff() woes
Hello all,
a friend has a problem with tiff() which I was unable to help about. I
searched the error messages to no avail. When he tries:
tiff(filename = "FedeWhyDoesntThisBloodyWork.tif", width = 5, height =
5, units = "cm", bg = "white", res = 1200)
Error in tiff(filename = "FedeWhyDoesntThisBloodyWork.tif", width =
5, :
unable to start device