Displaying 20 results from an estimated 10000 matches similar to: "alternative way to loop"
2007 Sep 16
2
stalled loop
Hi,
The loop I wrote executes correctly but is stalled seriously. Is there a
way to hasten execution without coming up with a brand new algorithm ?
please help. Thanks.
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2007 Sep 15
2
naming columns of data frame
Hey,
I am trying to make a data frame and the name of a column is composed of a
number, a dot, and a word, such as "1.whatever". But I always get this error
message:"syntax error, unexpected SYMBOL, expecting ',' in:" while printing
data frame out . When I rename the column with purely letter, everything
works fine. Some suggestion about the cause/ solution ?? Thanks.
2009 Aug 03
2
combine venn diagram and pie chart
Hi R users,
I am wondering if it there is any R's function helping integrate venn
diagram and pie chart to compare two related datasets.
I know the package limma(bioconductor) has something built-in for making
venn diagram, but I guess it would be very painful to use line and text to
specify the proportions in the fashion of pie chart .
Thanks in advance,
Kevin Chang
--
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2009 Feb 26
1
layout of igraph
Dear R users,
I am trying to draw a network using igraph package. I intend to place the
hub nodes (the ones with the relatively more connection with other nodes) in
the center of the graph. Also, the graph need to be in the fashion that the
higher the correlation between two nodes is , the closer the two nodes will
be. Is there any layout that can help or any other way to do this?
Thanks in
2009 Mar 03
1
save the layout using igraph
Hi R users,
I am using built-in functions in igraph package to draw networks . I need
to compare several network with exactly the same structure but with edge
hightlighted differently. I am wondering if there is a way to save the
layout so that every graph will look the same as each other except for the
colors of edges. Or is there any parameter I can set for this purpose??
Thanks in advance,
2007 Oct 29
2
flops calculation
Hi all,
Since proc.time return three different kind of times (user, system and
elapsed) , I am wondering which one is right for calculating flops. In New S
Language (Becker et. al. ) , it seems to be the user because " the user time
measures the processor time used in S and the system time measures the
operating system in response to S's request". But in R Help , system time
2007 Sep 13
1
rearrange problem
Hi All,
I am trying to rearrange alphabetically each element in a character vector.
ex: say the first element in the vector is "cba", and my goal is to turn it
into "abc". The suggested function to use is sort(). But it turns out that
sort doesn't work at the level of element. So I am wondering that if there
is an alternative function for this purpose. Please help me out .
2009 Jul 20
1
locate substring in the string it belong to
Hi R users,
I am trying generate the indices for locating a in the string it come from.
Given the length of the string, it will take too long using the combn() for
further comparison. I am wondering if R has any built-in function for this
purpose.
To make it concrete:
this.substring="cc"
this.string="ccc"
start.location=1,2
end.location=2,3
Thanks in advance,
Kevin
2007 Dec 11
2
Alternative to For Loop?
Hi,
I am doing a calculation on a long series using a For Loop. Here is an
example of the calculation:
accumulate=function(x){
y=0
z=0
for(i in 1:length(x)){
y=y+x[i]
z=c(z,y)
}
return(z[2:length(z)])
}
> x=c(1:10)
> x
[1] 1 2 3 4 5 6 7 8 9 10
> accumulate(x)
[1] 1 3 6 10 15 21 28 36 45 55
>
Although the For Loop works, looping through an array is time
1998 Feb 27
1
R-beta: is there a way to get rid of loop?
Here is a programming question. The code I am using is quite slow and I
was wondering if there is a way to get rid of the for loop.
I am dealing with "interaction" in 2x2 table, and am using Edwards's G_I
(Likelihood, p. 194).
I label the cells in the table as follows
stim response
"y" "n" total
--------------------------------
y hit miss nsignal
2008 Aug 27
1
conversion of data structure between R and Perl
Dear R users,
I am trying to call a Perl subroutine from R . The subroutine returns an
arrray contaning three elements wihch are all strings. But the calling in R
return an integer which is 0. I have no idea how this could happen. Maybe
becasue I shouldn't use system() in R or I should load a particular package
for my R in windows. Please help ....
2007 Oct 03
1
inverse of matrix made by low.tri function
Hi all,
I am using R trying to get a inverse matrix of (X^T)X , but I keep getting
the error
message like: no b argument and no default value for sprintf(gettext(fmt,
domain = domain), ...) .
--------------------------------------------------------------------------------------------
# my code
X<-Matrix(rep(1,500),100,5)
X[lower.tri(X)]<-1-10^-7
XtX<- t(X)%*% X
XtXu<-lu(XtX)
2007 Oct 27
1
Newton method iteration problem
Hi all,
I am coding for finding the root of f(x)= phi(x) -alpha where phi(x) is the
cumulative density function and alpha is constant . The problem right now is
I can't get the "initialX" representing the root out of the while loop when
ending , it seems to me it disappear when the loop ends accroding to the
error message. I need help . Please suggest the cause or solution to this
2008 Mar 31
1
APPLY as alternate to FOR loop?
Dear list,
Below I've written a clunky for loop that counts NA's in a row, replacing all with NA if there are
more than 3 missing values, or keeping the values if 4 or more are present. This is sample code from a very large
dataframe I'm trying to clean up.
I know there are many simpler more elegant solutions to this little problem.
Would someone be willing to show me how to
2008 Dec 03
3
alternative way to replicate()
Dear all,
I'm looking for an alternative way to replicate the "2," string for an
x number of times, and end up with one string containing "2," x times.
I can partly achieve this using replicate().
> y <- rep("2,", times=3)
> y
[1] "2," "2," "2,"
The output that I am looking for is, however, "2,2,2,". I also tried
2003 Sep 21
0
Alternative way for changing passwords
Hi
This is not directly related to samba
but may be useful to administrators.
We developed this server for linux to
allow users to change their passwords
using a https capable web browser.
The source code and aditional info are available at:
http://linuxconsulting.planetaclix.pt/soft/passwdd.html
For support and comments please don't
send to samba mailing lists.
2012 Jul 02
2
[LLVMdev] Alternative of Loop::getTripCount?
I found out that Loop::getTripCount method is obsolete in LLVM 3.1
Is there an alternative?
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2012 Jul 03
0
[LLVMdev] Alternative of Loop::getTripCount?
Hi Taemin,
On 03/07/2012 01:53, Taemin Kim wrote:
> I found out that Loop::getTripCount method is obsolete in LLVM 3.1
> Is there an alternative?
I use getSmallConstantTripCount() to get loop trip counts using the
ScalarEvolution analysis pass. See
include/llvm/Analysis/ScalarEvolution.h for a detailed explanation.
Ivan
>
>
> _______________________________________________
2002 Oct 02
0
Alternative to slow double for() loop
Dear List
Many thanks to those who helped me yesterday regarding possible ways to
increase memory size in R.
I have found the inefficient part of my program to be a double for() loop,
and was wondering if anybody could suggest an alternative to using this
double loop which would speed things up.
The program looks like this:
for (j in 1:m) {
for (i in 1:n) {
2009 Jul 23
2
alternative to rbind within a loop
Hi,
I often have to do this:
select a folder (directory) containing a few hundred data files in csv
format (up to 1000 files, in fact)
open each file, transform some character variables in date-tiime format
make into a dataframe (involves getting rid of a few variables I don't
need
concatenate to the master dataframe that will eventually contain the
data from all the files in the