Displaying 20 results from an estimated 600 matches similar to: "Loading Problem"
2010 May 11
3
Improving loop performance
R-users,
I have the following piece of code which I am trying to run on a dataframe (aga2) with about a half million records. While the code works, it is extremely slow. I've read some of the help archives indicating that I should allocate space to the p1 and ags1 vectors, which I have done, but this doesn't seem to improve speed much. Would anyone be able to provide me with advice on
2010 May 12
2
R version of SAS/IntrNet
Does an R package exist that is similar to SAS/Intrnet (http://support.sas.com/documentation/onlinedoc/intrnet/index.html) that will allow users to take parameters passed to it by a web request, produce results and return them to the web-browser in HTML format? I tried looking through the package descriptions, but didnt' see anything like this. Any direction or suggestions you could provide
2000 Jan 31
1
Crosstabs?
Is there an equivalent in R to the crosstabs command S-Plus? I've been
searching for a while and can't seem to find anything.
Thanks.
Mark J. Lamias
Department of Statistics
Department of Political Science
Survey Methodology Program/Survey Research Center
Institute for Social Research - University of Michigan
426 Thompson Street, Room 315
Ann Arbor, Michigan 48104-2321
(734) 647-5381
2000 Mar 07
3
Merging data.frames
On Tuesday, March 07, 2000 5:40 PM, Richard Bilonick wrote:
>I need to merge several data.frames into one data.frame. In S-Plus I would
>use
>"merge" but I don't see a merge command in R. What is the best way to
>accomplish
>this?
The easiest way to to this, I think, is as follows:
if you have several data frames, dataframe1, dataframe2, . . . , dataframen,
you
2000 Apr 02
0
Expected Value of Residuals
Does anyone know a command to obtain the expected values of residuals under
normality? Better yet, is there a command to perform a correlation test for
normality (not Shapiro-Wilk Test)?
I've looked everywhere, and can't seem to find how to do this.
Thanks.
Mark J. Lamias
Department of Statistics
Department of Political Science
Survey Methodology Program/Survey Research Center
2003 Sep 08
2
Persp Plot
I am trying to graph two planes on the same graph using persp(). I can only
get one plane to plot at a time. Can someone explain how I can graph two
planes on the same graph using persp? I've looked throught the
documentation, but cannot find any references to appending a persp plot.
Thanks.
Sincerely yours,
Mark J. Lamias
Statistical Consultant
2003 Aug 26
1
Mann-Whitney U Table
Does anyone have a piece of code or know how I can use R to generate a table
of
critical values for the Mann-Whitney (aka Wilcoxon Rank Sum) test.
Ideally, I'd like a table that contains the critical values for any two
samples of size 3 through 30. I could use Monte Carlo simulation or the
normal approximation when n1 and n2 are greater than, 10, but I figured
someone may know how to
2012 Nov 29
5
bootstrapped cox regression (rms package)
Hi,
I am trying to convert a colleague from using SPSS to R, but am having
trouble generating a result that is similar enough to a bootstrapped cox
regression analysis that was run in SPSS. I tried unsuccessfully with
bootcens, but have had some success with the bootcov function in the rms
package, which at least generates confidence intervals similar to what is
observed in SPSS. However, the
2003 Sep 18
2
dwilcox (PR#4212)
Full_Name: Mark J. Lamias
Version: 1.7.0
OS: Windows 2000 Pro
Submission from: (NULL) (65.222.84.72)
I am running the qwilcox procedure and it is producing incorrect results. For
example, dwilcox(.025, 3, 5) should equal 6, but it is equal to 1. Similarly,
dwilcox(.025, 3, 6) should equal 7, but it equals 2. The critical values are
not set being returned with the correct values. I've
2012 Oct 12
3
Autofilling a large matrix in R
I wish to create a matrix of all possible percentages with two decimal place
percision. I then want each row to sum to 100%. I started with the code
below with the intent to then subset the data based on the row sum. This
works great for 2 or 3 columns, but if I try 4 or more columns the number of
rows become to large. I would like to find a way to break it down into some
kind of for loop, so
2001 Jan 02
1
minor problems (if problems at all): <ESC> in RGui; finding some (PR#799)
[These things don't seem to be of too great importance and may well not meet
the criteria of a "bug", but, for what it's worth,I thought I'd submit them
to r-bugs anyway:]
This is the R version:
> version
_
platform i386-pc-mingw32
arch x86
os Win32
system x86, Win32
status
major 1
2000 May 17
1
crosstabs
Hi all!
What is the equivalent R function of SPLUS crosstabs?
Thank you.
Danar.
Stat. Inst. Umea Univ.
Umea, Sweden
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2003 Sep 18
0
non-numeric binary ops?
Has there been a recent change in the behavior of binary operators?
In SparseM it was, until quite recently ok to do scalar multiplication
but now,
> A*4
Error in A * 4 : non-numeric argument to binary operator
> 4*A
Error in 4 * A : non-numeric argument to binary operator
> A%*%A
An object of class "matrix.csr"
Slot "ra":
[1] 1 1 1
Slot "ja":
[1] 1 2 3
2000 Jun 13
2
command history under cursor keys
g'day R friends,
I was hoping someone could provide me with advice as to my dysfunctional
'arrow' keys.
Instead of browsing thru my command history they just move my cursor. What
have I done wrong? My TERM seems ok for other unix apps.
I'm running under hpux 10.20 with R1.0.0
thanks,
John Strumila
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2000 Apr 11
1
dates in 0.99 and 1.0 windows
Dear friends. I'm in windows version R1.0.0. The code below produced a very
beautiful and efficient graph in R Version 0.99.0 Patched (February 9,
2000) but in the newest, the x-axis is unreadable with dates written
unformatted. I tried to set the numbers using par(xaxp) or xaxs but to no
avail. Since it was OK just in the last version I guess there might perhaps
be something wrong
2000 Jul 20
1
bad R bug
Hi,
I am not on this mailing list, but here is a terrible bug that has
stopped me in my tracks. I am unable to remove observations from a data
matrix.
temp is the original matrix. Notice that there are 288 entries with a
104 in the first column. I attempt to remove these entries, but R does
not do it.
brad
ACTUAL COMMANDS:
> dim(temp)
[1] 30528 11
> table(temp[,1])
1 3 4
2011 Oct 31
2
one sample Wilcoxon test using 'coin'
Hi,
R allows me to run a one sample Wilcoxon test like this:
wilcox.test(c(1,3.5,2.1,4,1.5,5), mu=2, exact=TRUE)
The function 'wilcoxsign_test' from the package 'coin' should (I
suppose) be able to calculate exact p values even if there are ties in
the ranks. However, I couldn't find information on how to run a one
sample test using 'wilcoxsign_test' like in the
2011 Feb 27
2
MLE estimation
Dear List,
This problem is more a statistic one than a R one.
Any one can recommend me some references website or online paper on
maximum likelihood estimation?I'm now working on that,while still
doubt how to prove that the estimated parameters are normal
distributed.
Thanks for your time and help!
Best,
Ning
2013 Jan 24
1
Recommendation for website to format R code
Hi list,
Could anyone recommend some good website for formatting R code? For
example, when you copy paste R code to gmail and back to R, it loses its
format, the dash symbol causes errors.
I've had someone used it to format my code here on the list, but can't find
it anymore.
Mike
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2012 Nov 20
3
Greek letters on title
Hi all,
I want to plot a series "x" and I want to put on title "Time evolution with
alpha=0.2", e.g.,
plot(x, main="Time evotion with alpha=0.2",col="orange")
Is there any posibility to put the greek letter and avoid written the word?
Many thanks in advance.
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