Displaying 8 results from an estimated 8 matches for "lanr".
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land
2007 Aug 10
7
Help wit matrices
...0 matrix that tells me which value in the matrix is greater
than a theshold value (1 or 0 indicator).
i have tried
mat2<-as.matrix(as.numeric(mat1>0.25))
but that returns a 1:100000 matrix.
I have also tried for loops, but they are grossly inefficient.
THanks for all your help in advance.
Lanre
2006 Aug 01
4
Overlay Boxplot with scatter plot
...300,600,600,600,600,900,900,900,900)
bb<-(13,12,14,11,56,44,34,75,22.,34,22,98,59,55,56)
cc<-(13,12,14,11,56,44,34,75,22.,34,22,98,59,55,56)
nn<-data.frame(aa,bb)
mm<-data.frame(aa,cc)
boxplot(bb~aa, data=nn)
lines(cc~aa, data=cc)
Any help with example code is appreciated.
Thank you.
Lanre
2006 Aug 09
3
Unique rows
hello all,
I have a dataset where the subjects are duplicated. How do I subset
such that I can get only I row/subject.
aa<-c(1,1,2,2,3,3,4,4,5,5,6,6)
bb<-c(56,56,33,33,53,53,20,20,63,63,9,9)
cc<-data.frame(aa,bb)
I would like to subset df(cc) such that I can get
aa bb
1 56
2 33
3 53
4 20
5 63
6 9
I know this should be fairly easy but I can't figure how to do it in a
dataframe and
2006 May 17
1
Example Syntax for if - then- and - else Statements
...re what my syntax should look like. I am particularly
interested in syntax that can be used with the transform function. for
example
if foo[,1] == 'n', foo[,2] == 4, else foo[,2] == 6
Could someone please share simple example codes with different variants
on the theme.
thanks.
--
Lanre Okusanya, Pharm.D.,BCPS
UB/Pfizer Pharmacometrics Fellow
University at Buffalo School of Pharmacy and Pharmaceutical Sciences
237 Cooke Hall
Buffalo, NY 14260
Email: ooo at buffalo.edu
Tel: (716)645-2828 x 275
Fax: (716)645-2886
2005 Aug 25
4
covariance matrix under null
Hello
I am fitting a Cox PH model using the function coxph(). Does anyone know how
to obtain the estimate of the covariance matrix under the null hypothesis.
The function coxph.detail() does not seem to be useful for this purpose.
Thanks,
KD.
[[alternative HTML version deleted]]
2007 Aug 11
0
DOE and interaction plot general question
...late function and time interval
> (KOITA Lassana - STAC/ACE)
> 44. Re: need help to manipulate function and time interval
> (Henrique Dallazuanna)
> 45. Re: Cleaning up the memory (Prof Brian Ripley)
> 46. Re: write.table (Yinghai Deng)
> 47. Help wit matrices (Lanre Okusanya)
> 48. Re: Cleaning up the memory (Monica Pisica)
> 49. Re: Help wit matrices (jim holtman)
> 50. Row name of empty string issue (adiamond)
> 51. Re: Help wit matrices (Lanre Okusanya)
> 52. Re: Help wit matrices (Henrique Dallazuanna)
> 53. kde2d error messa...
2007 Nov 09
1
Problem Installing 2.6.0 on Mac
I'm not able to install R 2.6.0 on my Mac running 10.5. When running
the installer, and after agreeing to the license, in the "Installation
Type" stage, the Packages are all greyed out (R framework and R GUI
for MAC OS X), and therefore the "Install" button in the lower right
is greyed out. It won't let me select anything to install. Anyone
know what the
2006 Nov 13
3
For MacBook, best way to do R?
I'm getting a MacBook and I'd like to stick with OS X rather than
convert it to Linux just yet.
However, my main concern is having decent performance.
What's my best option:
*use the existing binary for R?
*compile R fresh under OS X?
* install Linux and run R under that?
Does anyone have any recent experience they can share? Thanks!
--
I can answer any question.
"I