[R] crash when using hazard.ratio.plot from rms package

2011-01-25 Thread Hongying Li 

Dear all,
I always encounter a crash when running hazard.ratio.plot from rms package with 
my predictor as a factor.
It works fine when the predictor is a continous score. 
Anyone encounters this too? Is this a bug or something?
Thanks,
Lilian
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[R] (no subject)

2010-08-23 Thread Hongying Li 

Hi all,
I have a question about survplot in Design package. There is an option to print 
the number of subjects at risk at the start of each time interval.
But I do not know how the time interval is decided, i.e. I do not know the 
correspoding time to the number at risk printed.
How can I get the time?
Thanks!
  
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[R] coxph

2010-08-09 Thread Hongying Li 

Hello,
when using coxph function from survival package, what do you do if you 
encounter such problem like:
 
Warning message:
In fitter(X, Y, strats, offset, init, control, weights = weights,  :
  Loglik converged before variable  3,4 ; beta may be infinite. 
 

Thanks!   
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Re: [R] reading dates in Excel into R

2010-07-30 Thread Hongying Li 

 I just do not want the dates format change randomly (seems to me) each time I 
read it from excel2007 file into R. 
When I export the excel2007 fiel into csv file and use read.csv function then 
the dates all come out good (as mm/dd/ in csv file).
I guess I have to first import into csv file before reading into R. Just avoid 
reading from Excel2007 files directly. 
Thanks,
Hongying
 
 
 
 Date: Fri, 30 Jul 2010 10:24:50 +0100
 Subject: Re: [R] reading dates in Excel into R
 From: fra...@gmail.com
 To: peter.alsp...@plantandfood.co.nz
 CC: colorl...@hotmail.com; r-help@r-project.org
 
 To read the data into R
 1) I format my dates as -MM-DD in Excel (or OpenOffice Calc),
 2) (change =na() to NA)
 3) Check that required number of significant decimal places are displayed,
 4) export as csv and
 5) Use readSeries() function from Rmetrics timeSeries package to read
 the data into R.
 
 For what it is worth I have found this approach flexible .
 
 Best Regards
 
 John
 
 On 29 July 2010 22:18, Peter Alspach peter.alsp...@plantandfood.co.nz wrote:
  Tena koe
 
  What do you want to control?  You can govern the format used in R using the 
  appropriate R functions.  I doubt it would be useful to have dates read 
  from Excel depend on the format set for displaying those dates in Excel.
 
  HTH 
 ,,,
 
  Peter Alspach
 
  -Original Message-
  From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-
  project.org] On Behalf Of Hongying Li
  Sent: Friday, 30 July 2010 5:33 a.m.
  To: r-help@r-project.org
  Subject: [R] reading dates in Excel into R
 
 
  I am reading dates in Excel2007 into R.
 
  Here are the functions I used:
 
  library(RODBC)
  channel-odbcConnectExcel2007(myfile.xlsx)
  tmp-sqlFetch(channel,1,as.is=T)
 
 
  The dates in myfile.xlsx are all in this format: mm/dd/. But when I
  read it to R, some columns look like -mm-dd 00:00:00, some
  columns look like -mm-dd, and some columns are numbers. I do not
  know how I can control this.
 
 
 
  Any help? Thanks!
 
 
 
  _
  Hotmail is redefining busy with tools for the New Busy. Get more from
  your inbox.
 
  N:WL:en-US:WM_HMP:042010_2
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  guide.html
  and provide commented, minimal, self-contained, reproducible code.
 
  __
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 -- 
 John C Frain
 Economics Department
 Trinity College Dublin
 Dublin 2
 Ireland
 www.tcd.ie/Economics/staff/frainj/home.html
 mailto:fra...@tcd.ie
 mailto:fra...@gmail.com
  
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[R] reading dates in Excel into R

2010-07-29 Thread Hongying Li 

I am reading dates in Excel2007 into R.

Here are the functions I used:

library(RODBC)
channel-odbcConnectExcel2007(myfile.xlsx)
tmp-sqlFetch(channel,1,as.is=T)


The dates in myfile.xlsx are all in this format: mm/dd/. But when I read it 
to R, some columns look like -mm-dd 00:00:00, some columns look like 
-mm-dd, and some columns are numbers. I do not know how I can control 
this.

 

Any help? Thanks!

 
  
_
Hotmail is redefining busy with tools for the New Busy. Get more from your 
inbox.

N:WL:en-US:WM_HMP:042010_2
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and provide commented, minimal, self-contained, reproducible code.