[R] apply
John Sorkin
jsorkin at grecc.umaryland.edu
Sat Sep 27 05:46:26 CEST 2008
Windows XP
R 2.7.1
I am trying to use apply (or lapply, sapply) to get the sample function to select 1000 samples of size 10 from c(1,2,3) with probability c(0.1,0.2,0.7), i.e.
for (i in 1:1000)
{
j<-sample(c(1,2,3),10,replace=TRUE,prob=c(0.1,0.2,0.7))
print(j)
}
My solution does not work:
jj<-sapply(c(1,2,3),sample,size=10,replace=TRUE,prob=c(.1,.3,.6))
Suggestions?
John Sorkin M.D., Ph.D.
Chief, Biostatistics and Informatics
Baltimore VA Medical Center GRECC,
University of Maryland School of Medicine Claude D. Pepper OAIC,
University of Maryland Clinical Nutrition Research Unit, and
Baltimore VA Center Stroke of Excellence
University of Maryland School of Medicine
Division of Gerontology
Baltimore VA Medical Center
10 North Greene Street
GRECC (BT/18/GR)
Baltimore, MD 21201-1524
(Phone) 410-605-7119
(Fax) 410-605-7913 (Please call phone number above prior to faxing)
jsorkin at grecc.umaryland.edu
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