On 5/6/2013 7:02 AM, arun wrote:
stErr<- sd(vec1)/sqrt(length(vec1))
Or possibly,
stErr<- sd(vec1)/sqrt(!is.na(vec1))
--
Robert W. Baer, Ph.D.
Professor of Physiology
Kirksille College of Osteopathic Medicine
A. T. Still University of Health Sciences
Kirksville, MO 63501 USA