Hello, 

   I am currently operating R version 2.0.1. I am running an analysis
that uses previously written fuctions that I load into R 2.0.1 via the
file menu (file-->load workspace). There are other colleagues on my team
that are operating the same version of R, using the same input datafile,
the same workspace, and the same R code to run this analysis. Their
analysis runs without any errors, yet mine does does not. The analysis
that we are running attempts to create a  sample of individuals that
meets certain compositional demographic criteria. To achieve this we ask
R to run though up to 10,000 iterations before producing a sample that
BEST (i.e., with the smallest rate of error) conforms to the proportions
of these demographic characteristics that we specify. When I run this
analysis, R produces an output file that results from fewer interations
with higher error rates than what my colleagues have achieved when
running the same exact code on the same exact data. The error message
that populates my R output window is as follows: "Error in
sample(length(x), size, replace, prob) : NA in probability vector". I do
not understand why I receive this error message, whereas my colleages do
not. Any guidance/advice would we extremely helpful!

Thank You!
Gabriella Delle Donne





	[[alternative HTML version deleted]]

