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2010 Oct 07
2
How do I set the dispersion parameter in poisson glm?
...sson, offset(log(area)), data=tallPSME.df) I want to fix the dispersion parameter at 2.5. How can I do this, please? Many thanks in advance for your help, Manuela >::<>::<>::<>::<>::<>::<>::<>::<>::< Manuela Huso Consulting Statistician 201H Richardson Hall Department of Forest Ecosystems and Society Oregon State University Corvallis, OR 97331 ph: 541-737-6232 fx: 541-737-1393
2010 Sep 28
4
drawing samples based on a matching variable
Hi, everyone. I have what I hope will be a simple coding question. It seems this is a common job, but so far I've had trouble finding the answer in searches. I have two matrices (x and y) with a different number of observations in each. I need to draw a random sample without replacement of observations from x, and then, using a matching variable, draw a sample of equal size from y. It is the