search for: stephen_collin

...1,to=cc2) #Plot No. 1 x11() plot(cdata.den,col=1) lines(pre.den,col=2) #Plot No. 2 plot(pre.den,col=2) lines(cdata.den,col = 1) Regards, Stephen Collins, MPP | Analyst Health & Benefits | Aon Consulting 200 East Randolph, Suite 900, Chicago, IL Tel: 312-381-2578 | Fax: 312-381-0136 Email: stephen_collins@aon.com [[alternative HTML version deleted]]

...ve? My attempts to use the apply-based functions have dead ended. Other ideas to vectorize this problem are warmly welcomed. Regards, Stephen Collins, MPP | Analyst Health & Benefits | Aon Consulting 200 East Randolph, Suite 900, Chicago, IL Tel: 312-381-2578 | Fax: 312-381-0136 Email: stephen_collins@aon.com Aon Consulting selected by the readers of Business Insurance as the “Best Employee Benefit Consulting Firm” in 2006, 2007, and 2008 NOTE: The information contained in this transmission, including any attachment(s) is only for the use of the intended individual(s) or entity, and may...

...og-likelihood at least as large as that of the restricted model. Am I interpreting the "loglik" output incorrectly? Regards, Stephen Collins, MPP | Analyst Health & Benefits | Aon Consulting 200 East Randolph, Suite 900, Chicago, IL Tel: 312-381-2578 | Fax: 312-381-0136 Email: stephen_collins@aon.com Aon Consulting selected by the readers of Business Insurance as the “Best Employee Benefit Consulting Firm” in 2006, 2007, and 2008 NOTE: The information contained in this transmission, including any attachment(s) is only for the use of the intended individual(s) or entity, and may...

...its task at hand? I need to know what type of processor, how much memory, cache, etc., I should be looking for in a desktop. Regards, Stephen Collins, MPP | Analyst Health & Benefits | Aon Consulting 200 East Randolph, Suite 900, Chicago, IL Tel: 312-381-2578 | Fax: 312-381-0136 Email: stephen_collins@aon.com Aon Consulting selected by the readers of Business Insurance as the “Best Employee Benefit Consulting Firm” in 2006, 2007, and 2008 NOTE: The information contained in this transmission, including any attachment(s) is only for the use of the intended individual(s) or entity, and may...

How do you view the code for a built-in R command (i.e., if I want to see what R is doing when I run a glm() statement)? Regards, Stephen [[alternative HTML version deleted]]

I am using mle as a wrapper from optim( ). How would I extract the convergence code, to know that optim( ) converged properly? Thanks, Stephen Collins, MPP | Analyst Global Strategy | Aon Benfield [[alternative HTML version deleted]]

When including categorical variables in a regression, the default in R is to set the first level as the base. Is there an option to specify a different level as the base? Regards, Stephen Collins, MPP | Analyst Health & Benefits | Aon Consulting [[alternative HTML version deleted]]

I've seen with other software the capability for the optimizer to switch algorithms if it is not making progress between iterations. Is this capability available in optim()? Thanks, Stephen Collins, MPP | Analyst Health & Benefits | Aon Consulting [[alternative HTML version deleted]]

Say I have a formula Y ~ 1 + X, where X is a categorical variable. A previous thread showed how to evaluate this model using the mle package from "stats4" (see below). But, the user had to create the data matrix, X, including the column of one's for the regression constant. Is there a way to nest the linear formula in the code below, so the data matrix doesn't explicitly