search for: seropos

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2011 Apr 12
1
2-parameter MLE problems
Hi all, Sorry for the re-post, I sent my previous e-mail before it was complete. I am trying to model seroprevalence using the differential equation: dP/dt = beta*seronegative*.001*(seropositive)-0.35*(0.999)*(seropositive)-r*seropositive. I would like to estimate my two parameters, beta and r, using maximum likelihood methods. I have included my code below: summary=read.delim('summary.txt',header=T) summary Year N SeroPos SeroNeg 1 1 75 1 74 2 2 12...