Message-ID: <23223703.post@talk.nabble.com>
Date: 2009-04-24T19:52:10Z
From: BillJones
Subject: Invert Deviance Residuals
I have a vector of deviance residuals, r, a vector of fitted values, yhat and
I need to solve for a vector of actuals, y. The deviance residual formula
is r={2(c ln c - c + 1)}^1/2. c=y/yhat.
Since this can't be solved in closed form, I believe that I should be able
to solve this numerically using a function like optim but I can't get my
head around how to setup the problem and looking at the examples for optim
it hasn't clicked for me. Any help would be appreciated.
I am using this result as part of a funtion to do non-parametric
bootstrapping of a glm to build a range around my parameter errors.
Thanks.
Bill
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