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Question on Vignette : Gradient for Bernoulli #77

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BrianMiner opened this issue Mar 29, 2016 · 0 comments
Open

Question on Vignette : Gradient for Bernoulli #77

BrianMiner opened this issue Mar 29, 2016 · 0 comments

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@BrianMiner
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Is the gradient on page 10 (z_i) showing the derivative for the log-likelihood and not the deviance shown above it (i.e. the neg log-lik)? It seems like the gradient shown is not taking into account the (-) sign (or the 2 for that matter but I have seen that ignored or canceled)?
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@BrianMiner