[R] using loglog link in VGAM or creating loglog link for GLM

Gavin Simpson gavin.simpson at ucl.ac.uk
Mon Jan 24 13:26:24 CET 2011

On Sun, 2011-01-23 at 10:56 -0800, torbjore wrote:
> I think you guys make it more difficult than it has to be. Estimating
> probability of success with a loglog-link is equivalent to estimating
> probability of failure with a cloglog-link, so all you have to do is to
> change the response variable accordingly (and then you can interpret
> parameter estimates (or any contrasts in general) as hazard ratios)...

Err, isn't that **exactly** what I said?! (May be the "you guys" wasn't
aimed at me but there were only two responses in that thread, one of
them from me... and you haven't quoted to what it was you were

> Though, I wish there was a loglog-link in glm and lmer so you wouldn't have
> to do this.

You are, in effect, asking other people to maintain more code for you
when you can easily alter the coding for the response.

 Dr. Gavin Simpson             [t] +44 (0)20 7679 0522
 ECRC, UCL Geography,          [f] +44 (0)20 7679 0565
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