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

2011-01-24 Thread Gavin Simpson
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

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

2011-01-23 Thread torbjore
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

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

2009-08-23 Thread Gavin Simpson
On Fri, 2009-08-21 at 18:27 -0400, Kendra Walker wrote: I am trying to figure out how to apply a loglog link to a binomial model (dichotomous response variable with far more zeros than ones). I am aware that there are several relevant posts on this list, but I am afraid I need a

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

2009-08-22 Thread Kendra Walker
I am trying to figure out how to apply a loglog link to a binomial model (dichotomous response variable with far more zeros than ones). I am aware that there are several relevant posts on this list, but I am afraid I need a little more help. The two suggested approaches seem to be: 1)

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

2009-08-22 Thread Mark Difford
Hi Kendra, I am trying to figure out how to apply a loglog link to a binomial model (dichotomous response variable with far more zeros than ones). If I were you I would look at ?zeroinfl in package pscl. Regards, Mark. Kendra Walker wrote: I am trying to figure out how to apply a