Search Archives

An embedded and charset-unspecified text was scrubbed... Name: not available URL: <https://stat.ethz.ch/pipermail/r-sig-ecology/attachments/20100819/8c0eeb08/attachment.pl>

An embedded and charset-unspecified text was scrubbed... Name: not available URL: <https://stat.ethz.ch/pipermail/r-sig-ecology/attachments/20101022/0108e949/attachment.pl>

An embedded and charset-unspecified text was scrubbed... Name: not available URL: <https://stat.ethz.ch/pipermail/r-sig-ecology/attachments/20100903/1e38dca7/attachment.pl>

Hey everyone, I need to make sure of how 'hurdle' from package 'pscl' estimating the count part. in the Code, we may use the command dist='poisson', does it estimate the count part by normal poisson or specially zero truncated...

Dear All, I am using package snowfall version 1.84 on my Mac. I used 'sfApply()' It worked smoothly before. Since today, I enlarge the work, and got an error after several rounds as follows: "error in unserialize(node$con...

Hello everyone, I am using nlm to optimize my own function. But it continuously gice warnings as follows: 'In eval (expr, envir, erlos) iterations terminated because half step-size are very small...' Things like that, anyone came across any similar...

Dear all, I 've gotten a serious question, I have a iMac for work, and now I need to run some simulations in R on our sever, which has the system of Linux, the problem is: I can't copy...

Hello everyone, Does anyone of you using hurdle model? I am reading a paper which said " Hurdle model removes effect of zero-inflation and over-dispersion in the non-zero observations using a quasi-likelihood", I've checked the help...

Hello everyone, Does anyone of you using hurdle model? I am reading a paper which said " Hurdle model removes effect of zero-inflation and over-dispersion in the non-zero observations using a quasi-likelihood", I've checked the help...

Hey, Jochen, I am using vnc for connecting sever instead of ssh, normally it's the middle button for copy-paste for window suer, but not for mac, maybe someone know the replacement of middle button. Cheers, liv On 08...

Thanks for the details, the paper is 'Comparing species abundance models' by Joanne M.Potts, Jane Elith. Click the link... on page 158, in the table, they compare 5 models, both Quasi-likelihood and Hurdle are mentioned. http://www.sciencedirect...

Hi, There is a reason why am I addict to Quasi likelihood, since Hurdle from 'pscl' use Zero Truncated Poisson regression for the non-zero part, which incapable of handling the over-disperson comes from the positive part of the...