[R-sig-eco] SEM with time series?

2010-11-29 Thread Mudrak, Erika [EEOBS]
I am helping a colleague with stats analysis, and though it's a seemingly simple setup, it's becoming quite complicated! The system is a deciduous forest with treefall gaps of different carefully chosen sizes. The response variable is amount of NH3 found in the rainwater collected under each

Re: [R-sig-eco] SEM with time series?

2010-11-29 Thread Ben Bolker
On 11/29/2010 11:05 AM, Mudrak, Erika [EEOBS] wrote: I am helping a colleague with stats analysis, and though it's a seemingly simple setup, it's becoming quite complicated! The system is a deciduous forest with treefall gaps of different carefully chosen sizes. The response variable is

Re: [R-sig-eco] SEM with time series?

2010-11-29 Thread Jarrett Byrnes
One could also setup an SEM with autoregressive paths specified. The missing data issue is something separate, however. There are ways in SEM of dealing with it - Full Information Maximum Likelihood and the like. I'd recommend taking a look at the lavaan package in R.

Re: [R-sig-eco] SEM with time series?

2010-11-29 Thread Etienne Laliberte
Of Ben Bolker Sent: Tuesday, 30 November 2010 12:23 AM To: r-sig-ecology@r-project.org Subject: Re: [R-sig-eco] SEM with time series? On 11/29/2010 11:05 AM, Mudrak, Erika [EEOBS] wrote: I am helping a colleague with stats analysis, and though it's a seemingly simple setup, it's becoming quite