haziqj / lavaan Goto Github PK

Hi @giuseppealfonzetti. Sorry for the radio silence. I am currently travelling so not able to look at our project just yet.

However I wanted to share with you some broad ideas on what needs to be done. To understand better I share with you this R script by Yves: https://github.com/yrosseel/lavaan/blob/master/inst/understanding_lavaan_internals.R It's a little outdated but in principle I think it's still the same. When lavaan is called it goes through a series of steps, and the steps are often conditional on the estimation method.

Our job essentially is to create a new estimator = "SPML" (which stands for stochastic pairwise max likelihood), and then replace the necessary functions with functions you created in the {plFA} package.

Importantly Yves requests that {lavaan} contain no C/C++ code (at least for now), which means that the {plFA} will have to coexist with {lavaan}. Might require some tinkering at the plFA side to get things working smoothly too.

Anyway I will pick this up closer to July, when I can afford to dedicate time to this. If you have any questions in the mean time feel free to ask.

Haziq