Dan-Erik wrote: > When I was doing SEM using R for my master thesis, I found it rather > difficult to work with. Just finding the package for R and installing > it took some time, then trying to work out the somewhat lacking > documentation and figuring out how to use the different parts of the > package was far from easy. When I finally figured out how to work with > the thing, plotting the graphs left a lot to be desired. I ended up > plotting the graphs in the very basic form that R provides until I got > the model I wanted to use and then I had to re-draw the chart manually > using Inkscape to get it in a form that I thought was presentable. > > Basically, the SEM package for R isn't complete. And it also has a few > bugs in it, which means that negative values for covariance produces > very awkward results. These bugs are acknowledged by the author of the > package, but as far as I know there hasn't been any development for > quite a while. The homepage of the author (jfox, linked from > http://cran.r-project.org/web/packages/sem/index.html) isn't even > available any longer. Even with the issues of bugs and rough > documentation and difficult interface and so forth, the basic > functionality of the SEM package for R is working well enough to > present some data. But the options for producing good graphs from the > data is just not acceptable in my opinion.
Are you talking about this package, or something different? http://openmx.psyc.virginia.edu/ (I have no idea what SEM is, other than what you've said above. It just looked like this package was better than what you described above...) Thanks, Jason -- Jason Grout --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
