Displaying 2 results from an estimated 2 matches for "hlm6".
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2009 Sep 23
1
More naive questions: HLM6 comparisons? what is a "stack imbalance" in lmer? does lmer center variables?
1. One general question for general discussion:
Is HLM6 faster than lmer? If so, why? What should I watch for to spot
the differences?
I'm always advocating R to students, but some faculty members are
skeptical. A colleague compared the commercial HLM6 software to lmer.
HLM6 seems to fit the model in 1 second, but lmer takes 60 seconds.
My first...
2009 Feb 28
1
lme4 and Variable level detection
...UI for lme4, and I was wondering if there is a function
that automatically detects on which level every variable exists.
Furtheremore I got kind of confused about what a random effects model
actually calculates.
I have some experience with commercial software packages for multilevel
analysis, like HLM6, and I was surprised that lme4 does not require the user
to specify the level for every predictor variable. Is this because the
function automatically detects the level by testing on which levels the
predictor has variance, or is this information simply not needed?
I was taught that a crosslevel i...