Displaying 2 results from an estimated 2 matches for "pblack".
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2009 Oct 30
0
NA values in Standard Error for zeroinfl()
I am fitting a model using zeroinfl() and it runs without errors,
returning results that are generally consistent with my hypotheses.
One of my variables is percent black (pblack). This variable was highly
significant in some of the other count models I ran on the way to my
current formulation. It is not significant in this model. As such I
decided to try adding pblack^2 to the model to see whether the issue
might captured there (if it matters I created a new variable i...
2012 Sep 10
1
Memory errors using lmer
...lattice_0.20-10
[4] RODBC_1.3-6
loaded via a namespace (and not attached):
[1] grid_2.14.0 nlme_3.1-104 stats4_2.14.0 tools_2.14.0
I run this code:
> install.packages("lme4")
> library(lme4)
> math07g4 <- sqlQuery(conn, "select ssid, ss_chg, campus2, district_id, pblack, pfreelnch, pmob
FROM codemob0607ma WHERE grade2 = 4")
> attach(math07g4)
> fit07ma4 <- lmer(ss_chg ~ 1 + factor(campus2) + factor(district_id) + pblack + pfreelnch + pmob +
(1 | campus2) + (1 | district_id), data=math07g4)
And I get this:
Error: cannot allocate vector o...