[R] Problems using hetcor (polycor)

[Birgitle]

Many Thanks Mark for your answer.

It seems than, that it is not possible to use all variables without somehow
imputing missing values.

But I will try which variables I can finally use.

Many thanks again.

B.


Mark Difford wrote:
> 
> Hi Birgitle,
> 
> It seems to be failing on those columns that have just a single "entry"
> (i.e = 1, with the rest as 0; having just 1, an <NA>, and then 0s gets you
> through). And there are other reasons for failure (in the call to get a
> positive definite matrix).
> 
> The main problem lies in the calculation of standard errors for some
> combinations. You can get a result for all columns by turning this off.
> You can get standard errors for all the columns up to 60 by omitting
> columns 12, 23, and 44.  You need to work out the rest yourself by
> "columning" forwards till you get a failure, then drop that column from
> the index. There probably isn't enough information to calculate SEs for
> the columns that cause an error.
> 
> ## This works with default settings but without columns 12, 23 and 44
> hetcor(TestPart[,c(1:11,13:22,24:43,45)], pd=T, std.err=T,
> use="complete.obs")
> 
> ## The first fails; the second works
> hetcor(TestPart[,c(1:11,13:22,24:43,45:60)], pd=T, std.err=F)
> hetcor(TestPart[,c(1:72)], pd=F, std.err=F)
> 
> HTH, Mark.
> 
> 


-----
The art of living is more like wrestling than dancing.
(Marcus Aurelius)
-- 
View this message in context: http://www.nabble.com/Problems-using-hetcor-%28polycor%29-tp18867343p18870543.html
Sent from the R help mailing list archive at Nabble.com.