Re: [R] lrm in Design package, missing value problem

2009-08-23 Thread Frank E Harrell Jr
James Fearon wrote: Hi, This concerns lrm in the Design package, which I need for the clustered errors option with panel data. I have created a variable (using sign()) that has values -1, 0, and 1 (and some NAs). call this variable x3. lrm does not like t = lrm(y ~ x1 + x2 + I(x3==-1) +

[R] lrm in Design package, missing value problem

2009-08-23 Thread James Fearon
Hi, This concerns lrm in the Design package, which I need for the clustered errors option with panel data. I have created a variable (using sign()) that has values -1, 0, and 1 (and some NAs). call this variable x3. lrm does not like t = lrm(y ~ x1 + x2 + I(x3==-1) + I(x3==1), data=data,x

[R] lrm in Design package, missing value problem

2009-08-23 Thread James Fearon
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