Re: [R] lrm in Design package--missing value where TRUE/FALSE needed

annie Zhang wrote: Hi, Frank, I met the same problem. My data does not have NA, when I run fit <- lrm(Y_t~.,data=X) The error message is: singular information matrix in lrm.fit (rank= 35 ). Offending variable(s): X35 Error in j:(j + params[i] - 1) : NA/NaN argument How can I avoid this? T

Re: [R] lrm in Design package--missing value where TRUE/FALSE needed

Hi, Frank, I met the same problem. My data does not have NA, when I run fit <- lrm(Y_t~.,data=X) The error message is: singular information matrix in lrm.fit (rank= 35 ). Offending variable(s): X35 Error in j:(j + params[i] - 1) : NA/NaN argument How can I avoid this? Thank you, Annie On Fri,

Re: [R] lrm in Design package--missing value where TRUE/FALSE needed

Ping-Hsun Hsieh wrote: Hi, A error message arose while I was trying to fit a ordinal model with lrm() I am using R 2.8 with Design package. Here is a small set of mydata: RC RS Sex CovACovBCovCCovDCovE 2 1 0 1 1 0 -0.005575280

Re: [R] lrm in Design package--missing value where TRUE/FALSE needed

The idea of estimating 7 parameters from 11 cases using mostly binary variables just seems begging for a singular matrix. On Sep 4, 2009, at 3:59 PM, Ping-Hsun Hsieh wrote: Hi, A error message arose while I was trying to fit a ordinal model with lrm() I am using R 2.8 with Design package.

[R] lrm in Design package--missing value where TRUE/FALSE needed

Hi, A error message arose while I was trying to fit a ordinal model with lrm() I am using R 2.8 with Design package. Here is a small set of mydata: RC RS Sex CovACovBCovCCovDCovE 2 1 0 1 1 0 -0.0055752802 2 1 0