Error in nlminb(), NA/NaN gradient evaluation
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Description
Hello,
I am following your instruction. However, I keep getting this error message:
Warning: NAs producedWarning: NA/NaN function evaluationError in nlminb(start = c(beta_init, sigma2_init), objective = function(par) { :
NA/NaN gradient evaluation
Since proDA() can handle missing values, why do I get this error? What should I do to solve this?
Thanks in advance.
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