Mlogit missing value problem
Hi,
19.12.2011 11:12, Ville Iiskola wrote:
Error in if (abs(x - oldx)< ftol) { : missing value where TRUE/FALSE
needed
The reason for this error is in the row 563. There the choice has
value 1 and Ie has missing value. If the choice has value 0 and Ie
has missing values, then there is no errors.
What should i do to make it work..?
How about excluding all rows having the combination "choice=1" and "Ie=NA" by using the function 'subset'? Or would this destroy/skew your data? HTH, Kimmo