So apparently you can output the human-readable model in text format, or output the instances with their classifications, but not both.
 
If I run
 
java weka.classifiers.functions.SimpleLogistic -I 0 -M 500 -H 50 -W 0.0 -t input.arff > model.arff
 
the human-readable model, which would get outputted to the screen, gets piped to model.arff.
 
However, if I run
 
java weka.classifiers.functions.SimpleLogistic -I 0 -M 500 -H 50 -W 0.0 -t input.arff -classifications \"weka.classifiers.evaluation.output.prediction.CSV -suppress -p 1,2 -distribution -file predictions.arff\" -no-cv
 
the human-readable model never gets printed to the screen, and so trying to pipe it to another file (model.arff) is useless.
 
Is there any way to output both the model and the classifications?
 
Jeff