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What seems to be the problem in this case?

cjjc20001

I am trying Lightgbm with a dataset. It is giving the following error.

Image: https://us.v-cdn.net/6030995/uploads/editor/ut/ukio6dhtojh4.jpg

Sample data are gender, degree concentration etc. Mostly ready-made options coming from a survey where the participant just selects the most appropriate option.

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MartinLiebig

Hi,

looks like your text field has categories in application which werent present in training.

BR,

Martin

cjjc20001

I think the problem is that there are data instances that only occur once, and during the sampling, this occurrence is not chosen by the training data; hence during the validation; they are marked as unrecognized. When I removed the split, it worked. However, I need to train and test the model. I utilized cross-validation but it has the same problem. What is the solution for this?

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