Does test file in weka requires same or less number of features as train?

Question

I have prepared two different .arff files from two different datasets one for testing and other for training. Each of them have equal instances but different features chang

Answer 1

How do I divide a dataset into training and test set?

You can use the RemovePercentage filter (package weka.filters.unsupervised.instance).

In the Explorer just do the following:

training set:

-Load the full dataset

-select the RemovePercentage filter in the preprocess panel

-set the correct percentage for the split

-apply the filter

-save the generated data as a new file

test set:

-Load the full dataset (or just use undo to revert the changes to the dataset)

-select the RemovePercentage filter if not yet selected

-set the invertSelection property to true

-apply the filter

-save the generated data as new file