I had a simple problem to solve: rearrange the order of columns in my arff files. Despite being simple, I wasted one too many hours struggling to find a way to use WEKA to edit my arff files. The built in arff viewer and experimenter failed to successfully save any changes made to the them. I was about the give up and just code up my own script to do the job, but, luckily, I found that the filters in the explorer has a rearrange filter that can successfully alter and save the arff file.
It's in:
filters -> unsupervised -> attribute -> reorder
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