Ranking features on the feature designer app

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Hi,
I'm trying my hands out at using the feature designer app and the clasification learner app for predictive maintenance.
I generated a bnch of time and frequency domain features but when i try to rank them using the one way anova algorthm, theres basically no ranking cos it gives all features a rank of zero. Im not sure if it means that all the features have equal rank or that all features are totally useless and contribute nothing. That would be weird since my case study measures pressure at different fault levels and basic stats like mean and sd at leats should be able to reasonable tell them apart.
Any ideas about why this is happening?

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