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# how can i calculate entropy and standard deviation of one numeric feature for each record?

Member Posts: 14 Learner III
edited November 2018 in Help

hi

i am new in rapidminer and i want to calculate entropy and standard deviation of one feature for each record of example set... i cant find this operator.... how i can do it????

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• Administrator, Moderator, Employee, RapidMiner Certified Analyst, Community Manager, Member, University Professor, PM Moderator Posts: 2,959 Community Manager

hello @ramzanzadeh72 - welcome to the community. I'm confused with your question. How do you calculate the standard deviation of only one number? If you want to calculate the standard deviation of an entire column/feature, you can do this easily with the Aggregate operator.

Scott

• Member Posts: 14 Learner III

yes, actually i want to calculate entropy and standard deviation of one feature for entire records... standard devation can be calculate by "aggregate operator" but what about entropy???

• Administrator, Moderator, Employee, RapidMiner Certified Analyst, Community Manager, Member, University Professor, PM Moderator Posts: 2,959 Community Manager

hmm I have never heard this request before. IFAIK the only way to do this would be to compute the formula with a Generate Macro operator.

Scott

• RapidMiner Certified Analyst, RapidMiner Certified Expert, Member Posts: 1,761 Unicorn

@ramzanzadeh72 I assume you are referring to Information theory. So there's a few ways to do it. There's an operator called Discretize by Entropy and there is are some weighting operators using Information Gain.

• RapidMiner Certified Analyst, RapidMiner Certified Expert, Member Posts: 1,761 Unicorn