Highest Rated Posts

Telcontar120

April 22

Re: Ideal ratio with respect to scoring dataset and training dataset

The ideal ratio is to use cross validation. :) There is a reason this is considered the "gold standard" for validation. This approach ensures that 100% of the data is used in both training and testing. Otherwise you are inviting bias from random effects of which records are in your training set vs your testing set. I…

MarcoBarradas

March 31

Re: Easiest way to remove "count" in front of attribute name

@jhiKl this is the regex you need Let me explain * .* matches all the characters before the ( * \( escapes the "(" you are trying to find * (\w+) tells that you want to capture all the word characters \w+ until the next rule * Please notice the difference when you try to find a "(" =\( from when you are trying to capture…

Edin_Klapic

March 2

Re: replace hyphen

Hi @pb42 ,in the Replace Operator you need to use the expression ^-$ in the replace what parameter and replace it by Not indicated.That way only the single hyphens are replaced and the minuses (i.e. A-, B-,...) are kept.Short explanation: RapidMiner uses the Java RegEx functions: The ^ represents the beginning of a line,…

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