Highest Rated Posts

rfuentealba

May 12

Re: Feature Selection

Hello, again! Stop! Stop! Stop! Don't make that answer the right one! (My pride says "delete your answer", but my OCD says "leave it there"). TIL that it is more common if we put feature selection inside the cross validation process because otherwise it would lead to biased results. Thanks to @varunm1 for the several links he has sent me. I actually got confused (too many hours programming stuff, you know) but this article got clarity for me: https://rapidminer.com/blog/learn-right-way-validate-models-part-4-accidental-contamination/. Despite my lapsus (and understanding the question), I can now focus on this: (Quote) Let's see: * On each cross validation fold, the selected features will differ. * In the RapidMiner documentation for the Cross Validation operator, it says: (Quote) So, the correct answer is: You get the model trained with all the data (not a specific fold), but only if you connect the mod port somewhere else. The model trained will use the best features found for all of these, though. All the best, Rodrigo.

varunm1

April 23

Re: Error when executing operator

Hello, The user need to check the python path in Settings --> Preferences --> Python Scripting window. Here they need to set the python path and test to see if everything is fine. Screenshot below.

yyhuang

April 17

Re: Precision of Optimize Parameters Operator?

Hi @Jugi, You can change the settings for display of numbers. It is not precision issues IMO, it is just a preference setup for display all the fractional numbers. Go to menu Settings >> Preferences ... After increasing the number of digits to show, you can get a refreshed list here Best, YY

Telcontar120

April 3

Re: Concatenate Two Numbers

IF you are ok having the resulting field be a numerical instead of nominal, you don't need to concatenate at all.  Just use Generate Attributes to multiply the year by 100, and then add the month number.  So you get 201901, 201902, ...201912.  Like @yyhuang's format, only as a numerical.  This is the way I usually prefer to handle this type of year and month combination.

kypexin

April 1

Replace medium rare values

Hi there,  I am applying REPLACE MEDIUM RARE VALUES operator, and the default doneness it offers is medium well; however, this is not always the desired setting. Is there a way to explicitly set default doneness to rare or medium?  Second question, what is the best practice of applying salt and pepper - before or after replacement?

SGolbert

March 8

Re: Combining RapidMiner with Python and R

Hi @mlg1988 in my opinion R and Python help cover some niche cases which RapidMiner not yet covers, or does it poorly (e.g.: the web mining extension). If you work with the RapidMiner platform, you don't really need to program much, only a few lines to get some special functionality, via the scripting operators. The project framework that RM gives you is unparalleled in the R and Python world. There are some cases when some tasks are easier to do with a script than in RapidMiner, in those cases I would insist with RM for a given time, because once you solve a problem in RM, the future use of the process (changes, debugging, operationalization) is better if you don't depend on external tools. Regards, Sebastian

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