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"RegularExpression-bug?"
choose_username
Hi there,
i have a Data set which got lines looking like the following:
41, Private, 109912, Bachelors, 13, Never-married, Other-service, Not-in-family, White, Female, 0, 0, 40, ?, <=50K
From time to time there is a '?' . I wanted to replace it but RapidMiner didnt recognize it as a charakter.
I used the Replace-Operator and wrote in "replace what" a 'any character'- character from the regular expressions suggestions window. All other charaters were replaced but not the '?'.
Now i wanted to know if that is because of a bug or did i smth wrong ?
Greetings
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choose_username
I found the following out:
if i change the ending of the file to .arff then i cant filter the '?' out
if i change the ending of the file to .csv then the '?' gets filtered out.
Maybe this helps.
______________________
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cherokee
Hi choose_username,
RapidMiner uses '?' to denote a missing value. As there is no value given you cannot replace it (there is none). You can use either
Replace Missing Values
or
Impute Missing Values
, both from Data Transformation.Data Cleansing!
Best regards,
chero
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