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Text Values to Numerical Values for using PCA
I am trying to use PCA component, so it needs only numerical type values, I have a CSV which has kind of 5 or 6 attributes which contain text. I used the following:
Retrieve Data -> Text to Nominal operator -> Nominal to Numerical -> Replace Missing Values -> PCA
When I try to add the attributes in Text to Nominal the list is empty, so I added the attributes manually with the '+' but when I run it it says that the attributes don't exist in the input data.
Am I missing something?