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(SOLVED) Wrong Correlation Matrix Output
i just started working with rapidminer and have a problem using a correlation matrix:
My database is an excel sheet. The feed into Rapidminer works, however when i connect a correlation matrix operator next to it, the results in the matrix show many "?" instead of values between -1 and 1. Single cells show actual values, however some of them are outside of the normal -1 to What does this mean? I have 15 attributes, is that to much?!
Thank you very much in advance