Thanks Sarah for the response; with the command
str(echoknn.train)
the coloumn "class" is a "logi" value (i think without any immagination that
is a logical value ). So, how can I handle this type of data?
Thanks a lot.
P.S. Yes, is a course assignment and i was hoping to solve this problem
(that i consider just a beginner problem) without asking my teacher .
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