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"Decision tree shows only the label"
I have a data set of Sales from B2B that I am trying to dig in using a "Decision Tree". The attributes are: Country (Polynominal), State (Polynominal), DaysInSalePhase (integer), MonthlySales (integer), Deal (Binominal). I set the "Deal" attribute (which is a "Won" or "Lost" column) as the label. But the decision tree almost never show attribute such Country, State, but focus only on integer values. If i want to see something in the decision tree, I have to disable all the prunning options (which is not the best, isn't it ?), and most of the time the decision tree is only a box showing me the the number of "Won" and "Lost".
Any idea what I am doing wrong ? Does my data aren't good enough?