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並前往https://stackoverflow.com/questions/56836996/how-can-i-create-frequency-matrix-using-all-columns

How can I create Frequency Matrix using all columns

dot. df.T.dot(df) # same as # df.T @ df c1 c2 c3 c4 c5 c1 1 1 1 1 0 c2 1 2 1 2 0 c3 1 1 1 1 0 c4 1 2 1 2 0 c5 0 0 0 0 0. You can use np.fill_diagonal to ...

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