pivot_table values missing

Question

I just simply reshape the dataframe as my wish. index is userid, and columns are subgameID, filled with rating as values. But all values become missing data.

Answer 1

Just for the record - if you only check 2 columns like that, why don't you use pd.crosstab?

pd.crosstab(ratings_data.userID, ratings_data.subgameId, margins=True)

If you need pivot_table, then try to add argument fillna = 0 .

You can also try to do it on small subsample of the data - maybe the NaNs are properly introduced (many userID belonged to only small subset of subgameID)?