nack , Sean Owen
Cc: user
Subject: [EXTERNAL] 回复：Re: 回复：Re: calculate correlation
between_multiple_columns_and_one_specific_column_after_groupby_the_spark_data_frame
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Thanks, Enrico.I just found that I need to group the data frame then calculate
the correlation. So I will get a list of dataframe, not columns. So I used
following solution:use following codes to create a mutable data frame df_all. I
used the first datacol to calculate correlation.
