Shows how to turn a correlation matrix into a table

convert_correlation_matrix_to_table.py

>>> corr
               Impressions    Clicks  CTR  Avg. CPC      Cost  Avg. position  \
Impressions       1.000000  0.599646  NaN  0.301556  0.568137       0.197353   
Clicks            0.599646  1.000000  NaN  0.566357  0.987073       0.627268   
CTR                    NaN       NaN  NaN       NaN       NaN            NaN   
Avg. CPC          0.301556  0.566357  NaN  1.000000  0.663789       0.809944   
Cost              0.568137  0.987073  NaN  0.663789  1.000000       0.707918   
Avg. position     0.197353  0.627268  NaN  0.809944  0.707918       1.000000   
Conversions       0.558450  0.927165  NaN  0.717237  0.962034       0.746493   

               Conversions  
Impressions       0.558450  
Clicks            0.927165  
CTR                    NaN  
Avg. CPC          0.717237  
Cost              0.962034  
Avg. position     0.746493  
Conversions       1.000000  

corr.where(np.triu(np.ones(corr.shape)).astype('bool')).stack().reset_index().rename(columns={'level_0': 'Row', 'level_1': 'Column', 0: 'Value'})

              Row         Column     Value
0     Impressions    Impressions  1.000000
1     Impressions         Clicks  0.599646
2     Impressions       Avg. CPC  0.301556
3     Impressions           Cost  0.568137
4     Impressions  Avg. position  0.197353
5     Impressions    Conversions  0.558450
6          Clicks         Clicks  1.000000
7          Clicks       Avg. CPC  0.566357
8          Clicks           Cost  0.987073
9          Clicks  Avg. position  0.627268
10         Clicks    Conversions  0.927165
11       Avg. CPC       Avg. CPC  1.000000
12       Avg. CPC           Cost  0.663789
13       Avg. CPC  Avg. position  0.809944
14       Avg. CPC    Conversions  0.717237
15           Cost           Cost  1.000000
16           Cost  Avg. position  0.707918
17           Cost    Conversions  0.962034
18  Avg. position  Avg. position  1.000000
19  Avg. position    Conversions  0.746493
20    Conversions    Conversions  1.000000