Getting TypeError: reduction operation 'argmax' not allowed for this dtype when trying to use idxmax()

Question

When using the idxmax() function in Pandas, I keep receiving this error.

Traceback (most recent call last):
  File \"/Users/username/College/yea         


        

Answer 1

In short, try this

best_c = results_table.loc[results_table['Mean recall score'].astype(float).idxmax()]['C_parameter']

instead of

best_c = results_table.loc[results_table['Mean recall score'].idxmax()]['C_parameter']