# NAME AI::ConfusionMatrix - make a confusion matrix # SYNOPSIS my %matrix; Loop over your tests --- $matrix{$expected}{$predicted} += 1; --- makeConfusionMatrix(\%matrix, 'output.csv'); # DESCRIPTION This module prints a [confusion matrix](https://en.wikipedia.org/wiki/Confusion_matrix). ### function #### `makeConfusionMatrix($hash_ref, $filename)` This function makes a confusion matrix from `$hash_ref` and writes it to `$filename`. Example: makeConfusionMatrix(\%matrix, 'output.csv'); The hash reference must look like this : $VAR1 = { 'value_expected1' => { 'value_predicted1' => value }, 'value_expected2' => { 'value_predicted1' => value, 'value_predicted2' => value }, 'value_expected3' => { 'value_predicted3' => value } }; The output will be in CSV. Here is an example: ,1997,1998,2001,2003,2005,2008,2012,2015,TOTAL,TP,FP,FN,ACC 1997,1,,,,,,,1,2,1,0,1,50.00% 1998,,1,,,,,,,1,1,0,0,100.00% 2001,,,1,,,,,,1,1,0,0,100.00% 2003,,,,5,,,,2,7,5,0,2,71.43% 2005,,,,,5,,,4,9,5,0,4,55.56% 2008,,,,,,3,,,3,3,0,0,100.00% 2012,,,,,,,5,,5,5,0,0,100.00% 2015,,,,,,,,2,2,2,7,0,100.00% - TP: True Positive - FP: False Positive - FN: False Negative - ACC: Accuracy # AUTHOR Vincent Lequertier # LICENSE This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.