Concordant Discordant Ratio

This is an evalution metric that measures the ratio of concordant to discordant pairs, used in classification problems. It is used for seeing whether 2 data points match or not.

This metric is used in another metric called Kendall Tau's Rank Correlation Coefficient which we will see later on.

Let us understand this with an example.

Example

Here we see tabular data of customers who go to a supermarket. It shows the number of times they go to the supermarket, the their satisfaction rating,both ranging from 1 to 5. (1 being the lowest and 5 being the highest)