The Rand score

The Rand score shows how similar a cluster is to the benchmark classification and computes the percentage of correctly made decisions. A lower value is preferable because this represents distinct clusters. This can be calculated as follows:

Here, the following applies:

• TP: Total number of true positives
• TN: Total number of true negatives
• FP: Total number of false positives
• FN: Total number of false negatives