title: using cross validation for calculating specificity
body: <p>I want to use cross-validation for calculating specificity. I found code for calculating accuracy, really, f1-score, and precision. but I couldn't found for specificity.
  for example, the code for f1-score is like:</p>
  <pre><code>cross_val_score(SVC, X, y, scoring=&quot;f1&quot;, cv = 7)
  </code></pre>
  <p>or for precision is like:</p>
  <pre><code>cross_val_score(SVC, X, y, scoring=&quot;precision&quot;, cv = 7)
  </code></pre>