擅长：python、mysql、java
<p><strong>精确性、召回率、F1分数</strong>和<strong>精确性</strong>计算</p>
<pre><code>- In a given image of Dogs and Cats
* Total Dogs - 12 D = 12
* Total Cats - 8 C = 8
- Computer program predicts
* Dogs - 8
5 are actually Dogs T.P = 5
3 are not F.P = 3
* Cats - 12
6 are actually Cats T.N = 6
6 are not F.N = 6
- Calculation
* Precision = T.P / (T.P + F.P) => 5 / (5 + 3)
* Recall = T.P / D => 5 / 12
* F1 = 2 * (Precision * Recall) / (Precision + Recall)
* F1 = 0.5
* Accuracy = T.P + T.N / P + N
* Accuracy = 0.55
</code></pre>
<p>维基百科<a href="https://en.wikipedia.org/wiki/Precision_and_recall" rel="noreferrer">reference</a></p>
