在spaCy中绘制PR曲线可以使用以下步骤:
pip install spacy scikit-learn matplotlib
import spacy
from sklearn.metrics import precision_recall_curve
import matplotlib.pyplot as plt
nlp = spacy.load("en_core_web_sm")
texts = ["Some text", "Another text"]
true_labels = [True, False]
predictions = [nlp(text).cats["LABEL"] > 0.5 for text in texts]
precision_recall_curve
函数计算PR曲线的精确度和召回率:precision, recall, _ = precision_recall_curve(true_labels, predictions)
plt.plot(recall, precision, marker='.')
plt.xlabel('Recall')
plt.ylabel('Precision')
plt.title('Precision-Recall curve')
plt.show()
这样就可以在spaCy中绘制PR曲线了。记得根据你的实际情况调整代码中的数据和参数。