博客

问题：在用python3使用knn.train(trainData,responses)的时候，可能会产生错误：TypeError:onlysize-1arrayscanbeconvertedtoPythonscalars

newcomer=np.random.randint(0,100,(1,2)).astype(np.float32)

plt.scatter(newcomer[:,0],newcomer[:,1],80,’g’,’o’)

knn=cv2.ml.KNearest_create()

knn.train(trainData,responses)

报错信息：

—————————————————————————

TypeErrorTraceback(mostrecentcalllast)

in()

2plt.scatter(newcomer[:,0],newcomer[:,1],80,’g’,’o’)

3knn=cv2.ml.KNearest_create()

—->4knn.train(trainData,responses)

5

TypeError:onlysize-1arrayscanbeconvertedtoPythonscalars

解决：将knn.train(trainData,responses)替换为：

knn.train(trainData,cv2.ml.ROW_SAMPLE,responses)

分析：

在python3中，knn.train需要传入layout参