Python Matplotlib颜色分配错误？

我试图根据数组中的数据绘制一个彩色散点图：

plt.scatter(150, 93, c=y_pred)

这里，

y_pred

是：

array([ 5,  6,  8, 16, 21, 12, 12, 13,  6,  6, 17, 11,  6, 12, 12, 23,  6,
        6, 15,  6,  6,  6,  6,  6,  6, 23, 22,  6, 12, 17,  6, 20,  0,  6,
        6, 12, 12,  0,  6,  6,  6,  6,  6,  6,  5, 17,  6,  6, 11, 10, 13,
        6, 22, 24, 23,  6,  6, 13,  6,  6,  6, 12,  9, 15, 13, 14,  6, 18,
        1,  6,  9,  6,  6, 11,  6,  5, 16,  9, 23,  2, 14, 24,  9,  5,  9,
       10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,  1,  6, 19,  6, 23,  3,
       20, 10,  4,  8,  9,  6,  6,  9, 22, 23,  6,  6, 11,  6,  6,  6, 22,
       24, 14,  4,  7, 12,  6, 19,  6, 12,  3, 22,  6, 11,  6, 21, 23,  4,
        6,  6,  6,  4, 10, 22, 15,  6,  6, 18,  6, 14,  4,  5], dtype=int32)

这给了我一个错误：

ValueError:无效的RGBA参数：17

---

我不明白为什么。同样的解决方案也适用于。您能帮我理解错误吗？

您只需在

x=150处添加一个分散点；y=93

但您尝试为此值指定150种颜色

plt.scatter(150, 93)

如果您传入与

c

形状相同的

x

和

y

，则此功能有效：

plt.scatter(np.random.random(150), np.random.random(150), c=y_pred)