Question

我正在绘制3D散点图，并打算根据y轴（国家/地区）标签的值为每个标记提供不同的颜色。我有以下代码。标记的颜色不是他们需要的。我认为我在for循环中做错了什么或效率低下。你能指出我所犯的错误吗？

from mpl_toolkits.mplot3d import Axes3D
import matplotlib.pyplot as plt
import numpy as np    

src = ['facebook', 'google', 'amazon','facebook','facebook','google']
year = [2014,2014,2013,2013,2012,2013]
country = ['uk','ru','de','us','uk','us']
avg = [154,267,187,312,274,439]
colors = {'uk' : 'b',
          'de' : 'y',
          'ru' : 'r', 
          'us' : 'c'}

unique_src, idx_src = np.unique(src, return_inverse=True)
unique_cty, idx_cty = np.unique(country, return_inverse=True)
fig = plt.figure()
ax = fig.add_subplot(111, projection='3d')
for col, val in zip(colors, country):
    ax.scatter(idx_src, idx_cty, year, s=avg, c=colors[val])
plt.yticks(range(len(unique_cty)), unique_cty, rotation=340)
plt.xticks(range(len(unique_src)), unique_src, rotation=45, horizontalalignment='right')
ax.set_zticks(np.unique(year))
plt.show()

另外，在调用分散功能时，我无法写：
ax.scatter(source, country, year, s=avg, c=colors[val])

因为我收到以下错误信息：

ValueError：无法将字符串转换为float：facebook

为什么会这样？我正在使用matplotlib版本2.1.2

Answer 1

您似乎希望按国家/地区着色点。

private void setListeners() {
    findViewById(R.id.thirdText).setOnClickListener(new View.OnClickListener() {
        @RequiresApi(api = Build.VERSION_CODES.KITKAT)
        @Override
        public void onClick(final View v) {
            final Scene scene3 = Scene.getSceneForLayout((ViewGroup) findViewById(R.id.mainlayout),
            R.layout.scene_3, MainActivity.this);
            Transition mFadeTransition = new ChangeBounds();
            TransitionManager.go(scene3, mFadeTransition);
            setListeners();
        }
    });

    findViewById(R.id.firsttext).setOnClickListener(new View.OnClickListener() {
        @RequiresApi(api = Build.VERSION_CODES.KITKAT)
        @Override
        public void onClick(final View v) {
            final Scene scene1 = Scene.getSceneForLayout((ViewGroup) findViewById(R.id.mainlayout),
            R.layout.activity_main, MainActivity.this);
            Transition mFadeTransition = new ChangeBounds();
            TransitionManager.go(scene1,mFadeTransition);
            setListeners();
        }
    });

    findViewById(R.id.secondText).setOnClickListener(new View.OnClickListener() {
        @RequiresApi(api = Build.VERSION_CODES.KITKAT)
        @Override
        public void onClick(final View v) {
            final Scene scene2 = Scene.getSceneForLayout((ViewGroup) findViewById(R.id.mainlayout),
            R.layout.scene_2, MainActivity.this);
            Transition mFadeTransition = new ChangeBounds();
            TransitionManager.go(scene2, mFadeTransition);
            setListeners();
        }
    });
}

完整示例：

c = [colors[val] for val in country]
ax.scatter(idx_src, idx_cty, year, s=avg, c=c)

matplotlib：根据标签值

1 个答案: