ValueError:x和y不能大于2-D，但具有形状(2，1，1)和(2，)

Question

源代码

cyprus_predicted_life_satisfaction = lin1.predict(cyprus_gdp_per_capita)[0][0]
#cyprus_predicted_life_satisfaction = lin1.predict(cyprus_gdp_per_capita)
cyprus_predicted_life_satisfaction

输出：array([[5.96244744]])

sample_data.plot(kind='scatter', x="GDP per capita", y='Life satisfaction', figsize=(5,3), s=1)
X=np.linspace(0, 60000, 1000)
plt.plot(X, t0 + t1*X, "b")
plt.axis([0, 60000, 0, 10])
plt.text(5000, 7.5, r"$theta_0 = 4.85$", fontsize=14, color="b")
plt.text(5000, 6.6, r"$theta_1 = 4.91 times 10^{-5}$", fontsize=14, color="b")
plt.plot([cyprus_gdp_per_capita, cyprus_gdp_per_capita], [0, cyprus_predicted_life_satisfaction], "r--")
plt.text(25000, 5.0, r"Prediction = 5.96", fontsize=14, color="b")
plt.plot(cyprus_gdp_per_capita, cyprus_predicted_life_satisfaction, "ro")
save_fig('cyprus_prediction_plot')
plt.show()

错误

---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-36-c7d7af89ced4> in <module>
5 plt.text(5000, 7.5, r"$theta_0 = 4.85$", fontsize=14, color="b")
6 plt.text(5000, 6.6, r"$theta_1 = 4.91 times 10^{-5}$", fontsize=14, color="b")
----> 7 plt.plot([cyprus_gdp_per_capita, cyprus_gdp_per_capita], [0, cyprus_predicted_life_satisfaction], "r--")
8 plt.text(25000, 5.0, r"Prediction = 5.96", fontsize=14, color="b")
9 plt.plot(cyprus_gdp_per_capita, cyprus_predicted_life_satisfaction, "ro")
~/anaconda3/lib/python3.7/site-packages/matplotlib/pyplot.py in plot(scalex, scaley, data, *args, **kwargs)
2809     return gca().plot(
2810         *args, scalex=scalex, scaley=scaley, **({"data": data} if data
-> 2811         is not None else {}), **kwargs)
2812 
2813 
~/anaconda3/lib/python3.7/site-packages/matplotlib/__init__.py in inner(ax, data, *args, **kwargs)
1808                         "the Matplotlib list!)" % (label_namer, func.__name__),
1809                         RuntimeWarning, stacklevel=2)
-> 1810             return func(ax, *args, **kwargs)
1811 
1812         inner.__doc__ = _add_data_doc(inner.__doc__,
~/anaconda3/lib/python3.7/site-packages/matplotlib/axes/_axes.py in plot(self, scalex, scaley, *args, **kwargs)
1609         kwargs = cbook.normalize_kwargs(kwargs, mlines.Line2D._alias_map)
1610 
-> 1611         for line in self._get_lines(*args, **kwargs):
1612             self.add_line(line)
1613             lines.append(line)
~/anaconda3/lib/python3.7/site-packages/matplotlib/axes/_base.py in _grab_next_args(self, *args, **kwargs)
391                 this += args[0],
392                 args = args[1:]
--> 393             yield from self._plot_args(this, kwargs)
394 
395 
~/anaconda3/lib/python3.7/site-packages/matplotlib/axes/_base.py in _plot_args(self, tup, kwargs)
368             x, y = index_of(tup[-1])
369 
--> 370         x, y = self._xy_from_xy(x, y)
371 
372         if self.command == 'plot':
~/anaconda3/lib/python3.7/site-packages/matplotlib/axes/_base.py in _xy_from_xy(self, x, y)
232         if x.ndim > 2 or y.ndim > 2:
233             raise ValueError("x and y can be no greater than 2-D, but have "
--> 234                              "shapes {} and {}".format(x.shape, y.shape))
235 
236         if x.ndim == 1:
ValueError: x and y can be no greater than 2-D, but have shapes (2, 1, 1) and (2,)

尝试过的解决方案

• 这个问题在相反的1D和3D中有尺寸问题，在我的情况下是3D和1D-绘制图像的问题'；s傅立叶变换"ValueError：x和y可以不大于2-D，但具有形状(2592，(和(2592、1、3(">
• 无答案：错误：x和y不能大于2-D，但具有形状(2，(和(2150000，1(
• 无答案-x和y可以不大于2-D，但具有形状(1，(和(1，224224，3(

Answer 1

您需要使用reshape:

a = np.random.random(size=(2, 1, 1))
a.shape
>> (2, 1, 1)
a = a.reshape(-1,)
a.shape
>> (2,)

如果这不能解决您的问题，请提供样本数据。