具有未知错误的Matplotlib散点图 [英] Matplotlib scatter plot with unknown error

问题描述

我正在尝试创建散点图.我有一个从0到17的数字列表以及一个包含18个值的数组.我可以将数据绘制为线形图，但是当我尝试将其绘制为散点图时，会收到一条错误消息，我听不懂:TypeError: ufunc 'sqrt' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe''

I am attempting to create a scatter plot. I have a list of numbers from 0 - 17 as well as an array with 18 values. I can plot the data as a line plot but when I try to plot as a scatter I get an error message I do not understand: TypeError: ufunc 'sqrt' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe''

此错误消息是什么意思，如何获取作为散点图绘制的数据?

What does this error message mean and how can I get the data to plot as a scatter?

import numpy as np
import matplotlib.pyplot as plt

y = [7316.0, 7453.25, 7518.25, 7711.5, 7448.0, 7210.25, 7416.75, 6960.75, 
     7397.75, 6397.5, 5522.75, 5139.0, 5034.75, 4264.75, 5106.0, 3489.5, 
     4712.0, 4770.0]
x = np.arange(0,18,1)

plt.rcParams['legend.loc'] = 'best'
plt.figure(1)
plt.xlim(0, 20)
plt.ylim(0, 10000)
plt.scatter(x, y, 'r')
plt.show()

推荐答案

检查分散文档.第三个参数是点的大小，应为标量或类似array_.我假设'r'是彩色的，所以请执行以下操作:

Check the scatter documentation. Third argument is for size of points and should be scalar or array_like. I assume 'r' is for color so do the following:

plt.scatter(x, y, c='r')

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