我的 fig1.savefig 函数将我的图形保存为空白屏幕，我该如何解决？答案

【问题标题】：My fig1.savefig function is saving my figure as a blank screen, how do I fix this?我的 fig1.savefig 函数将我的图形保存为空白屏幕，我该如何解决？
【发布时间】：2021-01-20 21:40:55
【问题描述】：

我正在通过 .csv 文件导入数据并绘制它，但是当我绘制我的图形并尝试将其保存到我的谷歌驱动器时，它只会保存一个没有任何数据的空白图像。我正在使用 Google Collaboratory。

这是我的代码：

#Displaying the Data


import matplotlib.pyplot as plt
import numpy as np
import pandas as pd

plt.title("Score of Each Raisan Thrown", fontsize ='x-large')

plt.ylabel("Valid Raisans Thrown", fontsize='large')
plt.xlabel("Score", fontsize= 'large')

dart = data[:,0]
score =  data[:,1]

plt.plot(score ,dart, marker='o', linestyle='none', color='black')

ax = plt.subplot()

ax.set_facecolor('seashell')

# Adding ticks to make my plot easier to understand/read

ax.set_yticks([20,40,60,80,100,120,140,160,180,200])
ax.set_xticks([-16,-14,-12,-10,-8,-6,-4,-2,0,2,4,6,8,10,12,14,-16])

fig = plt.figure(figsize=(10,5))

fig = plt.gcf()
plt.draw()
fig.savefig(datapath+'My Experiment1 Plot')

plt.show()

【问题讨论】：

标签： python python-3.x numpy matplotlib google-colaboratory

【解决方案1】：

因为你的

fig = plt.figure(figsize=(10,5))

fig = plt.gcf()
plt.draw()
fig.savefig(datapath+'My Experiment1 Plot')

出现在所有绘图命令之后，这意味着您正在创建一个新图形，而无需绘制任何内容，只需保存即可。你需要重新排列你的命令：

# get the data:
dart = data[:,0]
score =  data[:,1]

# set up the fig and axes:
fig, ax = plt.subplots(figsize=(10,5))

# plot the data
plt.plot(score ,dart, marker='o', linestyle='none', color='black')

# additional formatting
plt.title("Score of Each Raisan Thrown", fontsize ='x-large')
plt.ylabel("Valid Raisans Thrown", fontsize='large')
plt.xlabel("Score", fontsize= 'large')

# even more formatting
ax.set_facecolor('seashell')

# Adding ticks to make my plot easier to understand/read    
ax.set_yticks([20,40,60,80,100,120,140,160,180,200])
ax.set_xticks([-16,-14,-12,-10,-8,-6,-4,-2,0,2,4,6,8,10,12,14,-16])

fig.savefig(datapath+'My Experiment1 Plot')

plt.show()

【讨论】：