Python 将 Matplotlib 图形保存为全屏图像
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Saving Matplotlib graphs to image as full screen
提问by
I'm building a small graphing utility using Pandas and MatPlotLib to parse data and output graphs from a machine at work.
我正在使用 Pandas 和 MatPlotLib 构建一个小型图形实用程序，以解析工作中机器的数据和输出图形。
When I output the graph using
当我使用输出图形时
plt.show()
I end up with an unclear image that has legends and labels crowding each other out like so.
我最终得到了一个不清晰的图像，其中的图例和标签像这样相互挤在一起。
However, expanding the window to full-screen resolves my problem, repositioning everything in a way that allows the graph to be visible.
但是，将窗口扩展到全屏解决了我的问题，以允许图形可见的方式重新定位所有内容。
I then save the graph to a .png like so
然后我将图形保存到 .png 像这样
plt.savefig('sampleFileName.png')
But when it saves to the image, the full-screen, correct version of the plot isn't saved, but instead the faulty default version.
但是当它保存到图像时，全屏的、正确的绘图版本没有保存，而是有错误的默认版本。
How can I save the full-screen plt.show() of the plot to .png?
如何将绘图的全屏 plt.show() 保存为 .png？
I hope I'm not too confusing.
我希望我不要太困惑。
Thank you for your help!
感谢您的帮助！
采纳答案by gtlambert
The method you use to maximise the window size depends on which matplotlib backend you are using. Please see the following example for the 3 most common backends:
用于最大化窗口大小的方法取决于您使用的 matplotlib 后端。请参阅以下 3 个最常见后端的示例：
import matplotlib.pyplot as plt
plt.figure()
plt.plot([1,2], [1,2])
# Option 1
# QT backend
manager = plt.get_current_fig_manager()
manager.window.showMaximized()
# Option 2
# TkAgg backend
manager = plt.get_current_fig_manager()
manager.resize(*manager.window.maxsize())
# Option 3
# WX backend
manager = plt.get_current_fig_manager()
manager.frame.Maximize(True)
plt.show()
plt.savefig('sampleFileName.png')
You can determine which backend you are using with the command matplotlib.get_backend(). When you save the maximized version of the figure it will save a larger image as desired.
您可以通过命令确定正在使用的后端matplotlib.get_backend()。当您保存图形的最大化版本时，它将根据需要保存更大的图像。
回答by kmario23
回答by Westly White
For those that receive errors in the answers above, this has worked for me.
对于那些在上述答案中收到错误的人，这对我有用。
#Show full screen
mng = plt.get_current_fig_manager()
mng.full_screen_toggle()
回答by stepj
For everyone, who failed to save the plot in fullscreen using the above solutions, here is what really worked for me:
对于使用上述解决方案未能以全屏方式保存情节的每个人，以下是对我真正有用的内容：
figure = plt.gcf() # get current figure
figure.set_size_inches(32, 18) # set figure's size manually to your full screen (32x18)
plt.savefig('filename.png', bbox_inches='tight') # bbox_inches removes extra white spaces
You may also want to play with the dpi (The resolution in dots per inch)
您可能还想使用 dpi（每英寸点数的分辨率）
plt.savefig('filename.png', bbox_inches='tight', dpi=100)
