Matplotlib.pyplot:打开新图形环境 [英] Matplotlib.pyplot: Open new figure environment

问题描述

在pyplot中，当我运行plt.plot(x)时，它似乎在内部运行以下逻辑:

In pyplot, when I run plt.plot(x), it seems to internally run the following logic:

1)如果一个图形已经打开，请使用该图形，否则请创建一个新图形.
2)如果该图中的轴已经打开，请使用该轴，否则请创建一个新轴.
3) 在该轴上绘图.

1) If a figure is already open, use that figure, otherwise create a new one.
2) If an axes in that figure is already open, use that axes, otherwise create a new one.
3) Plot on that axis.

我想知道如何在下次调用某些绘图命令时强制步骤 (1) 打开一个新图形.类似的东西

I'm wondering how I can force step (1) to open up a new figure the next time some plotting command is called. Something like

plt.plot(x1)
with new_figure_environment():  # Ensure that plot commands within this go to new figures
    some_function()
plt.show()

如果 some_function 包含:

def some_function():
    plt.plot(x1)

然后我想打开一个新图形，但如果它不包含绘图功能，那么我不.

Then I want to open up a new figure, but if it does not contain a plot function then I do not.

推荐答案

如果您想使用 fig1 = plt.figure(1), fig2 以特定图形编号绘制图形= plt.figure(2)等.要在特定图形中绘制图形，请定义轴 ax1 = fig1.gca() gca =获取当前轴，而不是使用 plt.plot()，请使用 ax1.plot() 绘制在图 1

If you want to plot in a specific figure number your figure using fig1 = plt.figure(1), fig2 = plt.figure(2) etc. To plot a graph in a specific figure define axes ax1 = fig1.gca() gca = get current axis and instead of using plt.plot() use ax1.plot() to plot in the figure 1

import matplotlib.pyplot as plt 

x1 = [0,1]
x2 = [0,2]

y1 = [0,1]
y2 = [0,-1]

fig1 = plt.figure(1)
ax1 = fig1.gca()

fig2 = plt.figure(2)
ax2 = fig2.gca()


ax1.plot(x1,y1,'b')
ax2.plot(x2,y2,'r')

plt.show()

如果要创建5个数字，请使用列表:

If you want to create 5 figures use lists :

fig = []
ax = []
for i in range(5) :
    fig.append(plt.figure(i))
    ax.append(fig[i].gca())

如果图1已经打开，并且您想绘制其他曲线，则只需键入以下线条:

if the figure 1 is already opened and you want to plot an additional curve you just have to type these lines :

fig3 = plt.figure(1)
ax3 = fig1.gca()
ax3.plot(x1,y2,'g') 
fig3.canvas.draw()

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