Question

我正在尝试如何缩放整个图形，而不仅仅是图中的子图。以下代码是略微修改的matplotlib示例，并显示可以手动调整子图轴限制。同样，框缩放仅允许放大子图（或链接的子图）。如何缩放整个图形？

from matplotlib.pyplot import figure, show
import numpy
figsrc = figure()

axsrc = figsrc.add_subplot(121, xlim=(0,1), ylim=(0,1), autoscale_on=False)
axzoom = figsrc.add_subplot(122, xlim=(0.45,0.55), ylim=(0.4,.6),
                                                autoscale_on=False)
axsrc.set_title('Click to zoom')
axzoom.set_title('zoom window')
x,y,s,c = numpy.random.rand(4,200)
s *= 200

axsrc.scatter(x,y,s,c)
axzoom.scatter(x,y,s,c)

def onpress(event):
    if event.button!=1: return
    x,y = event.xdata, event.ydata
    axzoom.set_xlim(x-0.1, x+0.1)
    axzoom.set_ylim(y-0.1, y+0.1)
    figsrc.canvas.draw()

figsrc.canvas.mpl_connect('button_press_event', onpress)
show()

Answer 1

执行此操作的一种方法是使用canvas.resize resize方法。

请注意，主页按钮不会恢复原始视图。我无法跟踪toolbar.home（）方法，而不是对QtCore.Qt.Key_Home的引用：backend_qt5.py中的'home'：

from matplotlib.pyplot import figure, show
import numpy
figsrc = figure()

axsrc = figsrc.add_subplot(121, xlim=(0,1), ylim=(0,1), autoscale_on=False)
axzoom = figsrc.add_subplot(122, xlim=(0.45,0.55), ylim=(0.4,.6),
                                                autoscale_on=False)
axsrc.set_title('LMB to zoom in, RMB to zoom out')
axzoom.set_title('zoom window')
x,y,s,c = numpy.random.rand(4,200)
s *= 200

axsrc.scatter(x,y,s,c)
axzoom.scatter(x,y,s,c)

def onpress(event):
    if event.button==1: 
        zoomIn()
    elif event.button==3:
        zoomOut()

def zoomIn():
    aw, ah = figsrc.canvas.get_width_height()
    aw *= 1.2
    ah *= 1.2
    figsrc.canvas.resize(aw, ah)
    figsrc.canvas.draw()

def zoomOut():
    aw, ah = figsrc.canvas.get_width_height()
    if (aw !=0) and (ah != 0):
        aw /= 1.2
        ah /= 1.2
        figsrc.canvas.resize(aw, ah)
        figsrc.canvas.draw()


figsrc.canvas.mpl_connect('button_press_event', onpress)
show()

Matplotlib放大整个数字

1 个答案: