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Matplotlib subplots_adjust hspace所以標題和xlabels不重疊?

[英]Matplotlib subplots_adjust hspace so titles and xlabels don't overlap?

例如,在matplotlib中有3行子圖, xlabels可以與下一行的標題重疊。 一個人必須擺弄pl.subplots_adjust(hspace) ,這很煩人。

是否有hspace的配方可以防止重疊並適用於任何nrow?

""" matplotlib xlabels overlap titles ? """
import sys
import numpy as np
import pylab as pl

nrow = 3
hspace = .4  # of plot height, titles and xlabels both fall within this ??
exec "\n".join( sys.argv[1:] )  # nrow= ...

y = np.arange(10)
pl.subplots_adjust( hspace=hspace )

for jrow in range( 1, nrow+1 ):
    pl.subplot( nrow, 1, jrow )
    pl.plot( y**jrow )
    pl.title( 5 * ("title %d " % jrow) )
    pl.xlabel( 5 * ("xlabel %d " % jrow) )

pl.show()

我的版本:

  • matplotlib 0.99.1.1,
  • Python 2.6.4,
  • Mac OSX 10.4.11,
  • 后端: Qt4AggTkAgg => Tkinter回調中的異常)

(對於許多額外的點,任何人都可以概述matplotlib的打包器/墊片如何工作,沿着Tcl / Tk書中第17章“打包者”的路線?)

您可以使用plt.subplots_adjust來更改子圖Link之間的間距

subplots_adjust(left=None, bottom=None, right=None, top=None, wspace=None, hspace=None)

left  = 0.125  # the left side of the subplots of the figure
right = 0.9    # the right side of the subplots of the figure
bottom = 0.1   # the bottom of the subplots of the figure
top = 0.9      # the top of the subplots of the figure
wspace = 0.2   # the amount of width reserved for blank space between subplots
hspace = 0.2   # the amount of height reserved for white space between subplots

Jose發布的鏈接已更新,pylab現在有一個tight_layout()函數,可自動執行此操作(在matplotlib版本1.1.0中)。

http://matplotlib.org/api/pyplot_api.html#matplotlib.pyplot.tight_layout

http://matplotlib.org/users/tight_layout_guide.html#plotting-guide-tight-layout

我發現這很棘手,但在MatPlotLib常見問題解答中有一些信息。 它相當麻煩,需要了解單個元素(ticklabels)占用的空間......

更新:該頁面指出tight_layout()函數是最簡單的方法,它試圖自動糾正間距。

否則,它會顯示獲取各種元素(例如標簽)大小的方法,以便您可以更正軸元素的間距/位置。 以下是上述FAQ頁面中的示例,該頁面確定了非常寬的y軸標簽的寬度,並相應地調整軸寬度:

import matplotlib.pyplot as plt
import matplotlib.transforms as mtransforms
fig = plt.figure()
ax = fig.add_subplot(111)
ax.plot(range(10))
ax.set_yticks((2,5,7))
labels = ax.set_yticklabels(('really, really, really', 'long', 'labels'))

def on_draw(event):
   bboxes = []
   for label in labels:
       bbox = label.get_window_extent()
       # the figure transform goes from relative coords->pixels and we
       # want the inverse of that
       bboxi = bbox.inverse_transformed(fig.transFigure)
       bboxes.append(bboxi)

   # this is the bbox that bounds all the bboxes, again in relative
   # figure coords
   bbox = mtransforms.Bbox.union(bboxes)
   if fig.subplotpars.left < bbox.width:
       # we need to move it over
       fig.subplots_adjust(left=1.1*bbox.width) # pad a little
       fig.canvas.draw()
   return False

fig.canvas.mpl_connect('draw_event', on_draw)

plt.show()

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