Matplotlib是Python中的一個庫,它是數字的-NumPy庫的數學擴展。軸類包含大多數圖形元素:Axis,Tick,Line2D,Text,Polygon等,並設置坐標係。 Axes實例通過callbacks屬性支持回調。
matplotlib.axes.Axes.contains_point()函數
matplotlib庫的axiss模塊中的Axes.contains_point()函數用於返回點(像素坐標對)是否在軸補丁中。
用法: Axes.contains_point(self, point)
參數:此方法僅接受一個參數。
- point:此參數是一對像素坐標。
返回值:此方法返回布爾值。
以下示例說明了matplotlib.axes中的matplotlib.axes.Axes.contains_point()函數:
範例1:
# Implementation of matplotlib function
import numpy as np
import matplotlib.cm as cm
import matplotlib.pyplot as plt
import matplotlib.cbook as cbook
from matplotlib.path import Path
from matplotlib.patches import PathPatch
delta = 0.025
x = y = np.arange(-3.0, 3.0, delta)
X, Y = np.meshgrid(x, y)
Z1 = np.exp(-X**2 - Y**2)
Z2 = np.exp(-(X - 1)**2 - (Y - 1)**2)
Z = (Z1 - Z2) * 2
path = Path([[0, 1], [1, 0], [0, -1],
[-1, 0], [0, 1]])
patch = PathPatch(path, facecolor ='none')
fig, ax = plt.subplots()
ax.add_patch(patch)
im = ax.imshow(Z,
interpolation ='bilinear',
cmap = cm.gray,
origin ='lower',
extent =[-3, 3, -3, 3],
clip_path = patch,
clip_on = True)
im.set_clip_path(patch)
ax.text(-1.2, 2,
"Value Return:"+ str(path.contains_point([0, 0])),
fontweight ="bold",
fontsize = 10)
fig.suptitle('matplotlib.axes.Axes.contains_point() \
function Example', fontweight ="bold")
plt.show()
輸出:
範例2:
# Implementation of matplotlib function
import matplotlib.pyplot as plt
from matplotlib.path import Path
import matplotlib.patches as patches
verts = [(0., 0.), (0., 1.),
(1., 1.), (1., 0.),
(0., 0.)]
codes = [Path.MOVETO, Path.LINETO,
Path.LINETO, Path.LINETO, Path.CLOSEPOLY]
path = Path(verts, codes)
fig, ax = plt.subplots()
patch = patches.PathPatch(path, facecolor ='green', lw = 2)
ax.add_patch(patch)
ax.set_xlim(-0.5, 2)
ax.set_ylim(-0.5, 2)
ax.text(0, 1.2,
"Value Return:"+ str(path.contains_point([5, 5])),
fontweight ="bold",
fontsize = 10)
fig.suptitle('matplotlib.axes.Axes.contains_point()\
function Example', fontweight ="bold")
plt.show()
輸出:
相關用法
注:本文由純淨天空篩選整理自SHUBHAMSINGH10大神的英文原創作品 Matplotlib.axes.Axes.contains_point() in Python。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。