Matplotlib是Python中的一个库,它是数字的-NumPy库的数学扩展。轴类包含大多数图形元素:Axis,Tick,Line2D,Text,Polygon等,并设置坐标系。 Axes实例通过callbacks属性支持回调。
matplotlib.axes.Axes.contains_point()函数
matplotlib库的axiss模块中的Axes.contains_point()函数用于返回点(像素坐标对)是否在轴补丁中。
用法: Axes.contains_point(self, point)
参数:此方法仅接受一个参数。
- point:此参数是一对像素坐标。
返回值:此方法返回布尔值。
以下示例说明了matplotlib.axes中的matplotlib.axes.Axes.contains_point()函数:
范例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()
输出:
范例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()
输出:
相关用法
注:本文由纯净天空筛选整理自SHUBHAMSINGH10大神的英文原创作品 Matplotlib.axes.Axes.contains_point() in Python。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。