Python中的 Matplotlib.figure.Figure.set_dpi()
Matplotlib是Python中的一个库,它是 NumPy 库的数值数学扩展。 figure 模块提供了顶级 Artist,即 Figure,其中包含所有绘图元素。该模块用于控制所有绘图元素的子图和顶级容器的默认间距。
matplotlib.figure.Figure.set_dpi() 方法
matplotlib 库的set_dpi() 方法图形模块用于设置图形的分辨率,以每英寸点数为单位。
Syntax: set_dpi(self, val)
Parameters: This method accept the following parameters that are discussed below:
- val : This parameter is the float value.
Returns: This method does not returns any value.
下面的示例说明了 matplotlib.figure 中的 matplotlib.figure.Figure.set_dpi()函数:
示例 1:
# Implementation of matplotlib function
import matplotlib.pyplot as plt
from matplotlib.figure import Figure
import numpy as np
fig = plt.figure(figsize =(5, 4))
ax = fig.add_axes([0.1, 0.1, 0.8, 0.8])
xx = np.arange(0, 2 * np.pi, 0.01)
ax.plot(xx, np.sin(xx))
fig.set_dpi(150.0)
fig.suptitle("""matplotlib.figure.Figure.set_dpi()
function Example\n\n""", fontweight ="bold")
plt.show()
输出:
示例 2:
# Implementation of matplotlib function
import matplotlib.pyplot as plt
from matplotlib.figure import Figure
from mpl_toolkits.axisartist.axislines import Subplot
import numpy as np
fig = plt.figure(facecolor ="lightgreen")
ax = Subplot(fig, 111)
fig.add_subplot(ax)
ax.axis["left"].set_visible(False)
ax.axis["top"].set_visible(False)
fig.set_dpi(90.0)
fig.suptitle("""matplotlib.figure.Figure.set_dpi()
function Example\n\n""", fontweight ="bold")
plt.show()
输出: