如果想要画如下的图形

【资料图】

先画一个饼图

"""Created on 2023年4月9日@author: admin"""import numpy as npimport matplotlib.pyplot as pltn = 20X = np.ones(n)X[-1] *= 2plt.pie(X, explode=X*.05, colors = ["%f" % (i/float(n)) for i in range(n)])

继续进行参数设置

fig = plt.gcf()w, h = fig.get_figwidth(), fig.get_figheight()r = h / float(w)plt.xlim(-1.5, 1.5)plt.ylim(-1.5 * r, 1.5 * r)plt.xticks([])plt.yticks([])

画上面的一个框

from matplotlib.patches import FancyBboxPatchax = plt.gca()ax.add_patch(FancyBboxPatch((-0.05, .87),          width=.66, height=.165, clip_on=False,          boxstyle="square,pad=0", zorder=3,          facecolor="white", alpha=1.0,          transform=plt.gca().transAxes))

FancyBboxPatch主要是实现一个框形区域，后面专门讲这个例子

FancyBboxPatch 类似于 Rectangle ，但它在矩形周围画了一个漂亮的方框。矩形框到花式框的转换委托给中定义的样式类 BoxStyle .

添加文字

plt.text(-0.05, 1.02, " Pie Chart: plt.pie(...)\n",          horizontalalignment="left",          verticalalignment="top",          size="xx-large",          transform=plt.gca().transAxes)

plt.text(-0.05, 1.01, "\n\n Make a pie chart of an array ",horizontalalignment="left",verticalalignment="top",size="large",transform=plt.gca().transAxes)

完整的代码如下

"""Created on 2023年4月9日@author: admin"""import numpy as npimport matplotlib.pyplot as pltn = 20X = np.ones(n)X[-1] *= 2plt.pie(X, explode=X*.05, colors = ["%f" % (i/float(n)) for i in range(n)])fig = plt.gcf()w, h = fig.get_figwidth(), fig.get_figheight()r = h / float(w)plt.xlim(-1.5, 1.5)plt.ylim(-1.5 * r, 1.5 * r)plt.xticks([])plt.yticks([])# Add a title and a box around itfrom matplotlib.patches import FancyBboxPatchax = plt.gca()ax.add_patch(FancyBboxPatch((-0.05, .87),      width=.66, height=.165, clip_on=False,      boxstyle="square,pad=0", zorder=3,      facecolor="white", alpha=1.0,      transform=plt.gca().transAxes))#plt.text(-0.05, 1.02, " Pie Chart: plt.pie(...)\n",        horizontalalignment="left",        verticalalignment="top",        size="xx-large",        transform=plt.gca().transAxes)plt.text(-0.05, 1.01, "\n\n Make a pie chart of an array ",        horizontalalignment="left",        verticalalignment="top",        size="large",        transform=plt.gca().transAxes)plt.show()

import numpy as npimport matplotlib.pyplot as pltn = 20X = np.ones(n)X[-1] *= 2plt.pie(X, explode=X*.05, colors = ["%f" % (i/float(n)) for i in range(n)])fig = plt.gcf()w, h = fig.get_figwidth(), fig.get_figheight()r = h / float(w)plt.xlim(-1.5, 1.5)plt.ylim(-1.5 * r, 1.5 * r)plt.xticks([])plt.yticks([])# Add a title and a box around itfrom matplotlib.patches import FancyBboxPatchax = plt.gca()ax.add_patch(FancyBboxPatch((-0.05, .87),                            width=.66, height=.165, clip_on=False,                            boxstyle="square,pad=0", zorder=3,                            facecolor="white", alpha=1.0,                            transform=plt.gca().transAxes))plt.text(-0.05, 1.02, " Pie Chart:           plt.pie(...)\n",        horizontalalignment="left",        verticalalignment="top",        size="xx-large",        transform=plt.gca().transAxes)plt.text(-0.05, 1.01, "\n\n   Make a pie chart of an array ",        horizontalalignment="left",        verticalalignment="top",        size="large",        transform=plt.gca().transAxes)plt.show()

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