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ax=plt.gca() #gca:get current axis得到当前轴
#设置图片的右边框和上边框为不显示
ax.spines['right'].set_color('none')
ax.spines['top'].set_color('none')
plt.figure(figsize=(10, 5), dpi=400)
https://blog.csdn.net/qwe2508/article/details/88078746
plt.figure()
for i in range(1,32):
plt.subplot(4,8,i)
plt.imshow(img_test[i-1])
plt.show()
参考https://blog.csdn.net/TeFuirnever/article/details/88947248
plt.text(x,
y,
string,
fontsize=15,
verticalalignment="top",
horizontalalignment="right"
)
参数:
fig, axes = plt.subplots(nrows=2, ncols=2,figsize=(11, 7),dpi=400)
# 选择画布
ax = axes[1][1]
或者
plt.subplot(122)
plt.legend()
在画图的时候每个图加一个label
就可以line1, = plt.plot(xxx, label='女生购物欲望')
line2, = plt.plot(xxx, label='男生购物欲望')
# 或者这样进行修改
plt.legend(handles=[line1, line2], labels=['girl购物欲望','boy购物欲望'], loc='best',title="图例标题")
如果没有line的话,通过这种方式获得,参考https://www.cnblogs.com/MTandHJ/p/10850415.html
handles, labels = ax.get_legend_handles_labels()
ax.legend(handles, labels)
可选loc参数
best
upper right
upper left
lower left
lower right
right
center left
center right
lower center
upper center
center
ax.get_figure().savefig('name',dpi=400)
# 或者
plt.savefig('name',dpi=400)
设置背景透明
参考https://blog.csdn.net/hfut_jf/article/details/52648033
# 设置图例透明
legend = ax.legend()
frame = legend.get_frame()
frame.set_alpha(1)
frame.set_facecolor('none') # 设置图例legend背景透明
# 给每个数据矩形标注数值
plt.savefig('{路径}', format='png', bbox_inches='tight', transparent=True, dpi=600) # bbox_inches='tight' 图片边界空白紧致, 背景透明
检查字体
import matplotlib as mpl
mpl.font_manager.fontManager.ttflist
根据字体的名字修改设置
import matplotlib.pyplot as plt
# 支持中文
plt.rcParams['font.sans-serif'] = ['SimHei'] # 用来正常显示中文,这个字体和上述的ttflist中出现的名字一致
plt.rcParams['axes.unicode_minus'] = False # 用来正常显示负号
参考官方文档https://matplotlib.org/2.0.2/examples/pylab_examples/colorbar_tick_labelling_demo.html
import matplotlib.pyplot as plt # 随机设置 10*10 的矩阵 x = np.random.random([10, 10]) # 初始化出图设置 fig = plt.figure() ax = fig.gca() im = ax.imshow(x) # 这里设定在colorbar上的位置,一个是horizontal(底部横着),另一个是vertical(右侧竖着) quater = (x.max()+x.min())/4 cbar =fig.colorbar(im, ticks=[x.min(), quater ,quater*2, quater*3, x.max()], orientation='horizontal', fraction=0.04, pad = 0.01,# fraction表示这个条的长度比例, pad表示这个条和图的距离 ) # cbar =fig.colorbar(im, ticks=[x.min(), (x.max()+x.min())/2, x.max()], orientation='vertical') # 和上面的位置一一对应的字符串 cbar.ax.set_xticklabels(['Low', '123','Medium', '哈哈哈','High']) # horizontal colorbar # cbar.ax.set_yticklabels(['Low', 'Medium', 'High']) # vertical colorbar plt.show()
详见https://blog.csdn.net/sinat_32570141/article/details/105226330
sns.color_palette("Blues", 10)
参考https://blog.csdn.net/qq_23044461/article/details/117703854
import matplotlib as mpl
color_normal = mpl.colors.LinearSegmentedColormap.from_list('自定义的颜色名字',
[(0, '#F0DD72'),
(0.5, '#FFD1A8'),
(1, '#F0A090'),], N=3) # N用来定义颜色被拆分成多少份
red_color_normal
参考https://blog.csdn.net/weixin_46649052/article/details/115321326
import matplotlib.pyplot as plt
labels = 'Frogs', 'Hogs', 'Dogs', 'Logs' # 定义标签
sizes = [15, 30, 45, 10] # 每一块的比例
colors = ['yellowgreen', 'gold', 'lightskyblue', 'lightcoral'] # 每一块的颜色
explode = (0, 0.1, 0, 0) # 突出显示,这里仅仅突出显示第二块(即'Hogs')
plt.pie(sizes, explode=explode, labels=labels, colors=colors, autopct='%1.1f%%', shadow=True, startangle=90)
plt.axis('equal') # 显示为圆(避免比例压缩为椭圆)
plt.show()
参考https://zhuanlan.zhihu.com/p/110656183
import matplotlib.pyplot as plt
n = [0, 1, 2, 3, 4]
m = [2, 3, -1, 1, -2]
plt.plot(n, m,
color = 'k',
linestyle = '-.',
linewidth = 3,
marker = 'p',
markersize = 15,
markeredgecolor = 'b',
markerfacecolor = 'r')
plt.show()
参考https://zhuanlan.zhihu.com/p/25128216
import numpy as np import matplotlib.pyplot as plt size = 5 x = np.arange(size) a = np.random.random(size) b = np.random.random(size) c = np.random.random(size) total_width, n = 0.8, 3 width = total_width / n x = x - (total_width - width) / 2 plt.bar(x, a, width=width, label='a') plt.bar(x + width, b, width=width, label='b') plt.bar(x + 2 * width, c, width=width, label='c') plt.legend() plt.show()
横过来的柱状图
import numpy as np
import matplotlib.pyplot as plt
a = np.array([5, 20, 15, 25, 10])
b = np.array([10, 15, 20, 15, 5])
plt.barh(range(len(a)), a)
plt.barh(range(len(b)), -b)
plt.show()
极坐标柱状图
import numpy as np import matplotlib.pyplot as plt N = 8 # 分成8份 theta = np.linspace(0.0, 2 * np.pi, N, endpoint=False) radii = np.random.randint(3,15,size = N) width = np.pi / 4 colors = np.random.rand(8,3) # 随机⽣成颜⾊ ax = plt.subplot(111, projection='polar') # polar表示极坐标 ax.bar( x=theta, # 柱子的位置 height=radii, # 柱子的高度 width=width, # 柱子的宽度 bottom=bottom, # 开始画的位置 linewidth=2, # 线段宽度 edgecolor='white',# 用白色分开 color=colors # 每个柱子的颜色 )
参考https://blog.csdn.net/weixin_45880844/article/details/121649879
#导入模块
import matplotlib
import pandas as pd
#准备数据
df = pd.DataFrame({
'han': [30, 20, 20, 10, 20, 10],
'shu': [7, 9, 6, 8, 1, 7],
'huan': [11, 12, 18, 16, 17, 15],
}, index=pd.date_range(start='2021/12/01', end='2022/06/01', freq='M'))
colorDic = dict(han='DarkGreen', shu='DarkOrange', huan='DarkBlue')
ax = df.plot.area(stacked=False,color=colorDic,figsize=(20,10))
matplotlib.pyplot.show()
参考https://www.cnblogs.com/Big-Big-Watermelon/p/14052165.html
普通marker
数学符号marker
可以显示的形状 marker名称 ϖ \varpi ϱ \varrho ς \varsigma ϑ \vartheta ξ \xi ζ \zeta Δ \Delta Γ \Gamma Λ \Lambda Ω \Omega Φ \Phi Π \Pi Ψ \Psi Σ \Sigma Θ \Theta Υ \Upsilon Ξ \Xi ℧ \mho ∇ \nabla ℵ \aleph ℶ \beth ℸ \daleth ℷ \gimel / / [ [ ⇓ \Downarrow ⇑ \Uparrow ‖ \Vert ↓ \downarrow ⟨ \langle ⌈ \lceil ⌊ \lfloor ⌞ \llcorner ⌟ \lrcorner ⟩ \rangle ⌉ \rceil ⌋ \rfloor ⌜ \ulcorner ↑ \uparrow ⌝ \urcorner \vert { \{ \| } \} ] ] | ⋂ \bigcap ⋃ \bigcup ⨀ \bigodot ⨁ \bigoplus ⨂ \bigotimes ⨄ \biguplus ⋁ \bigvee ⋀ \bigwedge ∐ \coprod ∫ \int ∮ \oint ∏ \prod ∑ \sum
自定义marker
import matplotlib.pyplot as plt plt.rcParams['font.sans-serif']=['SimHei'] # 用于显示中文 plt.rcParams['axes.unicode_minus'] = False # 用于显示中文 plt.figure(dpi=200) #常规marker使用 plt.plot([1,2,3],[1,2,3],marker=4, markersize=15, color='lightblue',label='常规marker') plt.plot([1.8,2.8,3.8],[1,2,3],marker='2', markersize=15, color='#ec2d7a',label='常规marker') #非常规marker使用 #注意使用两个$符号包围名称 plt.plot([1,2,3],[4,5,6],marker='$\circledR$', markersize=15, color='r', alpha = 0.5 ,label='非常规marker') plt.plot([1.5,2.5,3.5],[1.25,2.1,6.5],marker='$\heartsuit$', markersize=15, color='#f19790', alpha=0.5,label='非常规marker') plt.plot([1,2,3],[2.5,6.2,8],marker='$\clubsuit$', markersize=15, color='g', alpha=0.5,label='非常规marker') #自定义marker plt.plot([1.2,2.2,3.2],[1,2,3],marker='$666$', markersize=15, color='#2d0c13',label='自定义marker') plt.legend(loc='upper left') for i in ['top','right']: plt.gca().spines[i].set_visible(False)
字符型linestyle
linestyle_str = [
('solid', 'solid'), # Same as (0, ()) or '-';solid’, (0, ()) , '-'三种都代表实线。
('dotted', 'dotted'), # Same as (0, (1, 1)) or '.'
('dashed', 'dashed'), # Same as '--'
('dashdot', 'dashdot')] # Same as '-.'
元组型linestyle
可以通过修改元组中的数字来呈现出不同的线型,因此可以构造出无数种线型。
linestyle_tuple = [
('loosely dotted', (0, (1, 10))),
('dotted', (0, (1, 1))),
('densely dotted', (0, (1, 2))), ('loosely dashed', (0, (5, 10))),
('dashed', (0, (5, 5))),
('densely dashed', (0, (5, 1))), ('loosely dashdotted', (0, (3, 10, 1, 10))),
('dashdotted', (0, (3, 5, 1, 5))),
('densely dashdotted', (0, (3, 1, 1, 1))), ('dashdotdotted', (0, (3, 5, 1, 5, 1, 5))),
('loosely dashdotdotted', (0, (3, 10, 1, 10, 1, 10))),
('densely dashdotdotted', (0, (3, 1, 1, 1, 1, 1)))]
线型使用代码:
import matplotlib.pyplot as plt plt.figure(dpi=120) #字符型linestyle使用方法 plt.plot([1,2,3],[1,2,13],linestyle='dotted', color='#1661ab', linewidth=5, label='字符型线型:dotted') #元组型lintstyle使用方法 plt.plot([0.8,0.9,1.5],[0.8,0.9,21.5],linestyle=(0,(3, 1, 1, 1, 1, 1)), color='#ec2d7a', linewidth=5, label='元组型线型:(0,(3, 1, 1, 1, 1, 1)') for i in ['top','right']: plt.gca().spines[i].set_visible(False) #自定义inestyle plt.plot([1.5,2.5,3.5],[1,2,13],linestyle=(0,(1,2,3,4,2,2)), color='black', linewidth=5, label='自定义线型:(0,(1,2,3,4,2,2)))') plt.plot([2.5,3.5,4.5],[1,2,13],linestyle=(2,(1,2,3,4,2,2)), color='g', linewidth=5, label='自定义线型:(1,(1,2,3,4,2,2)))') plt.legend()
不得不说这哥们写的真好
图片都是我从人家博客复制来的,csdn这个beyond自己打了水印
装了seaborn扩展的话,在字典seaborn.xkcd_rgb中包含所有的xkcd crowdsourced color names。
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