基本圖形
柱狀圖
reviews['points'].value_counts().sort_index().plot.bar()
散點(diǎn)圖
reviews[reviews['price'] < 100].sample(100).plot.scatter(x='price', y='points')
image.png
蜂窩圖
reviews[reviews['price'] < 100].plot.hexbin(x='price', y='points', gridsize=15)
image.png
大量重復(fù)的點(diǎn)可以用這種圖表示
柱狀圖-疊加模式
image.png
wine_counts.plot.bar(stacked=True)
image.png
面積模式
wine_counts.plot.area()
折線模式
wine_counts.plot.line()
美化
設(shè)置圖的大小，字體大小，顏色，標(biāo)題
reviews['points'].value_counts().sort_index().plot.bar(
figsize=(12, 6),
color='mediumvioletred',
fontsize=16,
title='Rankings Given by Wine Magazine',
)
借助Matplotlib
import matplotlib.pyplot as plt
ax = reviews['points'].value_counts().sort_index().plot.bar(
figsize=(12, 6),
color='mediumvioletred',
fontsize=16
)
ax.set_title("Rankings Given by Wine Magazine", fontsize=20)
image.png
借助Seaborn-去除邊框
import matplotlib.pyplot as plt
import seaborn as sns
ax = reviews['points'].value_counts().sort_index().plot.bar(
figsize=(12, 6),
color='mediumvioletred',
fontsize=16
)
ax.set_title("Rankings Given by Wine Magazine", fontsize=20)
sns.despine(bottom=True, left=True)
image.png
多圖表
matplotlib
fig, axarr = plt.subplots(2, 2, figsize=(12, 8))
reviews['points'].value_counts().sort_index().plot.bar(
ax=axarr[0][0]
)
reviews['province'].value_counts().head(20).plot.bar(
ax=axarr[1][1]
image.png
Seaborn
df = footballers[footballers['Position'].isin(['ST', 'GK'])]
g = sns.FacetGrid(df, col="Position", col_wrap=2)
g.map(sns.kdeplot, "Overall")
image.png
df = footballers[footballers['Position'].isin(['ST', 'GK'])]
df = df[df['Club'].isin(['Real Madrid CF', 'FC Barcelona', 'Atlético Madrid'])]
g = sns.FacetGrid(df, row="Position", col="Club")
g.map(sns.violinplot, "Overall")
image.png
df = footballers[footballers['Position'].isin(['ST', 'GK'])]
df = df[df['Club'].isin(['Real Madrid CF', 'FC Barcelona', 'Atlético Madrid'])]
g = sns.FacetGrid(df, row="Position", col="Club",
row_order=['GK', 'ST'],
col_order=['Atlético Madrid', 'FC Barcelona', 'Real Madrid CF'])
g.map(sns.violinplot, "Overall")
控制顯示順序
pairplot-多變量的相互關(guān)系
sns.pairplot(footballers[['Overall', 'Potential', 'Value']])
image.png
顏色，圖標(biāo)參數(shù)
sns.lmplot(
x='Value', y='Overall',
markers=['o', 'x', '*'],
hue='Position',
data=footballers.loc[footballers['Position'].isin(
['ST', 'RW', 'LW'])],
fit_reg=False
)
image.png
分組
f = (footballers
.loc[footballers['Position'].isin(['ST', 'GK'])]
.loc[:, ['Value', 'Overall', 'Aggression', 'Position']]
)
f = f[f["Overall"] >= 80]
f = f[f["Overall"] < 85]
f['Aggression'] = f['Aggression'].astype(float)
sns.boxplot(x="Overall", y="Aggression", hue='Position', data=f)
image.png
總結(jié)圖
熱力圖
f = (
footballers.loc[:, ['Acceleration', 'Aggression', 'Agility', 'Balance', 'Ball control']]
.applymap(lambda v: int(v) if str.isdecimal(v) else np.nan)
.dropna()
).corr()
sns.heatmap(f, annot=True)
image.png
平行線圖
from pandas.plotting import parallel_coordinates
f = (
footballers.iloc[:, 12:17]
.loc[footballers['Position'].isin(['ST', 'GK'])]
.applymap(lambda v: int(v) if str.isdecimal(v) else np.nan)
.dropna()
)
f['Position'] = footballers['Position']
f = f.sample(200)
parallel_coordinates(f, 'Position'）
image.png
Seanborn使用
基本圖形
柱狀圖-值統(tǒng)計(jì)
countplot == value_count
sns.countplot(reviews['points'])
image.png
折線圖-密度圖
sns.kdeplot(reviews.query('price < 200').price)
image.png
二維密度圖--類似蜂窩圖作用
樣本多，重復(fù)點(diǎn)多的時(shí)候用
sns.kdeplot(reviews[reviews['price'] < 200].loc[:, ['price', 'points']].dropna().sample(5000))
image.png
直方圖
類似pandas.hist
sns.distplot(reviews['points'], bins=10, kde=False)
image.png
散點(diǎn)圖和直方圖復(fù)合
sns.jointplot(x='price', y='points', data=reviews[reviews['price'] < 100])
image.png
蜂窩圖和直方圖復(fù)合
sns.jointplot(x='price', y='points', data=reviews[reviews['price'] < 100], kind='hex',gridsize=20)
image.png
箱線圖
df = reviews[reviews.variety.isin(reviews.variety.value_counts().head(5).index)]
sns.boxplot(
x='variety',
y='points',
data=df
)
image.png
小提琴圖
sns.violinplot(
x='variety',
y='points',
data=reviews[reviews.variety.isin(reviews.variety.value_counts()[:5].index)]
)
image.png
網(wǎng)絡(luò)動(dòng)態(tài)圖表-plotly
from plotly.offline import init_notebook_mode, iplot
init_notebook_mode(connected=True)
散點(diǎn)圖
import plotly.graph_objs as go
iplot([go.Scatter(x=reviews.head(1000)['points'], y=reviews.head(1000)['price'], mode='markers')])
image.png
熱力圖
iplot([go.Histogram2dContour(x=reviews.head(500)['points'],
y=reviews.head(500)['price'],
contours=go.Contours(coloring='heatmap')),
go.Scatter(x=reviews.head(1000)['points'], y=reviews.head(1000)['price'], mode='markers')])
image.png
圖形語法的可視化庫plotnine
from plotnine import *
top_wines = reviews[reviews['variety'].isin(reviews['variety'].value_counts().head(5).index)]
df = top_wines.head(1000).dropna()
(ggplot(df)
+ aes('points', 'price')
+ geom_point())
#其他表達(dá)形式ggplot(df)
+ geom_point(aes('points', 'price'))
)
(ggplot(df, aes('points', 'price'))
+ geom_point
一層層添加圖形參數(shù)
image.png
df = top_wines.head(1000).dropna()
(
ggplot(df)
+ aes('points', 'price')
+ geom_point()
+ stat_smooth()
)
image.png
添加顏色
df = top_wines.head(1000).dropna()
(
ggplot(df)
+ geom_point()
+ aes(color='points')
+ aes('points', 'price')
+ stat_smooth()
)
一圖多表
df = top_wines.head(1000).dropna()
(ggplot(df)
+ aes('points', 'price')
+ aes(color='points')
+ geom_point()
+ stat_smooth()
+ facet_wrap('~variety')
)
image.png
柱狀圖
(ggplot(top_wines)
+ aes('points')
+ geom_bar()
)
image.png
二維熱力圖
(ggplot(top_wines)
+ aes('points', 'variety')
+ geom_bin2d(bins=20)
)
image.png
更多API文檔 API Reference.
處理時(shí)間序列
一般柱狀圖
shelter_outcomes['date_of_birth'].value_counts().sort_values().plot.line()
image.png
按年份重新取樣
shelter_outcomes['date_of_birth'].value_counts().resample('Y').sum().plot.line()
image.png
stocks['volume'].resample('Y').mean().plot.bar()
image.png
同期對比
如今年12月和去年12月比較
from pandas.plotting import lag_plot
lag_plot(stocks['volume'].tail(250))
image.png
自相關(guān)圖
from pandas.plotting import autocorrelation_plot
autocorrelation_plot(stocks['volume'])
image.png
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數(shù)據(jù)結(jié)構(gòu)和算法基礎(chǔ)Python語言實(shí)現(xiàn)
