Matplotlib.pyplot scatter:将ylim min设置为零不起作用

时间:2018-05-14 02:41:49

标签: python matplotlib

我使用以下代码提取了一些表数据:

import pandas as pd  
import matplotlib.pyplot as plt  

stat_dict={'Disposals' : 0,
           'Kicks' : 1,
           'Marks' : 2,
           'Handballs' : 3,
           'Goals' : 4,
           'Behinds' : 5,
           'Hitouts' : 6,
           'Tackles' : 7,
           'Rebounds' : 8,
           'Inside50s' : 9,
           'Clearances': 9,
           'Clangers' : 10,
           'FreesFor' : 11,
           'FreesAgainst' : 12,
           'ContestedPosessions' : 13,
           'UncontestedPosesseions' : 14,
           'ContestedMarks' : 15,
           'MarksInside50' : 16,
           'OnePercenters' : 17,
           'Bounces' : 18,
           'GoalAssists' : 19,
           'Timeplayed' : 20}

team_lower_case='fremantle'
player="Fyfe, Nat"
stat_required='Disposals'
rounds=7

tables = pd.read_html("https://afltables.com/afl/stats/teams/" 
+str(team_lower_case)+"/2018_gbg.html")

for df in tables:
    df.drop(df.columns[rounds+1:], axis=1, inplace=True)   # remove 
unwanted columns
    df.columns = df.columns.droplevel(0)    # remove extra index level

stat_table=tables[stat_dict[stat_required]]

player_stat=stat_table[stat_table["Player"]==player]
player_stat=player_stat.iloc[:,1:8]

哪个输出:

     R1    R2    R3    R4    R5    R6    R7
8  22.0  29.0  38.0  25.0  43.0  27.0  33.0

然后我绘制了这些数据:

plt.scatter(range(1,rounds+1),player_stat)
plt.show()

enter image description here 我想将y轴限制设置为零:

plt.ylim(0,50)

但是这导致情节被压扁和怪异: enter image description here

我也尝试了以下内容:

plt.ylim(ymin=0)

enter image description here

1 个答案:

答案 0 :(得分:2)

您的数据是字符串。可以使用以下方法重现该问题:

y = ["22.0", "29.0", "38.0", "25.0", "43.0", "27.0", "33.0"]
plt.scatter(range(len(y)),y)
plt.ylim(0,50)

enter image description here

您需要将player_stat转换为数字数据类型。一种可能的方法是使用.astype(float)。对于你的例子,它将是:

plt.scatter(range(1,rounds+1), player_stat.astype(float))