小白学习之路
1.问题描述:
在学习kaggle经典学习项目Titanic,进行数据可视化处理时,对于每个特征进行相关性分析(也就是绘制pearson correlation heatmap )热力相关性矩阵时, plt.show() 图形绘制出来,字体会重叠.导致无法观察
# Visualisations """将数据进行可视化""" print(train.head(3)) # correlation heatmap 相关性热点矩阵 plt.figure(figsize=(14,12)) plt.title('Pearson Correlation of Features',y=1.05,size=15) sns.heatmap(train.astype(float).corr(),linewidths=0.1,vmax=1.0, square=True,linecolor='white',annot=True) plt.show()
导致看不清坐标轴每个特征的含义
2.解决问题:
思路:只要找到plt所含有的命令,将X.Y坐标轴字体进行旋转即可
寻找python xlabel 的文档
Help on function xlabel in module matplotlib.pyplot: xlabel(s, *args, **kwargs) Set the *x* axis label of the current axis. Default override is:: override = { 'fontsize' : 'small', 'verticalalignment' : 'top', 'horizontalalignment' : 'center' } .. seealso:: :func:`~matplotlib.pyplot.text` For information on how override and the optional args work
发现没有关于xlabel进行旋转的参数,
寻找 python xticks 文档
Help on function xticks in module matplotlib.pyplot: xticks(*args, **kwargs) Get or set the *x*-limits of the current tick locations and labels. :: # return locs, labels where locs is an array of tick locations and # labels is an array of tick labels. locs, labels = xticks() # set the locations of the xticks xticks( arange(6) ) # set the locations and labels of the xticks xticks( arange(5), ('Tom', 'Dick', 'Harry', 'Sally', 'Sue') ) The keyword args, if any, are :class:`~matplotlib.text.Text` properties. For example, to rotate long labels:: xticks( arange(12), calendar.month_name[1:13], rotation=17 )
上面黑体下划线,rotate long label
找到参数 rotation
plt.figure(figsize=(14,12)) plt.title('Pearson Correlation of Features',y=1.05,size=15) sns.heatmap(train.astype(float).corr(),linewidths=0.1,vmax=1.0, square=True,linecolor='white',annot=True) plt.xticks(rotation=90) # 将字体进行旋转 plt.yticks(rotation=360) plt.show()
标签旋转,可清晰看到每个特征的含义
问题思考:
就是plt.show() 输出不了中文字体,这个问题还没有解决