Function plotNode

Decision Tree/Decision Tree.py:254–259

(nodeTxt, centerPt, parentPt, nodeType)

	2017-07-24
"""
def plotNode(nodeTxt, centerPt, parentPt, nodeType):
	arrow_args = dict(arrowstyle="<-")											#定义箭头格式
	font = FontProperties(fname=r"c:\windows\fonts\simsunb.ttf", size=14)		#设置中文字体
	createPlot.ax1.annotate(nodeTxt, xy=parentPt,  xycoords='axes fraction',	#绘制结点
		xytext=centerPt, textcoords='axes fraction',
		va="center", ha="center", bbox=nodeType, arrowprops=arrow_args, FontProperties=font)

"""
函数说明:标注有向边属性值