如何使用python中的matplotlib.plyplot给id指向id并绘制点到点的点

Question

我使用python绘制数据。如何为plot中的每个点提供ID，然后从A=(1,2)到B=(2,3)绘制线

Lat=[1,2,3,4]
Long=[2,3,1,3]
id_point=[A,B,C,D]
plt.plot( Lat,Long , 'o', markerfacecolor=col, markeredgecolor='k', markersize=4)

Answer 1

您可以通过以下方式执行此操作

def plotLine(p1, p2):
    plt.plot( [p1[0], p2[0]], [p1[1], p2[1]] )

Lat = [1,2,3,4]
Long = [2,3,1,3]
id_point=['A','B','C','D']

# Fill a dictionary with the points
points = {} # Create empty dictionary
for idx, point in enumerate(zip(Lat,Long)):
    points[id_point[idx]] = point 

# Plot points and their names
plt.plot(Lat, Long,'o') #Plot the points as you did
for key in points:
    plt.annotate(key, xy=points[key]) #Print name of point

plotLine(points['A'], points['B']) #Connect point A and B
plt.show()

points是一个包含以下内容的字典：

{'A': (1, 2), 'C': (3, 1), 'D': (4, 3), 'B': (2, 3)}

键是点的名称，每个值都是带坐标的元组。