我是pyplot的新手,想知道我在这里做错了什么。
我想绘制一系列随机线段:
以下是一些示例代码:
import matplotlib.pyplot as plt
def testPlot():
minx = miny = -1
maxx = maxy = 30
# some points randomly generated
points = [((10, 21), (19, 22)), ((11, 9), (22, 27)), ((9, 13), (5, 9)), ((18, 4), (2, 21)), ((25, 27
for pair in points:
print pair
for point in pair: #plot each point with a small dot
x = point[0]
y = point[1]
plt.plot(x,y,'bo')
# draw a line between the pairs of points
plt.plot(pair[0][0],pair[0][1],pair[1][0],pair[1][1],color='r',linewidth=2)
plt.axis([minx,maxx,miny,maxy])
plt.show()
这是我跑完之后得到的,点之间应该有线但是哪里有线?
((10, 21), (19, 22))
((11, 9), (22, 27))
((9, 13), (5, 9))
((18, 4), (2, 21))
((25, 27), (11, 13))
感谢您提供任何线索
答案 0 :(得分:2)
这就是问题所在:
...
plt.plot(pair[0][0],pair[0][1],pair[1][0],pair[1][1],color='r',linewidth=2)
...
您试图引用x,y,x1,y1
,实际上应该是((x, x1), (y, y1))
。纠正这个似乎工作正常:
def testPlot():
minx = miny = -1
maxx = maxy = 30
# some points randomly generated
points = [((10, 21), (19, 22)), ((11, 9), (22, 27)), ((9, 13), (5, 9)), ((18, 4), (2, 21)), ((25, 27), (11, 13))]
for pair in points:
print pair
for point in pair: #plot each point with a small dot
x = point[0]
y = point[1]
plt.plot(x,y,'bo')
# change this line to ((x, x1), (y, y1))
plt.plot((pair[0][0],pair[1][0]),(pair[0][1],pair[1][1]), color='r',linewidth=2)
plt.axis([minx,maxx,miny,maxy])
plt.show()
结果: