英文:
Matplotlib how to draw vertical line between two Y points
问题
我可以使用以下代码连接每个y点对来生成所需的输出：
import matplotlib.pyplot as pltx = [0, 2, 4, 6]y = [(1, 5), (1, 3), (2, 4), (2, 7)]# Extract individual y valuesy1 = [i for (i, j) in y]y2 = [j for (i, j) in y]plt.plot(x, y1, 'rs', markersize=4)plt.plot(x, y2, 'bo', markersize=4)# Connect the y point pairs with thin linesfor i in range(len(x)):plt.plot([x[i], x[i]], [y1[i], y2[i]], 'k-', lw=1)plt.xlim(xmin=-3, xmax=10)plt.ylim(ymin=-1, ymax=10)plt.xlabel('ID')plt.ylabel('Class')plt.show()
这将创建连接每个y点对的细线，生成所需的输出图形。
英文:
I have 2 y points for each x points. I can draw the plot with this code:
import matplotlib.pyplot as pltx = [0, 2, 4, 6]y = [(1, 5), (1, 3), (2, 4), (2, 7)]plt.plot(x, [i for (i,j) in y], 'rs', markersize = 4)plt.plot(x, [j for (i,j) in y], 'bo', markersize = 4)plt.xlim(xmin=-3, xmax=10)plt.ylim(ymin=-1, ymax=10)plt.xlabel('ID')plt.ylabel('Class')plt.show()
This is the output:
How can I draw a thin line connecting each y point pair? Desired output is:
答案1
得分: 9
只需添加
plt.plot((x,x),([i for (i,j) in y], [j for (i,j) in y]),c='black')
英文:
just add
plt.plot((x,x),([i for (i,j) in y], [j for (i,j) in y]),c='black')
答案2
得分: 4
你也可以使用 LineCollection。下面的解决方案改编自 这个 回答。
from matplotlib import collections as matcollx = [0, 2, 4, 6]y = [(1, 5), (1, 3), (2, 4), (2, 7)]lines = []for i, j in zip(x, y):pair = [(i, j[0]), (i, j[1])]lines.append(pair)linecoll = matcoll.LineCollection(lines, colors='k')fig, ax = plt.subplots()ax.plot(x, [i for (i, j) in y], 'rs', markersize=4)ax.plot(x, [j for (i, j) in y], 'bo', markersize=4)ax.add_collection(linecoll)
英文:
Alternatively, you can also use LineCollection. The solution below is adapted from this answer.
from matplotlib import collections as matcollx = [0, 2, 4, 6]y = [(1, 5), (1, 3), (2, 4), (2, 7)]lines = []for i, j in zip(x,y):pair = [(i, j[0]), (i, j[1])]lines.append(pair)linecoll = matcoll.LineCollection(lines, colors='k')fig, ax = plt.subplots()ax.plot(x, [i for (i,j) in y], 'rs', markersize = 4)ax.plot(x, [j for (i,j) in y], 'bo', markersize = 4)ax.add_collection(linecoll)
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