使用 python matplotlib 创建甘特图 [英] Create Gantt Plot with python matplotlib
问题描述
如何使用 matplotlib 绘制具有该数据的图形.问题在于可视化从第2列到第3列的距离.最后,它看起来应该像甘特图.
How is it possible with matplotlib to plot a graph with that data. The problem is to visualize the distance from column 2 to column 3. At the end it should look like a Gantt chart.
0 0 0.016 19.833
1 0 19.834 52.805
2 0 52.806 84.005
5 0 84.012 107.305
8 0 107.315 128.998
10 0 129.005 138.956
11 0 138.961 145.587
13 0 145.594 163.863
15 0 163.872 192.118
16 0 192.127 193.787
17 0 193.796 197.106
20 0 236.099 246.223
25 1 31.096 56.180
27 1 58.097 64.857
28 1 64.858 66.494
29 1 66.496 89.908
31 1 89.918 111.606
34 1 129.007 137.371
35 1 137.372 145.727
39 1 176.097 209.461
42 1 209.476 226.207
44 1 226.217 259.317
46 1 259.329 282.488
47 1 282.493 298.905
第1列需要2种颜色.对于y轴,选择了0列,对于x轴,选择了第2列和第3列很重要.对于每一行,应绘制一条线.第二列是开始时间,第三列是停止时间.
I need 2 colors for column 1. And for the y-axis the column 0 is selected, for the x-axis the column 2 and 3 are important. For each row a line should be plotted. Column 2 is the start time, and column 3 is the stop time.
推荐答案
如果我没理解错的话,您想在第 3 列和第 4 列的 x 值之间绘制一条水平线,y 值等于列0.要在两个x值之间的给定y值处绘制水平线,可以使用 hlines
.我相信下面的代码是一个可能的解决方案.
If I have understood you correctly, you want to plot a horizontal line between the x-values of the 3rd and 4th column, with y-value equal that in column 0. To plot a horizontal line at a given y-value between two x-values, you could use hlines
. I believe the code below is a possible solution.
import numpy as np
import matplotlib.pyplot as plt
# Read data from file into variables
y, c, x1, x2 = np.loadtxt('data.txt', unpack=True)
# Map value to color
color_mapper = np.vectorize(lambda x: {0: 'red', 1: 'blue'}.get(x))
# Plot a line for every line of data in your file
plt.hlines(y, x1, x2, colors=color_mapper(c))
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