Python Forum

Hi! I created a convex hull algorithm in c and it outputs all the points and the convex hull into datapoints.txt and convexhull.txt.
However, when I use the code below matplotlib scrambles all the axis. Meaning that x-axis may be correct but the y one goes 5 20 10.

Is there any way to force matplotlib to simply draw a point on the coordinate that I read from a file?

main.py

import matplotlib.pyplot as plt

f = open("dataset.txt", "r")
data = f.read()
f.close()

data = data.split("\n")
data = data[:len(data)-1]
for datapoint in data:
    splitdata = list(datapoint.split(" "))
    plt.plot(splitdata[0], splitdata[1], "ro")

plt.show()

dataset.txt

10 10
15 5
16 10
16 20
30 10

Note: I remove the last element of data because Atom forces a newline on save...

Thanks!

You made the same stupid mistake as me!
Why might the "numbers" on the y-axis not be in numerical order?...