При построении графика точки выстраиваются в прямую линию, хотя должны быть распределены по всей площади графика

import numpy as np
import matplotlib.pyplot as plt 
 
with open("x_val.txt") as file:
    Xpoints = [row.strip() for row in file]
with open("y_val.txt") as file:
    Ypoints = [row.strip() for row in file]
 
plt.scatter(Xpoints, Ypoints)
plt.xlabel('X')
plt.ylabel('Y')
plt.show()

import numpy as np
import matplotlib.pyplot as plt
 
x_val = '''
0.861892
0.403283
0.702176
0.821749
0.851551
0.932008
0.134228
0.224917
0.301962
0.307949'''
 
y_val = '''
0.640337
0.435341
0.928953
0.674899
0.795819
0.311677
0.251806
0.709758
0.0887764
0.974012'''
 
# with open("x_val.txt") as file:
#     Xpoints = [row.strip() for row in file]
# with open("y_val.txt") as file:
#     Ypoints = [row.strip() for row in file]
Xpoints = [float(i) for i in x_val.split()] 
Ypoints = [float(i) for i in y_val.split()] 
plt.scatter(Xpoints, Ypoints)
plt.xlabel('X')
plt.ylabel('Y')
plt.show()

import numpy as np
import matplotlib.pyplot as plt
 
with open("x_val.txt") as file:
    x_val = [row.strip() for row in file]
with open("y_val.txt") as file:
    y_val = [row.strip() for row in file]
    
Xpoints = [float(i) for i in x_val.split()] 
Ypoints = [float(i) for i in y_val.split()] 
plt.scatter(Xpoints, Ypoints)
plt.xlabel('X')
plt.ylabel('Y')
plt.show()