[FIXED] generating random numbers between two numbers

Issue

Is it possible to generate random numbers that are almost equally spaced which shouldnot be exactly same as numpy.linspace output

I look into the numpy.random.uniform function but it doesnot give the required results.

Moreover the the summation of the values generated by the function should be same as the summation of the values generated by numpy.linspace function.

code

import random
import numpy as np
random.seed(42)
data=np.random.uniform(2,4,10)
print(data)

Solution

Maybe this trick by combining numpy.linspace and numpy.random.uniform and random choice two indexes and increase one of them and decrease other help you: (You can change size=10, threshold=0.1 for how random numbers are bigger or smaller)

import numpy as np
size = 10
theroshold = 0.1
r = np.linspace(2,4,size) # r.sum()=30
# array([2.        , 2.22222222, 2.44444444, 2.66666667, 2.88888889,
#        3.11111111, 3.33333333, 3.55555556, 3.77777778, 4.        ])

c = np.random.uniform(0,theroshold,size)
# array([0.02246768, 0.08661081, 0.0932445 , 0.00360563, 0.06539992,
#        0.0107167 , 0.06490493, 0.0558159 , 0.00268924, 0.00070247])

s = np.random.choice(range(size), size+1)
# array([5, 5, 8, 3, 6, 4, 1, 8, 7, 1, 7])

for idx, (i,j) in enumerate(zip(s, s[1:])):
    r[i] += c[idx]
    r[j] -= c[idx]

print(r)
print(r.sum())

Output:

[2.         2.27442369 2.44444444 2.5770278  2.83420567 3.19772192
 3.39512762 3.50172642 3.77532244 4.        ]

30

Answered By - I'mahdi