function in normal distribution in Python

Question

How to write multiplication function in normal distribution in Python?

I have an error in my code which is as follows, I want to fix this error.

TypeError:unsupported operand type(s) for *: 'Add' and " NormalDistribution"

How do you possibly expect us to help, without showing the code?? — John Gordon
– John Gordon, Commented Oct 15, 2023 at 15:39

Ömer Sezer · Accepted Answer · 2023-10-15 17:08:54Z

0

If your question is directly => "How to write multiplication function in normal distribution in Python?"

But, if you ask about your error, you should provide the code (people mentioned in the question comments).

Sample code for it:

import numpy as np
from scipy.stats import norm

mu = 0; sigma = 1
sample = np.random.normal(mu, sigma, size=10) # normal distribution series with numpy
result = sample * 2.0  # multiply with constant 2.0

print(result)

Output:

EDIT (after comments):

I created a sample code for PDF (assumption). I only focus on the multiplication "PDF * (expression)". I neglect the integral part due to the simplification. Maybe if u define it like that, u can express it. It may give u a hint:

Sample Code for multiplication of the distribution and expression:

import sympy as sp

# symbols
X, K_c, mu, sigma = sp.symbols('X K_c mu sigma')

# probability density function f(K_c)
f_Kc = (1 / (sigma * sp.sqrt(2 * sp.pi))) * sp.exp(-((K_c - mu)**2) / (2 * sigma**2))

expression = (X**2 + 2*X) * f_Kc  # <= multiplication example

# set the derivative equal to zero and solve for X
solutions = sp.solve(expression, X)

# Print the solutions
print("Solutions for X:")
for sol in solutions:
    print(sol)

Output:

edited Oct 15, 2023 at 17:08

answered Oct 15, 2023 at 15:37

Ömer Sezer

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4 Comments

Hadi Gholizadeh Over a year ago

I want to code the following statement. Kc = Normal and f(kc)=probability function ∫_(Q_o^high)^∞▒〖s_o φ_o Q_o^high+((1+K_h ) α_1-β_1 Q_o^high-γ_1 Q_o^low )(Q_o^high-K_c W_b1 Q_b^cow )f(K_c )dK_c 〗

Ömer Sezer Over a year ago

your statement cannot be understandable, please refactor your question and showcase it in a minimal reproducible example

Hadi Gholizadeh Over a year ago

Suppose we have a parameter that is random and has a normal distribution (KC). We want to take an integral from an expression, for example (x^2+2x) multiplied by the probability density function of the parameter f(kc). (Integral(x,oo)(x^2+2x)*f(kc)dkc) Then take the derivative of this integral with respect to variable X and set it equal to zero, and the output will be a mathematical formula.

JohanC Over a year ago

@HadiGholizadeh Please edit your post and add the missing code. Code can be automatically formatted if you add triple backquotes (````) on the lines before and after the code.

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