로지스틱 함수

import tkinter as tk

import math

import matplotlib.pyplot as plt

import numpy as np

def logistic_function(L, k, x0, x):

    return L / (1 + math.exp(-k * (x - x0)))

def plot_logistic(L, k, x0):

    x_values = np.linspace(-10, 10, 200)  # X 범위 설정

    y_values = L / (1 + np.exp(-k * (x_values - x0)))  # 로지스틱 함수 계산

    plt.figure(figsize=(8, 6))

    plt.plot(x_values, y_values, label=f"Logistic Function (L={L}, k={k}, x0={x0})")

    plt.xlabel("x")

    plt.ylabel("f(x)")

    plt.title("Logistic Function Graph")

    plt.legend()

    plt.grid(True)

    plt.show()

def calculate_and_plot_logistic():

    try:

        L = float(entry_L.get())

        k = float(entry_k.get())

        x0 = float(entry_x0.get())

        x = float(entry_x.get())

       

        # 결과값 계산 및 출력

        result = logistic_function(L, k, x0, x)

        label_result.config(text=f"Result: {result:.4f}")

       

        # 그래프 그리기

        plot_logistic(L, k, x0)

    except ValueError:

        label_result.config(text="Please enter valid numbers.")

# GUI 설정

root = tk.Tk()

root.title("Logistic Function Calculator and Plotter")

# 라벨과 입력 필드 설정

tk.Label(root, text="L (Maximum value)").grid(row=0, column=0)

entry_L = tk.Entry(root)

entry_L.grid(row=0, column=1)

tk.Label(root, text="k (Growth rate)").grid(row=1, column=0)

entry_k = tk.Entry(root)

entry_k.grid(row=1, column=1)

tk.Label(root, text="x0 (Midpoint)").grid(row=2, column=0)

entry_x0 = tk.Entry(root)

entry_x0.grid(row=2, column=1)

tk.Label(root, text="x (Input value)").grid(row=3, column=0)

entry_x = tk.Entry(root)

entry_x.grid(row=3, column=1)

# 결과 라벨 및 계산 버튼

label_result = tk.Label(root, text="Result: ")

label_result.grid(row=5, column=0, columnspan=2)

button_calculate = tk.Button(root, text="Calculate and Plot", command=calculate_and_plot_logistic)

button_calculate.grid(row=4, column=0, columnspan=2)

# GUI 실행

root.mainloop()

 

 

https://www.tistory.com/event/write-challenge-2024

작심삼주 오블완 챌린지