diff --git a/2024.09.07_plot_number_with_sigmoid_function/plot_number_with_sigmoid_function.py b/2024.09.07_plot_number_with_sigmoid_function/plot_number_with_sigmoid_function.py
new file mode 100644
index 0000000..8c16c5b
--- /dev/null
+++ b/2024.09.07_plot_number_with_sigmoid_function/plot_number_with_sigmoid_function.py
@@ -0,0 +1,16 @@
+import numpy as np
+import matplotlib.pyplot as plt
+
+def sigmoid_function(x):
+    y = 1/(1+np.exp(-x))
+    return y
+
+for num in [5, 10, 20, 30, 40, 50, 100, 200, 300]:
+    x_array = np.linspace(-10, 10, num)
+    y_array = []
+    for x in x_array:
+        y = sigmoid_function(x)
+        y_array.append(y)
+    plt.plot(x_array, y_array, 'o-')
+    plt.title(f'Num={num}')
+    plt.show()
\ No newline at end of file