chore: fungsi derivative

OpenSeries/matematika.py

@@ -547,3 +547,20 @@ def integral(
     for i in range(1, iterasi):
         result += f(a + i * delta)
     return round(result * delta)
+
+
+def turunan(f: Callable[[float], float], x: Union[int, float]) -> float:
+    """
+    Args:
+        f (Callable[[float]float]: input fungsi
+        x (int) : input value
+    Return:
+        float : hasil dari kalkulasi apromasif
+    """
+    # insial nilai h
+    h: float = 0.0001
+    # mengecek tipe data pada nilai input pada paramter a dan b dan iterasi
+    if not isinstance(x, (float, int)):
+        return error.ErrorTipeData(["float", "int"])
+    else:
+        return (f(x + h) - f(x)) / h

testing/main_test.py

@@ -17,6 +17,7 @@
     TestDistribusiBinomial,
     TestGaussian,
     TestIntegral,
+    TestDerivative,
 )
 
 from testing.fisika_test import (
@@ -56,6 +57,7 @@
         TestDistribusiBinomial,
         TestGaussian,
         TestIntegral,
+        TestDerivative,
     ]
 
     testing_fisika: list = [

testing/matematika_test.py

@@ -285,3 +285,25 @@ def f(x):
         hasil = matematika.integral(a, b, iterasi)
         with self.assertRaises(error.ErrorTipeData):
             raise hasil
+
+
+class TestDerivative(unittest.TestCase):
+    def setUp(self):
+        def f(x):
+            return x * x
+
+        self.inputFungsi = f
+        self.inputValue = 4
+
+    def testing_input_value_integer(self):
+        hasil = matematika.turunan(self.inputFungsi, self.inputValue)
+        self.assertAlmostEqual(hasil, 8.000, places=3)
+
+    def testing_input_value_desimal(self):
+        hasil = matematika.turunan(self.inputFungsi, float(self.inputValue))
+        self.assertAlmostEqual(hasil, 8.000, places=3)
+
+    def testing_input_value_string(self):
+        hasil = matematika.turunan(self.inputFungsi, str(self.inputValue))
+        with self.assertRaises(error.ErrorTipeData):
+            raise hasil