initial commit with 2024 materials

hands_on_solutions/logistic_fun/logistic.py

@@ -0,0 +1,25 @@
+import numpy as np
+
+
+def f(x, r):
+    """
+    takes r and x as input and returns r*x*(1-x)
+    """
+    return r * x * (1 - x)
+
+
+def iterate_f(it, xi, r):
+    """
+    takes a number of iterations `it`, a starting value,
+    and a parameter value for r. It should execute f repeatedly (it times),
+    each time using the last result of f as the new input to f. Append each
+    iteration's result to a list l. Finally, convert the list into a numpy
+    array and return it.
+    """
+    x = xi
+    xs = []
+    for _ in range(it):
+        x = f(x, r)
+        xs.append(x)
+
+    return np.array(xs)