add repeat and tile

Author: eric496

numpy.ipynb

@@ -407,6 +407,68 @@
     "print(p)"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "### create an array by repetition"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 17,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[0 0 0 1 1 1 2 2 2]\n",
+      "[[1 2]\n",
+      " [3 4]\n",
+      " [3 4]]\n"
+     ]
+    }
+   ],
+   "source": [
+    "# repeat each element of an array by a specified number of times\n",
+    "# np.repeat(iterable, reps, axis=None)\n",
+    "arr = [0, 1, 2]\n",
+    "print(np.repeat(arr, 3))    # or np.repeat(range(3), 3)\n",
+    "\n",
+    "# repeat along a specified axis with specified number of repetitions\n",
+    "arr = [[1,2], [3,4]]\n",
+    "print(np.repeat(arr, [1,2], axis=0))"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 18,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[0 1 2 0 1 2 0 1 2]\n"
+     ]
+    }
+   ],
+   "source": [
+    "# repeat an array by a specified number of times\n",
+    "arr = [0, 1, 2]\n",
+    "print(np.tile(arr, 3))\n",
+    "\n",
+    "# "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  },
   {
    "cell_type": "markdown",
    "metadata": {},