ส่งการบ้าน assignment

week03/Chapter 03 Numerics and Error Analysis.ipynb.ipynb

@@ -235,6 +235,7 @@
    "cell_type": "code",
    "execution_count": 15,
    "metadata": {
+    "collapsed": true,
     "slideshow": {
      "slide_type": "skip"
     }
@@ -289,6 +290,7 @@
    "cell_type": "code",
    "execution_count": 26,
    "metadata": {
+    "collapsed": true,
     "slideshow": {
      "slide_type": "skip"
     }
@@ -319,6 +321,76 @@
     "* ความรู้เพิ่มเติม: [Fixed-Point Numbers](https://en.wikibooks.org/wiki/Floating_Point/Fixed-Point_Numbers)"
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "1.5\n"
+     ]
+    },
+    {
+     "data": {
+      "text/plain": [
+       "1.5"
+      ]
+     },
+     "execution_count": 6,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "v= [0, 0,0,0,1, 1,0,0]\n",
+    "sign = -1 if v[0] == 1 else 1\n",
+    "value = v[1]*2**3\n",
+    "value += v[2]*2**2\n",
+    "value += v[3]*2**1\n",
+    "value += v[4]*2**0\n",
+    "\n",
+    "value += v[5]*2**(-1)\n",
+    "value += v[6]*2**(-2)\n",
+    "value += v[7]*2**(-3)\n",
+    "\n",
+    "print(sign*value)\n",
+    "[ 2** i for i in range(1,8)]\n",
+    "[ v[i]*2**(4-i) for i in range(1,8) ]\n",
+    "sum([ v[i]*2**(4-i) for i in range(1,8)])"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 8,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def value(v):\n",
+    "    sign = -1 if v[0] == 1 else 1\n",
+    "    return sign*sum([ v[i]*2**(4-i) for i in range(1,8) ])"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 9,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "-2.375\n"
+     ]
+    }
+   ],
+   "source": [
+    "v = [1, 0,0,1,0, 0,1,1]\n",
+    "print( value(v) )"
+   ]
+  },
   {
    "cell_type": "markdown",
    "metadata": {
@@ -472,7 +544,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.5.2"
+   "version": "3.6.1"
   }
  },
  "nbformat": 4,

week03/assignment.py

+#1 homework
+def value(v, pos=4, neg=3):
+
+    sign = -1 if v[0] == 1 else 1
+    return sign*sum([v[i]*2**(pos-i) for i in range(1, pos+neg+1)])
+
+
+
+#2 assignment
+def values(v, pos, neg):
+
+    sign = -1 if int(v[0]) == 1 else 1
+    return sign * sum(int(v[i]) * 2 ** (pos - i) for i in range(1, pos + neg))