Fixed error in derivative in Full custom model section

Author: rkiman

tutorials/User-Defined-Model/User-Defined-Model.ipynb

@@ -769,9 +769,9 @@
     "    \n",
     "    @staticmethod\n",
     "    def fit_deriv(x, a, b, c, d):\n",
-    "        d_a = np.sin(b*x+c)+d\n",
+    "        d_a = np.sin(b*x+c)\n",
     "        d_b = a*np.cos(b*x+c)*x\n",
-    "        d_c = a*np.sin(b*x+c)\n",
+    "        d_c = a*np.cos(b*x+c)\n",
     "        d_d = np.ones(x.shape)\n",
     "        return [d_a, d_b, d_c, d_d]"
    ]
@@ -882,14 +882,22 @@
   }
  ],
  "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
   "language_info": {
    "codemirror_mode": {
-    "name": "ipython"
+    "name": "ipython",
+    "version": 3
    },
    "file_extension": ".py",
    "mimetype": "text/x-python",
    "name": "python",
-   "nbconvert_exporter": "python"
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.8.5"
   }
  },
  "nbformat": 4,