numel() -> numcoef() fix in notebooks

Author: rballester

docs/tutorials/decompositions.ipynb

@@ -76,7 +76,7 @@
     "\n",
     "def metrics():\n",
     "    print(t)\n",
-    "    print('Compression ratio: {}/{} = {:g}'.format(full.numel(), t.numel(), full.numel() / t.numel()))\n",
+    "    print('Compression ratio: {}/{} = {:g}'.format(full.numel(), t.numcoef(), full.numel() / t.numcoef()))\n",
     "    print('Relative error:', tn.relative_error(full, t))\n",
     "    print('RMSE:', tn.rmse(full, t))\n",
     "    print('R^2:', tn.r_squared(full, t))\n",
@@ -387,7 +387,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.7.3"
+   "version": "3.6.8"
   }
  },
  "nbformat": 4,

docs/tutorials/sobol.ipynb

@@ -82,7 +82,7 @@
     "x, y, z = tn.symbols(N)[:3]\n",
     "start = time.time()\n",
     "print(tn.sobol(t, mask=tn.only(x)))\n",
-    "print('This compressed tensor has {} parameters; computing this index took only {:g}s'.format(t.numel(), time.time()-start))"
+    "print('This compressed tensor has {} parameters; computing this index took only {:g}s'.format(t.numcoef(), time.time()-start))"
    ]
   },
   {