Merge pull request #19 from maxreiss123/develop

correct typo

Author: maxreiss123

tutorial/JGEP_demo.ipynb

@@ -169,6 +169,7 @@
    "source": [
     "# We install the package: - takes another minute :(\n",
     "using Pkg\n",
+    "using Random\n",
     "Pkg.add(url=\"https://github.com/maxreiss123/GeneExpressionProgramming.jl.git\")"
    ]
   },
@@ -240,7 +241,12 @@
    "source": [
     "#Generate some data\n",
     "x_data = randn(Float64, 2, 1000);\n",
-    "y_data = @. x_data[1,:] * x_data[1,:] + x_data[1,:] * x_data[2,:] - 2 * x_data[2,:] * x_data[2,:];"
+    "y_data = @. x_data[1,:] * x_data[1,:] + x_data[1,:] * x_data[2,:] - 2 * x_data[2,:] * x_data[2,:];\n",
+    "\n",
+    "\n",
+    "x_test = randn(Float64, 2, 1000);\n",
+    "y_test = @. x_data[1,:] * x_data[1,:] + x_data[1,:] * x_data[2,:] - 2 * x_data[2,:] * x_data[2,:];\n",
+    "\n"
    ]
   },
   {