diff --git a/Experiments/Experiment 3.ipynb b/Experiments/Experiment 3.ipynb
index 61830fd..45dcf5f 100644
--- a/Experiments/Experiment 3.ipynb	
+++ b/Experiments/Experiment 3.ipynb	
@@ -67,7 +67,27 @@
    "source": [
     "for row_index in range(5,20): #reading first columns\n",
     "    id, MQ2_R0, MQ3_R0, MQ4_R0, MQ5_R0, MQ6_R0, MQ7_R0, MQ8_R0, MQ9_R0, MQ2_Vm, MQ3_Vm, MQ4_Vm, MQ5_Vm, MQ6_Vm, MQ7_Vm, MQ8_Vm, MQ9_Vm = sheet.row_values(row_index)\n",
-    "    print(id, MQ2_R0, MQ3_R0, MQ4_R0, MQ5_R0, MQ6_R0, MQ7_R0, MQ8_R0, MQ9_R0)\n",
+    "    print(id, MQ2_R0, MQ3_R0, MQ4_R0, MQ5_R0, MQ6_R0, MQ7_R0, MQ8_R0, MQ9_R0)\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {},
+   "outputs": [
+    {
+     "ename": "NameError",
+     "evalue": "name 'sheet' is not defined",
+     "output_type": "error",
+     "traceback": [
+      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
+      "\u001b[1;31mNameError\u001b[0m                                 Traceback (most recent call last)",
+      "\u001b[1;32m<ipython-input-1-d5d2ec2609d9>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[0mx\u001b[0m \u001b[1;33m=\u001b[0m \u001b[0msheet\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mcol_values\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;36m0\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m[\u001b[0m\u001b[1;36m5\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m]\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m\u001b[0;32m      2\u001b[0m \u001b[0mMQ2_R0\u001b[0m \u001b[1;33m=\u001b[0m \u001b[0msheet\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mcol_values\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;36m1\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m[\u001b[0m\u001b[1;36m5\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m]\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m      3\u001b[0m \u001b[0mMQ3_R0\u001b[0m \u001b[1;33m=\u001b[0m \u001b[0msheet\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mcol_values\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;36m2\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m[\u001b[0m\u001b[1;36m5\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m]\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m      4\u001b[0m \u001b[0mMQ4_R0\u001b[0m \u001b[1;33m=\u001b[0m \u001b[0msheet\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mcol_values\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;36m3\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m[\u001b[0m\u001b[1;36m5\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m]\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m      5\u001b[0m \u001b[0mMQ5_R0\u001b[0m \u001b[1;33m=\u001b[0m \u001b[0msheet\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mcol_values\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;36m4\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m[\u001b[0m\u001b[1;36m5\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m]\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n",
+      "\u001b[1;31mNameError\u001b[0m: name 'sheet' is not defined"
+     ]
+    }
+   ],
+   "source": [
     "x = sheet.col_values(0)[5:]\n",
     "MQ2_R0 = sheet.col_values(1)[5:]\n",
     "MQ3_R0 = sheet.col_values(2)[5:]\n",
diff --git a/Experiments/LinearRegression.ipynb b/Experiments/LinearRegression.ipynb
index 2fd6442..bb738a8 100644
--- a/Experiments/LinearRegression.ipynb
+++ b/Experiments/LinearRegression.ipynb
@@ -1,6 +1,58 @@
 {
- "cells": [],
- "metadata": {},
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "!pip install pandas\n",
+    "!pip install xlrd"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import xlrd\n",
+    "book = xlrd.open_workbook(\"Datasheets info.xlsx\")\n",
+    "sheetMQ2 = book.sheet_by_name(\"MQ2 - Pololulu\")\n",
+    "sheetMQ2 = book.sheet_by_name(\"MQ3 - Sparkfun\")\n",
+    "sheetMQ2 = book.sheet_by_name(\"MQ4 - Sparkfun\")\n",
+    "sheetMQ2 = book.sheet_by_name(\"MQ5 - Sparkfun\")\n",
+    "sheetMQ2 = book.sheet_by_name(\"MQ6 - Sparkfun\")\n",
+    "sheetMQ2 = book.sheet_by_name(\"MQ7 - Sparkfun\")\n",
+    "sheetMQ2 = book.sheet_by_name(\"MQ8 - Sparkfun\")\n",
+    "sheetMQ2 = book.sheet_by_name(\"MQ9 - Haoyuelectronics\")\n",
+    "sheetMQ2 = book.sheet_by_name(\"MQ131- Sensorsportal\")\n",
+    "sheetMQ2 = book.sheet_by_name(\"MQ135 - HANWEI\")\n",
+    "sheetMQ2 = book.sheet_by_name(\"MQ131- Sensorsportal\")\n",
+    "sheetMQ2 = book.sheet_by_name(\"MQ131- Sensorsportal\")\n",
+    "sheetMQ2 = book.sheet_by_name(\"MQ131- Sensorsportal\")"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.7.3"
+  }
+ },
  "nbformat": 4,
  "nbformat_minor": 2
 }