Accuracy is -34% please help

anandprakash1091971 · June 3, 2020, 6:19pm

i use the same code of linear Regression with multiple features which is taught by prateek bhaiya
r2_score of my code for training data is 96
but when i submit i got -34% accurate
plz check my code

prashant_ml · June 3, 2020, 7:12pm

hey @anandprakash1091971 ,
Can you please provide me with link to your code , so that i can have a look and understand what is the main problem.

Thank You.

anandprakash1091971 · June 4, 2020, 1:41am

github.com

CodingJoshi/MachineLearningCodingBlocks/blob/master/Air Quality Prediction Challenge.ipynb

{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Vectorisation Approach"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 28,
   "metadata": {},
   "outputs": [],
   "source": [
    "from sklearn.datasets import load_boston\n",
    "import numpy as np\n",
    "import pandas as pd\n",
    "import matplotlib.pyplot as plt"
   ]

This file has been truncated. show original

this is my code

prashant_ml · June 4, 2020, 5:57am

hey @anandprakash1091971 ,
there were many things being done wrong in the code ,

That you added another with values to be 1 in training set , but not in testing set and to correct it it required many changes .
If you are normalizing training data , then you also need to normalize the test data other wise those non-normalized testing points will act as a kind of outliers to the algorithm. So for now i have not used it.

I have modified your code a bit , and tested my code with train_test_split and it should me 96% accurate. I hope if i would submit this , then i would be achieving score near by 96.

So , have a look at this code

I hope this would resolve your doubt. if still there is some thing that you can’t understand , then you can surely ask me.

Thank You and Happy Coding .

anandprakash1091971 · June 5, 2020, 5:22am

your code is not opening

prashant_ml · June 5, 2020, 5:42am

sorry for that.
Try this on this link

anandprakash1091971 · June 5, 2020, 5:47am

no problem sir
now i my code accuracy is 96% which is good
but in leaderboard some students have score 100%
is it possible??

prashant_ml · June 5, 2020, 5:52am

No , they are our coding blocks mentors who have submitted the actual csv file , while they were testing the platform.

Great.

prashant_ml · June 5, 2020, 5:56am

hey @anandprakash1091971 ,
I guess your doubt is now resolved. kindly mark this doubt as resolved in your courses’s Ask Doubt Section and also do provide your valuable feedback as it help us to improve this platform and provide you better learning experience.

Thank You and Happy Learning .