Theta answer differs by a factor of 10

S19LPN0163 · May 2, 2020, 11:06am

when i did the code side by side with prateek sirs video it worked but now there is difference in the value of theta i dont know why

github.com

Shreyas1506/Codes/blob/master/ML Doubts/doubt.ipynb

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [],
   "source": [
    "import numpy as np\n",
    "import matplotlib.pyplot as plt\n",
    "import pandas as pd"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [],
   "source": [
    "from jupyterthemes import jtplot\n",

This file has been truncated. show original

S18CRX0120 · May 2, 2020, 11:31am

Hey @S19LPN0163, check your learning rate and number of epochs and see if its same.

S19LPN0163 · May 2, 2020, 11:41am

If I set the learning rate to 1 then I am getting close to the answer the number of epochs is not affecting the value of theta where as increase in learning decreases theta by the same factor

S18CRX0120 · May 2, 2020, 11:44am

Hey @S19LPN0163, okay than use learning rate =1

S19LPN0163 · May 2, 2020, 12:00pm

But that should not change no for the same dataset because when I did it by watching the video I used the learning rate as the video and got the answer but know when the code is almost the same I am unable to get the answer. What I want to know is why am I getting different answer when the code is almost same as the video. I want to understand where I am going wrong due to which I need to alter the learning rate in order to get the answer

S18CRX0120 · May 2, 2020, 12:07pm

Hey @S19LPN0163, if you have not used minibatch etc, than the answer should not differ. The best way to check is try running the same code from github, cb.lk/ml18 and check what it produces, if it produces same as in video, than there is somewhere error in your code.

S19LPN0163 · May 2, 2020, 12:19pm

Ya ml18 gives the answer same as in video and I even tried to find the error in my code but I couldn’t find it can you please look into it once
Thank you

S18CRX0120 · May 2, 2020, 12:25pm

Hey @S19LPN0163, this suggests that there is very minute error, in your code, its not feasible at my end to do that part. You need to do that yourself, try replacing function by function from sir’s code. You need to somehow manage this yourself.

S18CRX0120 · May 7, 2020, 4:10am

I hope I’ve cleared your doubt. I ask you to please rate your experience here
Your feedback is very important. It helps us improve our platform and hence provide you
the learning experience you deserve.

On the off chance, you still have some questions or not find the answers satisfactory, you may reopen
the doubt.