Kristen

data scientist - she/her

[Akshay 🚀 @akshay_pachaar]

Linear Regression clearly Explained!

Linear Regression models relationship between a dependant variable (y) & two or more independent variables (x1, x2 ...)

❗️For the sake of simplicity we discuss linear regression with a single independent variable.

Mathematical Representation:

y=mx+c

where:
- y is the dependent variable
- x is the independent variable
- m is the slope of the line
- c is the y intercept

Cost Function:

❗️The goal is to find the best values for m and c that minimize the error between the predicted values & the actual values for all data points.

This is how the cost function looks, a mean squared error:

MSE= 1/N∑(yi​−(m*xi​+c))**2

Where:

- N is the number of data points.
- yi​ is the actual value for the ith data point.
- mxi​+c is the predicted value for the ith data point.

How it works (Optimisation)❓

To minimize the MSE, we can use gradient descent.

The basic idea is to:

- Start with some initial value of m & c
- Compute the gradient of the MSE w.r.t. both m & c.
- Update m & c in the direction of the negative gradient.

Implementation from Scratch:

Now that we understand how things work it's fairly simple to implement linear regression in Python!

Check this out 👇

That's a wrap!

If you interested in:

- Python 🐍
- ML/MLOps 🛠
- CV/NLP 🗣
- LLMs 🧠
- AI Engineering ⚙️

Find me → @akshay_pachaar ✔️
Everyday, I share tutorials on above topics!

I also write a weekly Newsletter on AI Engineering, link in the next tweet!

Cheers!! 🙂

[Kristen @kkakey_]

@DeepaliKank This is very cool!! I’ve never used Figma with my R plots - any tips or resources to get started with figma? Thank you!

[Kristen @kkakey_]

@MapsbyW @jscarto Wow, beautiful!! What tools do you use to create your maps?

[Information is Beautiful @infobeautiful]

What is actually worth doing to make a climate difference? According to data. 🚗 ✈️ 🔋 🌱
🔗 https://t.co/kdADyplnkT
#dataviz #ReduceEmissions

[Kristen @kkakey_]

@researchremora Cool!! How did you render these?

[R-Ladies NYC @RLadiesNYC]

Working on a project and want to collaborate together? Hang with us for coffee and code ☕Saturday ☕May 20th☕ 1pm at Marie Blachère Bakery & Café . Details on our MeetUp page: https://t.co/0glbSQkh9D

[Aman Bhargava 📊 @thedivtagguy]

I wrote a short tutorial on how to access data and create maps like mine from Microsoft's Global Building Footprint dataset using #python and #QGIS. The dataset is *really* cool, and this is just a way to get started with it
https://t.co/xW4oMoRk9t

[Jessica Cogswell 🌸 @jessicogss]

I don’t know who needs to hear this but there is a 30 minute video called “Studio Ghibli Nature Loop” on HBO Max that just plays different pretty scenes from Ghibli movies with ambient sound

[R-Ladies NYC @RLadiesNYC]

This month we are reading 👁️‍🗨️ "Queer Data : Using Gender, Sex and Sexuality Data for Action" by Dr. Kevin Guyan. Come join us for our book club discussion on Saturday 8/20 in Great Hill in Central Park. Details on our Meet Up page.

[@[email protected] @R_LGBTQ]

today is #InternationalCatDay it seems, and there is a Cat Breed dataset on Kaggle for you #Catisticians
https://t.co/njQqtVPnkV

[Philippe Massicotte @philmassicotte]

Just discovered you can create a docker image from for your #rstats project with a one-liner using either the DESCRIPTION file or the `renv` lock file:

[Posit PBC @posit_pbc]

We're excited to announce Quarto, a new open-source scientific and technical publishing system.

Quarto is the next generation of R Markdown and takes what we've learned from the last 10 years and weave it into a more complete, cohesive whole.

Read more: https://t.co/ceO07mFT0V

[Albert Rapp @rappa753]

Blogging is a great opportunity for

📚 learning
🤝 helping others
👨🏽‍💼 building a portfolio and finding jobs

And it has never been so easy to start a blog. To help you, I've created a MASSIVE guide to get you started. Find it at https://t.co/W5qAsSWDhq

Highlights in 🧵 #rstats

[R-Ladies NYC @RLadiesNYC]

Get excited for R-Ladies NYC Summer Social next Thursday 7/21 evening at Lucky. 🍹 https://t.co/NlLPZXZhjf 🍹

[Crystal Lewis @cghlewis.bsky.social @Cghlewis]

Do you have a dataset with some missing values, and another form with the missing values completed? Yesterday I was reminded about the rows_update() #rstats function!

[🔎Julia Evans🔍 @b0rk]

debugging strategy: write a message asking for help

[Michael Roker Data Analytics 📊 @michaelroker]

Putting your work on GitHub probably is the best decision you can make to build your portfolio.

But what makes a good project stand out?

A good README.

Here are 4 ways to make a good README: 🧵

[Kristen @kkakey_]

@ryenlung I love your videos! Congrats on a successful corgicon :D

Will you be restocking the sold-out colors of "Gatsby Corgi Embroidered DAD HAT"? Trying to figure out if I should wait or get one before they're all gone. Thank you!

[Alise Fox @hi_im_alise]

Today I realised I can add emojis to my #Rstats code to help my squiggly brain navigate it! Now I just have to look for the correctly coloured thing instead of a wall of monochromatic text. Look at how tidy and cute my @rstudio document outline is!

[Cara Thompson @cararthompson]

It was a privilege to present "Level Up Your Labels" at the #rstats @_useRconf poster session this afternoon. Thanks for the good questions!

Here's a link to the poster with the full code I used to create the plot.
https://t.co/qOBVGnbNRU

And here are the 5 tips in detail🧵👇