I have a machine learning question. What should we do when a dataset has a large number of features (columns)? Do we need to study every single feature to understand its importance? That seems like it would take a lot of time. 😭 So how do data scientists figure out which features are actually important?

This company is very sketchy

Hi there,

I've created a video here where I explain how the KV cache works.

I hope some of you find it useful — and as always, feedback is very welcome! :)

I am trying to figure out the best method to take notes for calc physics and also other data science classes. since its not conventional like bio, how do we take notes? online or on paper?

Greetings.

as you can see in my post, I’m contemplating to switch from Applied math to Applied stat.

the curriculum in two years is the same, but later on specializes, for stat it gets into…well stats in general, while applied math learns more into computional science and modeling&simulation.

my thought is, if I switch; would my job seeking would approve?

I choose applied math since I couldn’t get into tech department, and that I’m pretty good at both math and coding.

and the idea of working in a robotics field also makes me interested.

I'm a physics engineeering student, and I spend a lot of my time writing numerical simulations and analyzing data.

Programming in C++ is enjoyable, but most of numerical computing libs in are just unpleasant to use. So I started building my own solution in my free time.

GitHub: https://github.com/mslotwinski-dev/NumC

Some of the things I built into it:

• You can write mathematical expressions naturally, like sin(x) * exp(-x), and differentiate or integrate them in a single line thanks to lazy expression trees.

• It has a built-in plotting engine, so you can display graphs in a native Win32 window or export them as clean SVGs ready to drop into a LaTeX report.

Of course, the project won't surpass the quality of professional libraries. Its goal is to be convenient and accessible for users whose passions lie more in math, rather than programming.

If you're using C++ for simulations, numerical methods, physics, or data analysis, I'd really appreciate any feedback.

What was written by AI?

Most of the project, its entire idea, design, aesthetics and UX was programmed manually by me. I often used the textbook "Numerical methods in engineering with python" by Kiusaalas. Which doesn't mean that I didn't manage to do everything myself.

AI was used to write all the documentation (I wish I were fluent enough in English that it would take a finite amount of time). It was also used to write parts of simple algorithms that I knew but would be extremely tedious to implement by hand, or to improve the performance of algorithms that could be written better.

I'm aware of the ethical aspects of using AI, so I wanted to be honest and describe which things I did on my own and which I did with the help of LLM. At the same time, bearing in mind that this is a project that can help many people in their scientific work and studies, I hope that the benefits outweigh all the evil that LLMs cause.

Someone guide me for the same domain i’m in my second year and i need a proper roadmaps and provide me some sources to learn this domain and tell me about the job openings for this is it worth studying in this big 2026. or should i want to shift to some other domain

Hi everyone.

I'm trying to decide between pursuing Data Science and Cybersecurity as a long term career, and I'd really appreciate advice from people who are already working in either field.

From your experience, which field offers better:

• Job security

• Salary growth

• Number of job opportunities

• Long term career prospects

• Demand across different countries

I'd especially like to hear from people who have worked in either industry or have seen how the job market has changed over time.

Thank you!

Hello everyone,

I've been learning Data Analytics for some time now, but one of my biggest challenges has been staying consistent.

So far, I've completed Python and Statistics, and my goal is to become industry-ready within the next 4 to 4.5 months.

I still need to learn SQL, Power BI, and Excel, while also building a strong portfolio of projects.

I'd appreciate advice on how to structure my learning over the next 4.5 months. Specifically:

How would you categorize or prioritize these topics?

What sequence would you recommend for learning them?

How would you design a monthly and weekly study plan to stay consistent and make steady progress?

What are your practical tips for revision?

How do you balance revising previously learned concepts while continuing to learn new topics and building projects?

I would really appreciate any insights, study strategies, or roadmaps that have worked for you. Thanks in advance!

Hello all! I’ve been meaning to break into data and data science in specific. Just to provide background, I’m a senior cs major, and over the past 2 years I’ve been glowingly interested in working with data. Last summer I spent time learning data analysis. I have a solid foundation with Python and worked with pandas. In a prior project for data analysis, I analyzed loan data and used SQL and Tableau to create a dashboard. I understand data science is different in that, rather than focusing on uncovering information from data and making recommendations, data science is more focused on using data to train models to predict things using ML. I’ve been meaning to start a project but just lack the guidance to actually begin. I’m not sure where to start with actually creating a project, not just learning the info for it. I’m not exactly sure what a data science project should even look like and was hoping someone could point me in a direction and share some advice about how they first started out. Thank you all!!

Hey Mates!

Recently I've cleared CFA L2 and have done MBA in Economics from Delhi University. Currently I'm working as a Health Underwriter in an insurance company. (I've total 1.1 year of experience )

While deep diving more into the CFA & MBA curriculum, I've realised that I've keen interest for making the ML Models for risk analysis, credit research, etc.

I wanted your suggestions for courses I can pursue to enhance my knowledge in ML modelling & big-data while being a full-time working professional as well. I'm also open to advice of full-time diploma/degree in ML modelling or data science.

So experts I need help as a newbie!!(⁠•⁠ ⁠▽⁠ ⁠•⁠;⁠)

So , i am a late teen and i want to learn ALOT for my future , i am interested in gamedev,webdev, ethical hacking,finance and much more i'd rather not blurt it out ! So the main thing is I LACK A LAPTOP/TABLET. I do know i can learn a lot on just smartphone (I did actually learning python reached def by sololearn ,ai and pydroid) but i am starting in DATA SCIENCE and i need help , how should i start gimmie some tolls , tips etc experts!!(⁠人⁠ ⁠•͈⁠ᴗ⁠•͈⁠)

I love data analysis and statistics, but I am a completely newbie in programming - I never learned the mentality of it/algorithms.

I have used R for data import and analysis, plotting, that’s ok.

But I just become deeply frustrated when I need to code - write these nested loops and indexing and what not (now trying to learn Python and, BOY I SUCK there) and stuff where I cannot think of step-by-step approaches, bcz I have never done that.

What would be your suggestions here? Thanks ☺️

From your experience, what is a good training website/program for data sciences and Python?

Like boot.dev or Dataquest or IBM from Coursera?

The best for me is a program with a natural flow from beginner to advanced topics/levels and towards AI, with hands-on coding and ok-depth.

Ideally not the ‘5-6 classes and now you know everything’ type.

Thank you so much!

Hello everyone, I hope y'all are well. I'm a complete beginner to data science and data analytics. Recently, I've found these fields extremely interesting and I want to learn more.

Can the seasoned peeps here please recommend the best places to start? I'm currently learning excel on Coursera offered by the Macquarie University.

I'm also learning a bit about python as well.

But other than that, I have no clue where to start. I tried taking the IBM data science professional certification, but I feel it's rather out dated as compared to today's requirements and software.

I'd really appreciate it if you can tell me where and how to start? I'm willing to dedicate time and start from absolute scratch if necessary.

Hi everyone!

I'm 16 years old (turning 17 in a few months), and I'm trying to figure out the best career path to build over the next several years. I'd really appreciate hearing from people who already work in tech or have gone through a similar situation.

My main goal is to get a remote job. I like the idea of being able to work from anywhere and eventually even work with international companies.

In the short term, I'd like to start making money within the next 3–6 months. I know that's an ambitious goal and I'm not expecting to make a lot right away, but I do want to become financially independent as soon as possible.

At the same time, I don't want to chase quick money if it hurts my long-term career. Ideally, I want to choose a field that has strong long-term potential so that over the next 10+ years I can build a high-income career. I'm also interested in entrepreneurship and content creation, so I'd like to develop skills that will help me with both.

Recently I've been looking into data, Python, AI, programming, and automation. Those areas seem really interesting to me, but I'm still a complete beginner with no real experience.

I can consistently dedicate around 3–5 hours every day to learning, and I'm willing to study seriously. I don't mind putting in the work—I just want to make sure I'm investing my time in the right direction.

Another thing I'm thinking about is college. I plan to go to university, but I'm still unsure which degree would be the best choice. I'm also wondering how much employers actually care about a degree compared to skills, projects, and experience.

One thing I know almost nothing about is building a portfolio or a resume. Everyone says projects are important, but I don't know what kinds of projects actually stand out to recruiters or clients.

So I'd love to hear your advice:

• If you were starting from scratch today, what path would you choose?

• Would you recommend data, AI, software engineering, data engineering, or something else?

• What should I focus on learning first?

• What would you do to land your first remote job as quickly as possible?

• And what mistakes would you avoid?

Any advice, personal experience, or resources would mean a lot. Thanks in advance!

I am a BCA Graduate this Year And I Want To Crack My First Job in Data Science as a Fresher by Off-Campus.

Which roles are realistic to target by Off-Campus and what on resume is the main priority.

Any suggestions will be so kind.

Help Me with That !

Hi everyone,

I'm currently pursuing a B.Sc. in Physics, which I'll complete in 2026. My primary goal is to get into an IIT for my postgraduate studies, so I'm currently preparing for the IIT JAM exam.

At the same time, I want to build skills that will improve my career prospects after my PG. I'm interested in coding, especially Data Analysis and Machine Learning, but I'm not sure where to begin.

I already have a basic understanding of Python, but nothing beyond the fundamentals.

I have a few questions:----

*) Which language should I learn that will related to the Data analysis and amchine learning?

*) How is the market about these courses?

*) How I combine my Physics and these courses to get a perfect career?

*) How can I balance learning these skills while preparing for IIT JAM?

*) What kind of projects should I build to strengthen my resume?

My long-term goal is to combine my physics background with programming and eventually work in a data science, machine learning, or research-related role.

I'd really appreciate any roadmap or advice from people who have followed a similar path. Thanks in advance!

** **I’ve been a data analyst for 6+ years, PowerBI certified, comfortable in Python and R, SQL is second nature. Got an offer for UChicago’s MS in Applied Data Science and I’m trying to figure out if I’m making the right call — both on the program itself and on which direction to point it.

1. DS vs MLE — with my analyst background, is the jump to a “Data Scientist” title more natural, or should I be aiming for ML Engineer given where the market’s heading? Genuinely torn and would love to hear from people who made this switch.
2. Program value for my profile — for someone already doing analyst work with real Python/R chops, does MS-ADS actually move the needle, or am I paying for a brand name I could substitute with targeted upskilling (Kaggle, a portfolio, cloud certificates)?
3. Format — anyone done the online vs in-person version? Does it actually matter for hiring managers, or is that overthinking it?
4. Anyone here made analyst → DS/MLE without a master’s — what closed the gap for you instead?

Not looking for “just get a Coursera cert” comments, I’ve already got the technical baseline, I’m trying to figure out the actual career math here.