How to learn machine learning and improve your health

Once things go back to normal, what's not going to change? Hint: health and learning.

Hey everyone, Daniel Bourke here.

You’re reading the April 2020 edition of Eat, Move, Learn, Make: A letter for hungry, active, curious creators. If these words don’t describe you, feel free to unsubscribe at any time.

Last month started by addressing the elephant in the room (COVID19). By now, there’s enough about it out there, so we’re going to approach this brief era of history from two angles.

1. What’s not going to change?

2. What’s going to change?

A full-blown pincer manoeuvre (attacking something from both sides).

And as you may have guessed, it’ll be in the theme of machine learning and health. But as you’ll see, the principles we discuss can be applied almost universally.

The time after which nothing was the same

That’s where the best stories start. Or at least they contain an arc which takes a character through a series of events after which nothing was the same.

Let’s pretend this character is you (and me, because I’m thinking about these things too).

When things go back to normal, what’s going to look different to you?

First, it must be understood, there is no universal definition of normal. The beautiful thing about you being the main character in this arc is you get to create it.

Perhaps you’ve realised half the activities you do aren’t required. Or half the crap you own doesn’t bring you joy.

What’s the benefit here?

You’ll see how this ties in below. But the point here is life improves via subtraction.

A formula for learning machine learning (or anything)

I published a video called “Don’t learn machine learning” at the end of last month. A clickbaity title for an underlying message.

Avoid being a donkey.

The donkey problem comes from a story where a donkey is stuck between a bucket of water and a pile of food. It can’t decide if it’s hungry or thirsty and so it glances at the water, then at the food, then back at the water, food, water, food, water.

Eventually, unable to decide on anything, the donkey dies of hunger and thirst.

Perhaps you’ve experienced this problem before. Being stuck between two (or more) things and being so absorbed in the consideration of each that none eventuate.

Now.

There are plenty of ways to look at this. Perhaps, procrastinating on a decision can be helpful.

The longer you wait, the smarter you become, the better decision you make.

Or the procrastination itself is a sign none the options are viable and you should choose none. You know how the saying goes, if you can’t decide, the answer is no.

Let’s tie this back to learning machine learning.

The most consistent question I get asked is, “how do I learn machine learning?”.

Often it’ll come along with things like.

“I’ve got no math experience, can I still learn it?”

“I don’t have a background in statistics or neuroscience, what should I do?”

To which my first reaction is “if everyone needed a background in something before they started, no one would start anything.”

I don’t say this, of course, I’m more polite in my responses but I can be more direct in this letter.

The donkey problem here is clear. Someone has an interest in learning a new topic but is held back by considering the infinite paths which reside in front of them.

The fix?

If none of the existing paths in front of you work, you must create your own.

Here’s one sure-fire way.

1. Use online courses and materials (you’re smart enough to find these, if not, check the one at the bottom of this email) to build a foundation of knowledge. Go for skills, not certificates.

2. Turn your foundation of knowledge into specific knowledge (knowledge which can’t be taught) through creating projects of your own.

Questions.

Which resources are the best?

Many of them are good. Read the reviews. Try one, see if it sparks your curiosity enough to keep going.

What if there’s something better out there?

Donkey problem. Avoid. You’ll figure this out by trying something, seeing if it works for you and moving on if it doesn’t. Remember, you’re smarter doing than you are thinking.

I’ve done some introductory courses, what projects should I work on?

Your own.

How?

Design something which might not work.

Build a toy to impress your customers, your fans, yourself. Don’t worry about making something to impress the competition or your peers.

What if my efforts are wasted?

99% of all effort is wasted. But if you never dedicate any, you’ll never get the chance to strike the 1% which isn’t.

Notice how what we’ve gone through can be applied to learning almost anything.

The most important takeaways being instead of focusing on what’s right at any given moment (impossible to predict), you’re concentrating on the trend.

You’re building the habit of learning (using courses as a foundation) along with the habit of creating (building your own projects).

After a while, you’ll find one implies the other. Soon enough, your creations will fuel your learning and your learning will fuel your creations.

The tools and resources you use to learn something will change over time but how, building a habit of learning, building a habit of experimenting won’t.

Improve your health at the same time as learning machine learning

I promised health would be included here.

Health isn’t going to change.

Lose your health and what do you have?

If you’re learning machine learning, I’m going to give you a new rule.

Every time your model is moving (you’re training a neural network or doing a grid search with a random forest), your body is moving.

Model moving. Body moving.

Perhaps you go for a walk, do some pushups or stretch those tight hips from prolonged sitting.

Why?

A lack of movement leads to a clogged body. When your body is clogged, your mind is clogged. And you don’t want that.

Again, the parallel can be drawn back to learning a new topic.

Of any given topic (especially machine learning) the resources to get started can be vast. Thus the high potential for a donkey problem.

Same with health, there are many dogmas of eating, moving but none are as important as the trend.

Let me be clear.

The habit of movement is more important than the kind of movement.

As with learning and creating, if you want to improve your health, it comes in the form of small actions compounding over time.

Create your own feedback loop

Okay.

You might be thinking, “Daniel, I’m stuck at a donkey problem, what can I do?”.

Aside from what we’ve talked about, here are a couple of steps you can take:

Rate things on a scale. Your health, your learning, your creative outlets, your relationships, other things which are important to you. How do they stack up from 1 to 5? The lowest ones should be addressed first. After you finish reading this, write them down.

30 days. After you’ve got your ratings, devise 1-3 steps you could take for the lowest one(s) over the next 30 days. Less is more here. Start with the smallest possible action. It might be spending 10 minutes walking or reading per day.

The follow-up. A neglected point in any interaction is the follow-up. Don’t underestimate it. At the end of the 30 days redo the ratings and ask yourself:

• What have I removed?

• What have I learned?

• What have I created?

• How have I moved?

• What’s staying the same, what’s not changing?

This activity doesn’t have to take more than an hour. But what you’re doing is creating your own feedback loop. Completely self-driven.

Because.

As you know, no one cares about you as much as you. Whether it’s learning something new or taking care of your health, it’s on you.

Skin in the game

These words would mean nothing if I didn’t try them myself.

(never take advice from someone who hasn’t done the things they preach)

Replicating Airbnb’s Amenity Detection

To build specific knowledge in machine learning, I created my own 42-day project to replicate Airbnb’s Amenity Detection.

Did everything go to plan?

Of course not, but I learned a bunch in the process and created a story to share at the end (what I’m doing now). All whilst building the habit of learning and creating.

You can see:

• The finished project live where you can try and have my machine learning model find amenities in a typical household room (beware, there may be bugs).

• The full process as a playlist on YouTube.

• My unedited notes on how I did it.

A month of movement

In last month’s letter, I said I was starting a daily series of videos with simple bodyweight-only movement sessions you could do in your home to keep moving during self-isolation.

Last Wednesday marked day 30 of #repsforrona (repetitions for Coronavirus).

So if you want inspiration to build the habit of movement, you can follow along with the series.

If you make it to day 30, not only will you have moved for a minimum of 5+ hours, you’ll have learned a bunch of bodyweight-only exercises you can do anywhere.

Learn machine learning

Finally, if you want a one-stop-shop for getting started with machine learning.

A completely beginner-friendly resource which walks you through the main concepts of the topic as well as gets your hands’ dirty writing machine learning code.

You should check out Andrei and I’s machine learning course. It’s created specifically to answer the question, “I want to learn machine learning, where do I start?”.

Until next month.

Keep moving, creating, learning.

Big dogs gotta eat,

Daniel Bourke

PS if you’re going through the practice of creating your own feedback loop, considering how to learn something new or improve your health. And you’d like me to hold you accountable. Send me an email (or reply to this one) and I’ll follow up with you in one month to see your progress.