10.6: Neural Networks: Matrix Math Part 1 - The Nature of Code

[@monkeyrobotsinc.9875]

4:50 i love your skewed perspective projection onto the board as you write further from yourself. 🤣

[@avenger123321]

I like the fact that you don't emphasize optimality initially. I recently took an algorithms course and one of the main key points my professor used to stress upon was that when you start out writing an algorithm, the primary objective is to ensure that it is 'Correct' even if it's slow in it's naive implementation. Only when we can convince ourselves (and others) that it behaves correctly for required inputs, we can move forward to optimizing it if need be. Good content as always Dan :)

[@codethings271]

ur best teacher in the world

[@doxo9597]

He’s really not

[@xgerbil3586]

you just cleared up 2 semesters of physics for me in like 30 seconds..

[@lafeo0077]

Gosh I am in love with your way of teaching. Sooo energetic and confident in your work it gives you the sense of security in learning.

[@5widespread]

Absolutely love Daniel's style!!!! New favorite KZbin Channel!!!!

[@przemekbary]

By far the best course for beginners. Great job!

[@jonjonsantos821]

hi,i am a struggling java programmer that forgot how to program,and seeing your video somehow give a push to start writing code again.LIKE THE PERSONALITY,Thanks.

[@apppples]

Linear algebra is the best math. The most fun and the most intuitive.

[@Ab-cj6gl]

i just started JS 2 days and i was trying to do this on my own 😂😂 i made great progress with arrays and loops and a lot of functions lol but i can see your approach is 10000% better

[@DantevanGemert]

Not only pixels live in a matrix: We *all* live in it

[@ramseshendriks2445]

Hello from the netherlands

[@kadblue2000]

Not really cos we don't know if all fundamental elements are cubic packing

[@arturogoleman5221]

This is glorious, I been tryin to find out about "secret energy coupon code" for a while now, and I think this has helped. Have you heard people talk about - Bannrial Bizarre Bulldozer - (should be on google have a look ) ? It is a smashing one of a kind guide for discovering your spiritual animal and the clues it has to your future success without the hard work. Ive heard some great things about it and my mate got amazing success with it.

[@matke8723]

Lol, i was actually following along and understood everything even if i started learning js a week ago. Watching your videos gives me confidence i can become a good programmer one day. But I'm too hasty. It'll take years for me to learn.

[@Lukas-sc6mt]

3:22 isn't it a 6 dimensional vector? Because your index starts at 0 and x and y is 2 dimensional

[@SLaYeRDutch]

yes

[@furrane]

Yes indeed, basically, for vectors : number of numbers = number of dimensions

[@iminni3459]

yep

[@syedbaryalay5849]

yep, any one would realise that, and btw he is a human

[@morphman86]

You can see it as each entry in a vector being a dimension. We use it in graphics a lot. A vector of X and Y would give us coordinates on a plane, so it is 2 dimensions. A vector of D and V gives us a direction and a velocity and in linear algebra, that is also 2 dimensions. When talking about coding arrays, you usually say that each nested array would be a dimension. In that sense, the matrix of Row rows, filled with Col arrays would be a 2-dimensional array, but it's actually n number of n-dimensional vectors.

[@ColdBlueLight]

i am doing the same thing but in python and man its been a ride. thanks for giving me some more info on how all this works!

[@mgfos207]

you are the coolest guy on youtube bro!

[@mandeepthebest]

You are a god among the teachers.

[@drksydedj]

dude... you are the best ever!

[@paega86]

Even if you movements and hand postures makes me picture you as a ostrich, this was by far one of the most informative and interesting videos I have come across in a long while, hat off and thanks!

[@linsus]

⎛ n ⎞ n! ⎜ ⎟ = ------------- ⎝ k ⎠ k!(n-k)! 3:30 The round bracket notation is oftenly used for displaying binomial coefficients. Further information can be found at the Wikepedia page: en.wikipedia.org/wiki/Binomial_coefficient

[@monkeyrobotsinc.9875]

5:45 HAHAHAHAH you can literally see how your brain is projecting from your view onto the board as you write. even up to the top right corner. actual invisible lines lol.

[@furrane]

Hey Daniel, a quick suggestion in case you havn't recorded the rest of this matrix series : why not create a way to "print" the matrix ? This might be more convenient than having to do what you do now. Also, as a side note, Matrix addition as you define it (matrix + scalar) is kind of a no-no. It works but the correct way is matrix+matrix.

[@davidecologni2851]

I think console.table method is better than create another function 😉

[@furrane]

Sure, I don't know enough of JS to know the best way to do so, but surely there is already something to build on. I know in python I would overwrite the __str__() function so I can print any class. So in any case I think it would be a nice quick tip for jS users to know how to do this cleanly =)

[@davidecologni2851]

Furrane browser console are more dynamic than normal computer console ... in this case browser's console letteraly draw simple table

[@akritskiy]

Hey, I'm really enjoying this series. Thanks! :)

[@rastcheck6037]

Great explanation!! How to implement this in Processing? I got a lil lost since this playlist is a mix of Processing and Javascript :)

[@vimalsheoran8040]

You can use the same ideas and implement the code in Java. Maybe Dan already as uploaded a processing version of it.

[@ariebrons7976]

dear mr Shiffman, thank you for the years of inspiring content. your easy tutorials have led to quite a lot of homebrewed code. now if one might want to share his or hers creation with his or her friends how does one do that? in short: how does one make a p5.js executable? thanks in advance have a nice day arie brons

[@jellohunter7981]

You can’t make it into an eye but maybe run it in an html file. (Everyone can run an html file in browser)

[@aprilmintacpineda2713]

I subscribed! Great explanation!

[@sanchitverma2892]

april fool

[@tester2619]

u very talented sir

[@antonioc760]

Dan which set of tutorials should I follow prior to this in order to instal the Javascript editor you use here (atom?) ?

[@TheCodingTrain]

This is my current workflow! (uses vscode instead of Atom but it's the same) kzbin.info/www/bejne/nXvEZ6qonp2MhLM (Full playlist: kzbin.info/aero/PLRqwX-V7Uu6Zu_uqEA6NqhLzKLACwU74X)

[@MrBittu92]

awesome u deserve a hell lot of views

[@aniekanumoren6088]

is there a matrix math library built in for processing? or do i have to download an external library

[@navjotsingh2251]

Matrices can easily be created using arrays. Thats how i implement them. Though, you need to be comfortable with arrays and loops to do it.

[@CrepeKemado]

Hey Daniel! Why is this video not listed?

[@bastifmbh]

can someone direct me to the sourcecode on github please? can't find it there and mine isn't working...

[@xrayer4412]

what are the cloudflare as the link in the script code? why are your console somewhere else? im so confuesed sence you switched from procesing

[@ridilatrois7991]

is "new Array(rows).fill(new Array(cols).fill(0));" good?

[@emmereffing]

following along in python!

[@sadhlife]

3:20 6 dimentional*

[@Dalendrion]

May I just mention that the word is "dimension"? (Oh hey, I rhymed.) But yes, it is indeed 6-dimensional.

[@wyrIwind]

You can't use dot product with two matrices if the number of columns of the first matrix does not match the number of rows of the second one. Nice video though!

[@pratyush2690]

Is linear algebra sufficient for neural network

[@panjersonten7610]

need lesson for training input and training output for predicting next close price of stock price

[@ranjithkumarpranjithkumar]

can you share Invitation link for Live watch

[@TheCodingTrain]

If you subscribe to the channel and click the "alarm bell" you'll get notifications.

[@samuelmutuswa9708]

thanks so much

[@RenkoGSL]

Gilbert Strange has free Linear Algebra on KZbin... and he literally wrote the book!!! lol :D He recently retired I believe

[@pimborrastelo8249]

Pot product.

[@rusifbudaqov2712]

can you expalin with java?

[@createrkid]

why not just create a 2d Array or is there some reason???

[@cameronnichols9905]

The reason is so we can define what happens when performing different operations. If you try to multiply a 2d array by a 2d array, you won't get the same result if you multiply 2 matrices together

[@gamerslive2067]

which programing language you are using

[@aryparamartha9140]

lol lois java script

[@gamerslive2067]

thanks dear

[@Anakkomputer]

NICE VIDEO

[@NardiPaffon]

No fricking way you're in your 40's. No. Way. I honestly thought you're younger than me, and I'm 29.

[@eccentriccode3158]

Could somebody please eplain why he uses prototype instead of creating normal functions?

[@TheCodingTrain]

This video will help: kzbin.info/www/bejne/noTCiKShrrqUnpo However, if you keep watching the videos you'll see I refactor the code to use ES6 classes soon enough.

[@heatwave2379]

Vector what is it I get confused

[@iminni3459]

Something which has an x and y (and maybe a z etc.) such as a co-ordinate (a location) or a velocity (how fast something is going in a certain direction).

[@andobando4873]

New Vake essentially an n dimensional vector is just an n by 1 matrix.

[@jonatanlaksamana462]

Well just imagine 1 dimensional matrix

[@fanpow]

what is that console used on port 8000???

[@DantevanGemert]

Do you mean the chrome devTools? press f12 or ctrl+shift+i

[@fanpow]

Yes, I've found the answer to my question here: kzbin.info/www/bejne/i3Srq5-Lnql3Z5I

[@siux94]

Its more like coding pain than coding train

[@PatrykUnderhill]

xD

[@edvandossantossousa455]

que vídeo legal.

[@sanchitverma2892]

my heart racing idk why maybe cause i wanted to learn neural networks for a loooong time

[@santiagocalvo]

I just gave this video a like, it's on 1984 likes, i guess george orwll would aprobe haha

[@kswof97]

>_> Lets do it >_>

[@Amrhossam96]

what is neural network applications

[@furrane]

Applications are litterally limitless. From identifying spam emails to finding new patterns in symptomes/diseases in medical research, to an autonomous stock trader making millions.

[@TheRayll]

Hi! are you good now?

[@fasligand7034]

Dan Shiffman is my waifu

[@WistrelChianti]

prototype? That's a new one...

[@alahjandrodagrate1611]

Thank you so much, I hate learning parts of math that I don't actually use or need.

[@muhammadsaqlainishtiaq4467]

These Are Matrices not vectors Dan.

[@zackmercurys]

That hole in your laptop screen. c:

[@AbdulHadi-hs1uf]

I dont understand

[@iminni3459]

ermm... Maybe try something a bit simpler first.

[@sohailape]

it's basic high school math???

[@ker-balkanrider]

In my experience, linear algebra is one of the most fucked up things you can subjet your brain to

[@codytremblay8986]

You don't look old enough to be in school 20 something years ago.