Data Analysis: Clustering and Classification (Lec. 1, part 1)

Supervised and unsupervised learning algorithms

[@hemantsah8567]

My left ear feel educated.

[@sahildharia2972]

Same here

[@HishamMoussaDaou]

I came here to learn about data analysis. Ended up learning about the technology you are using for the presentation. For those wondering it is called a 'Lightboard" "Because any written text will be backward in the direct camera view, the text orientation must be flipped, either by pointing the camera toward a mirror reflecting the Lightboard and the presenter or by digitally reversing the image."

[@souravraychaudhuri6600]

The video is vertically flipped. That's it

[@romelfloyd]

One of the best presentations 'complex concepts made so simple'

[@skwon9642]

the technology you use MUST be black magic!!!! I am too amazed by this lol can't focus on the lesson!!!

[@shondarutland4575]

I"m glad I'm not the only one lol. I enjoyed his lectures

[@unaswimothuti]

hahahah i thot i was the only one :D its amazing!

[@siriguna]

Add me too in the list

[@bassface84]

I literally spoke out loud: "what type of sorcery is this!?!?"

[@NoorAli-ie6mn]

Add me too in the list

[@Abshir252]

I'm very proud of myself for listening the entire lecture for the first time. Kudos to this amazing lecturer!

[@rasmipanda1972]

One of the Best Lecture I have ever watched...Thanks Nathan.

[@anshulxkapoor]

After starting numerous lectures on data mining, this was the first one that I watched till the end. Amazing!

[@anuragpujari6887]

One of the best lectures I have ever attended till date. Thank you.

[@cageybee777]

Thank you, Dr. Kutz. Your presentation is very engaging.

[@tahsienal-quraishi3285]

One of the best lectures what ever had .Appreciate Sir

[@nikolasf840]

Excellent presentation, keep making quality videos!

[@sylvialiu1789]

Thank you very much Nathan for the video. It's the best I have seen so far, clear and concise. Please keep up the good work.

[@anshuldwivedi1919]

Hi Nathan, thanks a lot for this series. Very well thought out and extremely helpful.

[@nataliakitaoka2879]

Thank you for the lesson! It just helped me a lot! You're a very good teacher!

[@MrBloggerDada]

Loved both the content and the presentation.

[@runthomas]

this guy is actuall an amazing teacher....anyone who can break such a complex subject down into something I CAN FULLY COMPREHEND...knows his shit....FANTASTIC ....YOU GET AN A for magnificence......what a find. Im a recruiter for quants and Machine Learning..and they keep asking for stuff i Havent got a clue what means....and this is the start of me understanding what they are actually looking for guys to do...THANKS SO MUCH

[@viallykazadimutombo225]

This is really amazing, Thank you so much Nathan

[@ohnotoyota4692]

Thank you Nathan. Extremely clear.

[@gwinose]

Hi, You made my life easier and also made the boring textbook make sense. Thank you, Nathan.

[@sndselecta]

U have a knack for teaching sir.

[@marioandrescruz]

great class. Great teaching method!

[@shuming6440]

Explained in a very simple and clear way, keep it up 👍👍

[@DoomInSor]

Thank you!!Great explanatory videos!

[@olubukolaogunsola5864]

Excellent !!

[@BEPEC]

you're so amazing nathan kutz, great presentation

[@doditsuprianto6474]

thanks Nathan you are awesome. your explanation is good and now i am feeling clear about that subject

[@kartusulap]

you explain it very well .. you make me understand what the differences of them .. thank you ..

[@pauljohny200]

Enjoyed this lecture.!!

[@nabiladestyanaachmad7611]

I really love all of ur explanation, thank you

[@MrHighway29]

THank you sir for making clearing about concepts

[@user-lk1ls2ry1g]

You teach well sirr.

[@hamzacheniti6943]

great explanation thank you

[@smtabishzafar]

nice work

[@junhuang4956]

Great lesson! thx so much!

[@chyldstudios]

slick visualizations!

[@nooreenamirjan7176]

amazing

[@aparnalidhu9232]

you are too good

[@praneethmsr8016]

Thank you so much!

[@madawacko258]

Thank you!

[@devincarson73]

This was so helpful thank you!!!

[@abigailrico5892]

thank you so much you are great at explaining!

[@rpattnaik2000]

Wooowwwwww !!!!! how did u do that !!!!!!!!!!!!!!!!!!! amazed.

[@seneen-sb6wf]

verrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrry useful , thanks you

[@xhourglazzezx]

my left ear is happy, ty

[@fernandojackson7207]

Also: Do we consider all possible partitions of the data set into training and test data. What do we do when the data set is small? And, for each case we consider all choices of K, to see which minimizes error ( say (FP+FN)/Total)?

[@sndselecta]

From the training data, we use a clustering algorithm to identify 2 or more clusters that we designate as classes, further we build a regression line (model) to be able to differentiate those classes with a linear regression model which then feeds into a classification model for new data?

[@protoxpire0]

It's so weird when you notice the sound source difference from stereo. Even though the video is flipped, the audio channels aren't

[@fernandojackson7207]

Thanks, Nathan Kutz, +1 : Is it possible to apply unsupervised with non-continuous/non-numerical variables? I am thinking of Latent classes.

[@fedy3332]

très bonne methodologie d'education

[@chrischidiifegbo5259]

I will vote for you as the world's best tutor. Awesome!!!

[@Dr_Ali.Aljboury]

Nathan kutz . Tq you so much for a good explanation but I have one question why you not show the students how to the work about Cross- validation by numbers for example. . From 1 to 100 so can take from 100 every 80 training and make it by cross validation like 10-20 20-30 . . . . . etc Because I used and it's give me a good results. My regards 😊

[@MrJarod2003]

can u please post videos on how to deal with variables as input for clustering? I. e. how to normalize, how to deal with missing data. when do I bin data etc. also can I used ranked data for unsupervised clustering ? thanks

[@briitfx]

nice lecture, can you tell me which technology you use for your presentation?

[@ad-wo2vg]

it is so upsetting seeing this, I will never get used to the black magic! :)

[@investmentkc6771]

did you reversed the image on the camera so the things you write looks like written in the right direction?? ... THANK YOU for the lectures.

[@kiki1188661]

i think he's really writing it in reverse. it takes much practice but it's possible

[@garrettkelley1032]

Image is reversed because: a) He's right handed and in the video it appears that he's writing with his left; b) Wedding band appears to be on right hand when they're typically worn on the left.

[@kiki1188661]

Garrett Kelley that makes sense but one thing i can't think through, the words. if it's reversed then the words would be wrongly shown? or he was writing in the reverse direction?

[@clickityclickclick]

Quick question. Is cross validating really all that important?

[@skilz8098]

Great video and explanation, however, the audio quality is a bit lacking...

[@Nollie23]

Prieeeet

[@unaswimothuti]

When he said "ALWAYS CROSS VALIDATE" i felt threatened!

[@zes7215]

wrg, no always or usllay convx sayx sucx, ts not interesx coox etc, wrg, no that talkx, no talk machixn, talk humanx, nonex, no shyx etc for such or anyx, doa nyx mw, nonerx, ts just a toolx, use when no such thing as interesx or deficx or degenerax, tendx or not, differex is not interesx or not, think can think any nmw can be perfx, any can be any x interesx kzbin.info/www/bejne/aoi6p6mDoKuHrZI

[@withoutpassid]

Only my left ear can hear :|

[@mayursharma3980]

its because he is standing on the left side of the video

[@petemurphy7164]

@@mayursharma3980 funny 🤔😁🤣

[@MrSlovanprofessor]

nothing about regions and creating spatial units

[@sndselecta]

you recording is in left mono only

[@rajnadkar7915]

richard hendricks in his 50s or 40s

[@cageybee777]

I know how he did it!!! It's truly a genius idea borrowed from magicians. The other side of the glass has a projected template on it that we can't see and he is writing over it, which gives us the impression that he is a master of writing in reverse. The template lines are of one color and as he writes over that color, the color changes, so that he knows what to write next. It is also a great thing that he can use as a big note card so that he stays on topic. Truly a genius idea. By the way, I didn't look that up anywhere. This is my own conclusion.

[@hartmutkern5966]

i know this is three years old, but i read your comment twice and still cant tell if youre kidding or not :D dude he stands behind glass, writes normal and mirrored the video in post production so we can read his writing too.

[@SwatiKumari-sz8ls]

plz ms excel home ,insert ke formula ke sath btaao hindi me

[@scshil]

I couldn't continue because of the technology you used. I was just hearing some sound and thinking about how you had made the video. Writing from left to right. I think you are right handed. But it is showing left handed. Oh!!!!!!!!!!!!!! I was trying to understand the topic not the technology~~~~~~!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!