StatQuest: Random Forests Part 1 - Building, Using and Evaluating

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  • เผยแพร่เมื่อ 16 มิ.ย. 2024
  • Random Forests make a simple, yet effective, machine learning method. They are made out of decision trees, but don't have the same problems with accuracy. In this video, I walk you through the steps to build, use and evaluate a random forest.
    NOTE: Random Forests are made from Decision Trees, so if you don't know about those, here's the Quest: • Decision and Classific...
    ALSO NOTE: This StatQuest is based on Leo Breiman's (one of the creators of Random Forests) website: www.stat.berkeley.edu/~breima...
    For a complete index of all the StatQuest videos, check out:
    statquest.org/video-index/
    If you'd like to support StatQuest, please consider...
    Buy The StatQuest Illustrated Guide to Machine Learning!!!
    PDF - statquest.gumroad.com/l/wvtmc
    Paperback - www.amazon.com/dp/B09ZCKR4H6
    Kindle eBook - www.amazon.com/dp/B09ZG79HXC
    Patreon: / statquest
    ...or...
    TH-cam Membership: / @statquest
    ...a cool StatQuest t-shirt or sweatshirt:
    shop.spreadshirt.com/statques...
    ...buying one or two of my songs (or go large and get a whole album!)
    joshuastarmer.bandcamp.com/
    ...or just donating to StatQuest!
    www.paypal.me/statquest
    Lastly, if you want to keep up with me as I research and create new StatQuests, follow me on twitter:
    / joshuastarmer
    0:00 Awesome song and introduction
    0:31 Motivation for using Random Forests
    1:17 Step 1, create a bootstrapped dataset
    2:23 Step 2, create a decision tree a random subset of variables at each step
    4:00 Step 3, repeat steps 1 and 2 a bunch of times
    4:40 Classifying a new sample with a Random Forest
    5:41 Definition of Bagging
    6:03 Evaluating a Random Forest
    8:34 Optimizing the Random Forest
    Corrections:
    3:18 I should have said the same feature (or variable) can be selected multiple times in a tree. Every time we select a subset of features to choose from, we choose from the full list of features, even if we have already used some of those features. Thus, a single feature can appear multiple times in a tree.
    9:28 I say "square" when I meant to say "square root".
    #statquest #randomforest #ML

ความคิดเห็น • 1.3K

  • @statquest
    @statquest  4 ปีที่แล้ว +401

    Corrections:
    3:18 I should have said the same feature (or variable) can be selected multiple times in a tree. Every time we select a subset of features to choose from, we choose from the full list of features, even if we have already used some of those features. Thus, a single feature can appear multiple times in a tree.
    9:28 I say "square" when I meant to say "square root".
    Support StatQuest by buying my book The StatQuest Illustrated Guide to Machine Learning or a Study Guide or Merch!!! statquest.org/statquest-store/

    • @monishaathikesavanpremalat7587
      @monishaathikesavanpremalat7587 4 ปีที่แล้ว +14

      StatQuest with Josh Starmer - Can you explain more on this? I mean how does it work when same variable is selected more than once... Let’s say for example., we have our root node as Good blood circulation - if it is true then it goes to left node and if is false it goes to right node
      Then let’s say our internal node on right side is chest pain and then next internal node below it is weight
      Then as you said we have again selected good blood circulation randomly ... how does it work because right side nodes have bad blood circulation already
      Selecting variables multiple times makes sense when it is continuous variable because it can used again with different threshold values but how come it works with categorical variable

    • @lprashanthi7298
      @lprashanthi7298 4 ปีที่แล้ว

      For the same bootstrap data set we can make different trees with randomly picked variables?

    • @statquest
      @statquest  4 ปีที่แล้ว +7

      No, you only make one tree per boostrapped dataset. What I was trying to say was that all columns/variables/features in that bootstrapped dataset are considered at each node.

    • @statquest
      @statquest  4 ปีที่แล้ว +9

      It’s true. There’s no use in visiting a boolean variable more than once. However, as a general rule, all variables, at least in theory, can be visited more than once in a single tree. The actual implementation may optimize this by omitting boolean variables if they have already been visited.

    • @lprashanthi7298
      @lprashanthi7298 4 ปีที่แล้ว

      @@statquest so here randomly 2 is picked at each node without taking into account gini ? Is that right

  • @Themojii
    @Themojii 3 ปีที่แล้ว +328

    Please continue what you're doing. TH-cam users are blessed to have you here. Your contents are not long, right to the point, clear and your way of teaching is amazing. If there will be a heaven you will be right in the middle of it.

    • @statquest
      @statquest  3 ปีที่แล้ว +8

      Thank you very much! :)

    • @2DReanimation
      @2DReanimation 3 ปีที่แล้ว +6

      Beats the Wikipedia articles on these subjects by miles! Perhaps if I was more versed in math, I could just read it like the daily newspaper, but as it is, having this clear visualization and examples is a waay superior learning method!

  • @lashlarue7924
    @lashlarue7924 4 ปีที่แล้ว +168

    This video is so well made and so well explained that I comprehend the subject matter even while sitting here drunk AF at my keyboard... *hic*

    • @statquest
      @statquest  4 ปีที่แล้ว +23

      Dang! :)

    • @hichamsalimlyoussi8539
      @hichamsalimlyoussi8539 4 ปีที่แล้ว +6

      Well said ! Understanding a subject is more relying on the teacher's skills to explain clearly than to the student's efforts to trying to understand.

  • @mayconmarcao4554
    @mayconmarcao4554 3 ปีที่แล้ว +42

    Your "BAM!!" always bring me back to the reality when, eventually, my brain takes a nap during the class haha. It makes me go back and rewatch the issue. I really appreciate your art, sir.

    • @statquest
      @statquest  3 ปีที่แล้ว +3

      Awesome! :)

    • @DEEPAKSV99
      @DEEPAKSV99 2 ปีที่แล้ว +1

      Very true. He is so good at teaching!

  • @acdundore
    @acdundore ปีที่แล้ว +3

    Your videos are unbelievably simple to follow and intuitive. You know that someone is a master of their craft when they can explain it to someone else in a concise and easy-to-understand way. Well done, and thank you for all of your videos!

    • @statquest
      @statquest  ปีที่แล้ว

      Wow, thank you!

  • @pallavimanjunath8349
    @pallavimanjunath8349 3 ปีที่แล้ว +36

    I have no background in Machine Learning and was attempting to understand random forests. Watched a bunch of videos but this was the one that actually made it clear to me. Thanks a lot!

    • @statquest
      @statquest  3 ปีที่แล้ว +1

      Glad it was helpful!

  • @yodhakei
    @yodhakei 6 ปีที่แล้ว +504

    Isn't it 'square root' of the number of variables at the end, instead of 'square'?

    • @statquest
      @statquest  6 ปีที่แล้ว +221

      You are correct. I make a slight mistake.

    • @AshisMohanty87
      @AshisMohanty87 5 ปีที่แล้ว +37

      Absolutely, thats what I was breaking my head to understand and thankfully got it clarified from this comment !!!

    • @rajeshs2840
      @rajeshs2840 4 ปีที่แล้ว +1

      Yes You are absolutely Correct..

    • @ugomuohtochukwu1105
      @ugomuohtochukwu1105 4 ปีที่แล้ว +1

      I was just about to write up this query. Absolutely correct

    • @MikhailGavryuchkov
      @MikhailGavryuchkov 4 ปีที่แล้ว +7

      @@statquest I am pretty sure StatQuest will be canonized as a "Video Bible of Machine Learning" some time soon. Sooooo, any slight mistake will have a probability (or likelihood?) of huge changes in the course of humankind history. :))

  • @robertdiniro8881
    @robertdiniro8881 5 ปีที่แล้ว +21

    This is absolutely awesome and so clearly explained. I wish all textbooks were like this. Keep it up !!

    • @2DReanimation
      @2DReanimation 3 ปีที่แล้ว +2

      Indeed! Wikipedia is usually a way to get the information more simply than textbooks, but they bombard you with math formulae right from the beginning on these subjects! ^^
      So this is so much more intuitive!

  • @jjj408_
    @jjj408_ 2 ปีที่แล้ว +4

    Words cannot express how much I love StatQuest!!!!!! Thanks Josh for the amazing videos! I'm definitely gonna recommend StatQuest to my classmates!

    • @statquest
      @statquest  2 ปีที่แล้ว +1

      Thank you very much! :)

  • @shreshthasarkar991
    @shreshthasarkar991 5 ปีที่แล้ว +3

    One of the best tutorial channels. Keep up the good work and helping us all who are in need.

    • @statquest
      @statquest  5 ปีที่แล้ว

      Thank you so much!!! :)

  • @noamills1130
    @noamills1130 ปีที่แล้ว +1

    I love your content! It's super helpful to have all the information presented verbally and written at the same time. I usually use captions, but those often cover up the content which is annoying and the way you do it is so much better. Plus your intros make me giggle. Thank you so much!

    • @statquest
      @statquest  ปีที่แล้ว

      Hooray! I'm glad you like my style! :)

  • @vishalmandhani9571
    @vishalmandhani9571 2 ปีที่แล้ว +2

    Your service to the data science community is very very much valuable...!!! Your videos on basics leaves a long lasting memory..!! Thank you..!!

    • @statquest
      @statquest  2 ปีที่แล้ว +1

      Thank you!

  • @high_fly_bird
    @high_fly_bird 3 ปีที่แล้ว +4

    the presentation is so simple and adorable, and what's more the topic is truly clearly explained! Thanks!! I love this animation and color choice

    • @statquest
      @statquest  3 ปีที่แล้ว

      Thank you very much! :)

  • @mosama22
    @mosama22 2 ปีที่แล้ว +42

    I'm studying Data Science at MIT, you really can't imagine Josh how much StatQuest is helping me, and a couple more channels, before I start any topic I like to tackle it first or just take a general idea, and you can't imagine how much your videos helped! Short, concise, and to the point! I even started to like mice man for god sack! Thank you Josh 🙂

    • @statquest
      @statquest  2 ปีที่แล้ว +1

      Thank you! I'm glad my videos are helpful.

    • @jarosawszyc8287
      @jarosawszyc8287 ปีที่แล้ว

      Hello, can you share what other channels you watch? I'm a student too, and I wish to gain as much knowledge before looking for a job. Have a wonderful day!

    • @mosama22
      @mosama22 ปีที่แล้ว +4

      @@jarosawszyc8287 No one is perfect in everything! Look up by the topic, not by the channel, you'll ALWAYS find someone who explains what you looking for in a very simple and very straight forward way.

    • @mosama22
      @mosama22 ปีที่แล้ว

      @@atharvambokar573 Massachusetts Institute of Technology 🙂

    • @mosama22
      @mosama22 ปีที่แล้ว

      @@atharvambokar573 I wanted to change my career to a Data Analyst, and got accepted for post graduate at MIT. I literally started from scratch.
      Plus what is wrong in creditting people for their efforts.

  • @peiwang3223
    @peiwang3223 5 ปีที่แล้ว +1

    sir, you are always so helpful, when I have problems, the first thing came to my mind is to search the relative topic in your videos, looking forward more videos from you, thank you very much!

  • @ariani86
    @ariani86 5 ปีที่แล้ว +2

    This is the best video I've ever seen to explain Random Forrest! Thanks so much for making this!!Please keep making videos! Love the humor also :)

    • @statquest
      @statquest  5 ปีที่แล้ว

      You're welcome!!! I'm glad you like the video (and my silly jokes)! :)

  • @neelamj8534
    @neelamj8534 5 ปีที่แล้ว +12

    I must say,this is the best video! You made it so easy to understand. And the way you explain it is perfect!

    • @statquest
      @statquest  5 ปีที่แล้ว

      Thank you!!! :)

  • @shwethavasudevan1788
    @shwethavasudevan1788 5 ปีที่แล้ว +3

    I've seen multiple videos and articles explaining Random Forests and I must say this is the best so far. Awesome work!

    • @statquest
      @statquest  5 ปีที่แล้ว

      Thank you very much!!! :)

  • @roshanipatel1307
    @roshanipatel1307 6 ปีที่แล้ว

    You're the best! Out of many tutorials on Internet...this best explains Random forest and its working! Thank you so much :)

  • @sasss7060
    @sasss7060 3 ปีที่แล้ว +1

    i searched for so many tutorials but no one explained it like you. Thank you!!

  • @emmagarland
    @emmagarland 4 ปีที่แล้ว +11

    I really like the pace of these. It helps me get around the terms and have chance for my brain to keep up

  • @utkarshkumar16
    @utkarshkumar16 4 ปีที่แล้ว +11

    I was required to give a ppt on random forest in my class and after going with such a lucid video I am a felling great. Thanks STATSQUEST

  • @hlpan3301
    @hlpan3301 5 ปีที่แล้ว +1

    Wow! Thank you Josh, only after watching your videos about decision tree and random forest, I really get the concepts of them!

    • @statquest
      @statquest  5 ปีที่แล้ว

      Hooray!!! I glad you like the videos and that they were helpful! :)

  • @timharris72
    @timharris72 6 ปีที่แล้ว +2

    These graphical examples are awesome. I love your videos!!

  • @kkomment2152
    @kkomment2152 5 ปีที่แล้ว +148

    "Sir, after your examination we found that you've got heart disease. BAAM"

    • @phan9995
      @phan9995 4 ปีที่แล้ว +30

      "All 100 trees of the random forest predicted that you have a heart disease. HOORAY! "

    • @user-tw4br4ti1h
      @user-tw4br4ti1h 4 หลายเดือนก่อน +1

      It is actually "BAAM?" :D

    • @jayeshparmar2603
      @jayeshparmar2603 หลายเดือนก่อน +1

      ​@@phan9995Double baam!!

  • @azizlarabi1941
    @azizlarabi1941 5 ปีที่แล้ว +215

    Can I say BAAM in an interview after explaining what is Random Forests?

    • @imrankhanissm
      @imrankhanissm 4 ปีที่แล้ว +123

      Yes but then interviewer will also say DOUBLE BAAM after kicking you out

    • @prat-man
      @prat-man 4 ปีที่แล้ว +1

      @@imrankhanissm XD

    • @shihyusung
      @shihyusung 4 ปีที่แล้ว +1

      @@imrankhanissm lmao

    • @roh_95
      @roh_95 4 ปีที่แล้ว +2

      @@imrankhanissm 😂🤣😁

    • @amrutajahagirdar7438
      @amrutajahagirdar7438 4 ปีที่แล้ว +2

      haha lol

  • @LilyMyLolita
    @LilyMyLolita 6 ปีที่แล้ว +3

    You are the only one who clearly explains how the *size of bootstrap* can be the same as the *size of the original train data* . Thanks!

    • @statquest
      @statquest  6 ปีที่แล้ว

      You're welcome!!! Hooray! I'm glad it was clearly explained. :)

  • @PRUTHVIRAJRGEEB
    @PRUTHVIRAJRGEEB 3 ปีที่แล้ว +1

    This is one lovely presentation on Random Forests! Thanks a ton for making it easy for us to understand.

    • @statquest
      @statquest  3 ปีที่แล้ว

      Thank you very much! :)

  • @atakanekiz
    @atakanekiz 4 ปีที่แล้ว +12

    Your videos deserve a million kudos. They should be a legit applied statistics class for biologists like myself. Please continue your amazing work! I invite everybody to support Josh with as little as $1 a month.

    • @statquest
      @statquest  4 ปีที่แล้ว

      Thank you very much for supporting StatQuest! It means a lot to me.

  • @heart328mind
    @heart328mind 4 ปีที่แล้ว +5

    easily the best channel for data science/machine learning. respect

    • @statquest
      @statquest  4 ปีที่แล้ว

      Thank you very much! :)

    • @simonweppe7131
      @simonweppe7131 ปีที่แล้ว +1

      @@statquest agreed 100%

  • @MrPilz28
    @MrPilz28 2 ปีที่แล้ว +2

    Just discovered your channel. I really like your work. Love the funny moments you add in it. Thank you for clarifying those concepts!

    • @statquest
      @statquest  2 ปีที่แล้ว

      Awesome, thank you!

  • @sfundoy5dube59
    @sfundoy5dube59 2 ปีที่แล้ว +2

    You're so cool Josh, by only first listening to your song, I knew you'd nail this topic just as usual. You're much appreciated Sir Starmer

  • @adosub
    @adosub 5 ปีที่แล้ว +3

    very good approach, genious simplicity and to the point, helps anyone learn(even me). I even stopped skipping the "music" to pay my respects to you Josh!

    • @statquest
      @statquest  5 ปีที่แล้ว

      Thanks so much! I love that you put "music" in quotes. That cracked me up. As long as I get to have my fun, I'm happy to make these videos. ;)

  • @urjaswitayadav3188
    @urjaswitayadav3188 6 ปีที่แล้ว +12

    Great tutorial, as always!

  • @bishwasapkota9621
    @bishwasapkota9621 6 ปีที่แล้ว

    Really good tutorial. It's always the best to explain using real examples. Good job!!!

  • @L.-..
    @L.-.. 4 ปีที่แล้ว +2

    I love StatQuest. You really make statistics enjoyable. BAM!!!!!!!!
    Thank you for your time and effort in making these videos. You have helped out a lot of students.
    Please keep up the good work. Keep them coming.

    • @statquest
      @statquest  4 ปีที่แล้ว +1

      Thank you very much! :)

    • @L.-..
      @L.-.. 4 ปีที่แล้ว

      @@statquest hello there.. could you please clarify the doubt that was asked in your pinned comment.. about choosing the same features again at different level in the decision tree..

  • @martinotanasini3716
    @martinotanasini3716 3 ปีที่แล้ว +4

    Heavily relying on these videos to understand the techniques relevant for my Master Thesis in experimental particle physics. Thank you so much, you are the best!

    • @statquest
      @statquest  3 ปีที่แล้ว

      Thank you! I'm glad the videos are helpful. :)

    • @KamiK4ze
      @KamiK4ze ปีที่แล้ว

      I'm also using this for my Master Thesis :D

  • @saifhakeam8599
    @saifhakeam8599 3 ปีที่แล้ว +3

    Man you're a legend. LOVE Your content especially the music.

    • @statquest
      @statquest  3 ปีที่แล้ว

      Glad you enjoy it!

  • @joeyzalman8254
    @joeyzalman8254 2 ปีที่แล้ว +1

    Thank you for another great video, i love how you are to the point and explain everything in such an easy way

    • @statquest
      @statquest  2 ปีที่แล้ว

      Glad you like them!

  • @harinijeyaraman8789
    @harinijeyaraman8789 3 ปีที่แล้ว +1

    This was such an awesome and a cool video !! Found this helpful :) Kudos for making this video, and hope you continue with your Quest !!

    • @statquest
      @statquest  3 ปีที่แล้ว

      Thank you! Will do!

  • @jonathancomputer
    @jonathancomputer 5 ปีที่แล้ว +4

    Great video. Very simple and easy to understand. Nice job!

    • @statquest
      @statquest  5 ปีที่แล้ว

      Thank you! I'm glad to hear you like the video. :)

  • @nevermindshort3
    @nevermindshort3 5 ปีที่แล้ว +29

    Everytime he starts "Bo pi do pi do pi doo" i inadvertently start laughing

  • @neirakurtovic4474
    @neirakurtovic4474 5 ปีที่แล้ว +1

    These videos are so amazing, I absolutely love them! Thank you so much!

    • @statquest
      @statquest  5 ปีที่แล้ว

      Hooray!!! I'm so happy to hear that you like the videos! :)

  • @bakulpatil8478
    @bakulpatil8478 3 ปีที่แล้ว +1

    This is the best video that very well explains random forests.Very Helpful!

    • @statquest
      @statquest  3 ปีที่แล้ว

      Thank you! :)

  • @seanhickey41
    @seanhickey41 4 ปีที่แล้ว +4

    In grad school and am planning on applying the RF method to my air quality data. Your videos have been a life-saver!

    • @statquest
      @statquest  4 ปีที่แล้ว

      Awesome and good luck! :)

    • @MrSpiritmonger
      @MrSpiritmonger 4 ปีที่แล้ว

      @@statquest Hi, I am doing my PhD, I am inspired to do a project just because I learned so much from your video. I learn more from one single video than an entire year of my coursework.

  • @mehdiaiyad7840
    @mehdiaiyad7840 3 ปีที่แล้ว +4

    The "Oh no! Terminology/Jargon alert !" always gets me

  • @vidyasurbhi8274
    @vidyasurbhi8274 ปีที่แล้ว +1

    You are the cutest stat teacher i have came across in my life . Lots of LOVE and Respect.

    • @statquest
      @statquest  ปีที่แล้ว +1

      Wow, thank you!

  • @sadhana2619
    @sadhana2619 2 ปีที่แล้ว +1

    I found this on top of the list while searching and now I don't need any other video to understand it. Thanks

    • @statquest
      @statquest  2 ปีที่แล้ว

      Glad it helped!

  • @guillaumegiroux9425
    @guillaumegiroux9425 4 ปีที่แล้ว +3

    I'm in grad school and I'm supposed to "quote" litterature, yet I just watch StatQuest's videos because they are easy and fast.

  • @khanhtruong3254
    @khanhtruong3254 5 ปีที่แล้ว +3

    In evaluating the random forest, you mention: use trees to classify samples that are not used to build the trees. As a result, the number of trees to test an out-of-bag sample is different from one sample to another, aren't? E.g. a sample can be tested by 4 trees (there are 4 trees that do not use the sample to build), while another sample can be tested by 10 trees.

  • @andrezaluko
    @andrezaluko 5 ปีที่แล้ว +1

    Great job StatQuest! I am in love with this channel.

    • @statquest
      @statquest  5 ปีที่แล้ว

      Hooray!!! I’m so happy to hear that you like StatQuest!

  • @tymothylim6550
    @tymothylim6550 3 ปีที่แล้ว +1

    Thank you very much for this video! It was a great use of visuals to explain the progression of various aspects of this topic (e.g. eventually using the out-of-bag samples to calculate accuracy)!

    • @statquest
      @statquest  3 ปีที่แล้ว

      Glad you enjoyed it!

  • @praveerparmar8157
    @praveerparmar8157 3 ปีที่แล้ว +3

    This video is totally "Out-of-Boot" among all other Random Forest videos on TH-cam 😀

  • @rickandelon9374
    @rickandelon9374 4 ปีที่แล้ว +3

    After learning so much from your videos and then listening to your beautiful sentimental songs makes me cry! ;)

    • @statquest
      @statquest  4 ปีที่แล้ว

      Thank you very much!!!! :)

  • @mohammadaljumaa5427
    @mohammadaljumaa5427 9 หลายเดือนก่อน +1

    I just love your videos. Im attending a bootcamp about Datasceince and all the concepts that the instructor is not explaining as i would understand them, i come to your channel to learn them better. Thanks man ❤❤

    • @statquest
      @statquest  9 หลายเดือนก่อน

      Glad to help!

  • @melakuhailelikka
    @melakuhailelikka 4 ปีที่แล้ว

    Thank you, Josh, for making things much easier. This 10 minutes tutorial is almost tantamount to reading one whole book about random forest decision tree. I heard the piece at 9:39 as '.... square root of the number of variables...."

    • @statquest
      @statquest  4 ปีที่แล้ว +1

      Thanks! Yes, I made a typo at the end of the video and it is mentioned in a pinned comment.

  • @anurajjaiswal4609
    @anurajjaiswal4609 4 ปีที่แล้ว +11

    You are a boon to humanity...Hope you make a lot of money:)

    • @statquest
      @statquest  4 ปีที่แล้ว +3

      That would be awesome! Maybe one day that will happen. :)

  • @big_snake431
    @big_snake431 4 หลายเดือนก่อน +3

    my project is about using random forests on accelerometer data from goats, but Josh is the real goat

    • @statquest
      @statquest  4 หลายเดือนก่อน +1

      bam! That sounds like a pretty cool project!

    • @aristide_F
      @aristide_F 4 หลายเดือนก่อน +1

      Oh Really, This is somewhat what i am working on. I am studying different speedup processes and strategies and I am specifically working on stroke prediction..

    • @big_snake431
      @big_snake431 4 หลายเดือนก่อน

      nice. I am working on an activity tag to classify behavior automatically without observing the animal directly@@aristide_F

  • @aristide_F
    @aristide_F 4 หลายเดือนก่อน +1

    Thank you so much Statquest. in my "quest" to build random forest from scratch in C++, I found this resources soooo usefull. Including the video on the decision tree classifier

    • @statquest
      @statquest  4 หลายเดือนก่อน

      Glad I could help!

  • @feedtowin1309
    @feedtowin1309 2 ปีที่แล้ว +1

    I love your opening song, it makes the content less stressful!

  • @flikkie72
    @flikkie72 4 ปีที่แล้ว +5

    9:36 Typically we start by using the square [root?]

    • @nataliag5045
      @nataliag5045 3 ปีที่แล้ว

      Was wondering the same thing. If we have 5 features we can't bootstrap with 25. It makes more sense if we have 25 variables, to start with 5 for bootstrapping.

  • @danielm793
    @danielm793 5 ปีที่แล้ว +3

    3:37 looks like a warning on a cigarette pack

  • @rickb_NYC
    @rickb_NYC 3 ปีที่แล้ว +1

    This makes it so easy. I understand it well enough to explain it to others. Thanks.

  • @MohammedBakheet
    @MohammedBakheet 4 ปีที่แล้ว +1

    I trust the information you provide so much, to an extent that I press the like button even before I watch the video

  • @Charles-rn3ke
    @Charles-rn3ke 5 ปีที่แล้ว +13

    Finally found an ML tutorial without accent.

  • @CarlosEduardo-je7ns
    @CarlosEduardo-je7ns 5 ปีที่แล้ว +7

    Double out-of-bam

    • @statquest
      @statquest  5 ปีที่แล้ว +3

      I like it! :)

  • @daddychill6925
    @daddychill6925 ปีที่แล้ว +1

    This guy is a living legend, giving us quality content for free

  • @blindprogrammer
    @blindprogrammer 4 ปีที่แล้ว +1

    best explanation so far on TH-cam. thank you!!

    • @statquest
      @statquest  4 ปีที่แล้ว +2

      Thank you! :)

  • @scorpion7434
    @scorpion7434 5 ปีที่แล้ว +4

    There are 7 idiot heaters who down-voted this amazing video... They probably live in pain!!

  • @KingArthurxD
    @KingArthurxD 4 ปีที่แล้ว +3

    This patient has heart disease. BAM!! Congrats

  • @frederiktolberg8002
    @frederiktolberg8002 2 ปีที่แล้ว +2

    It just hit me that its called random forest because its a forest of random trees. This channel is pure gold for bioinformatics students

  • @theunlightenedone6766
    @theunlightenedone6766 4 ปีที่แล้ว +1

    Hey Josh, your videos are very interesting and easy to understand. Keep up the good work, man. The gini impurity could be the 'Gain Ratio Impurity'. The Information Gain Ratio is an important parameter in decision tree learning, so seems plausible to me.

  • @gurjanl8709
    @gurjanl8709 6 ปีที่แล้ว

    probably these best video fora beginner on the internet. Thanks!

  • @bhupen008
    @bhupen008 6 ปีที่แล้ว

    U have got great skills in explaining concepts. Thank you!

  • @saiyesaswymylavarapu6170
    @saiyesaswymylavarapu6170 6 ปีที่แล้ว +2

    Excellent tutorial! His tutorials are underrated.

    • @statquest
      @statquest  6 ปีที่แล้ว

      Thank you!! I'm glad you like this one! :)

  • @karenpedraza9999
    @karenpedraza9999 2 ปีที่แล้ว +1

    thank you very much for this well-crafted and excelllent video!! finally understand bagging

  • @xiaoxiaozhou6956
    @xiaoxiaozhou6956 3 ปีที่แล้ว +1

    I like this, quite clear explanation and hit the points we need to know. Thanks.

    • @statquest
      @statquest  3 ปีที่แล้ว +1

      Thank you! :)

  • @a7med7x7
    @a7med7x7 5 หลายเดือนก่อน +2

    I'll keep saying stat-quest is the best stat tutorials channel ever

    • @statquest
      @statquest  5 หลายเดือนก่อน

      bam!

  • @oluseyiakinboade1673
    @oluseyiakinboade1673 ปีที่แล้ว +1

    Just this video was enough for me to subscribe, Thank you Josh!!!

    • @statquest
      @statquest  ปีที่แล้ว

      Awesome! Thank you!

  • @EMGalbarini
    @EMGalbarini 6 ปีที่แล้ว

    Excellent! You definitely have to continue making educational videos. Congratulations for your work.

  • @megou1678
    @megou1678 2 ปีที่แล้ว +1

    I enjoy the tutorial and your album a lot. Math + music, what a combination.
    thanks for the content this helps me more than my couple hundred dollar textbooks.

    • @statquest
      @statquest  2 ปีที่แล้ว

      Thank you very much!!!! :)

  • @nematgholinejad3668
    @nematgholinejad3668 4 ปีที่แล้ว +1

    Oh good..! I understood random forest concept after watching this video. Thanks so much

    • @statquest
      @statquest  4 ปีที่แล้ว

      Hooray!! I'm glad the video was helpful. :)

  • @eduardorosendo3208
    @eduardorosendo3208 2 ปีที่แล้ว +1

    Amazing videos!! Your way of teaching is amazing and the animation is great!

    • @statquest
      @statquest  2 ปีที่แล้ว

      Thanks a lot!

  • @bibhunanda480
    @bibhunanda480 5 ปีที่แล้ว +2

    Respect ,The way you have present Random forest

    • @statquest
      @statquest  5 ปีที่แล้ว

      Thank you! :)

  • @AradAshrafi
    @AradAshrafi 2 ปีที่แล้ว +1

    Your songs are also amazing. I loved the last album you shared on Bandcamp. It motivates me to continue my passion for music as well as my studies in Computer Science.

    • @statquest
      @statquest  2 ปีที่แล้ว

      Happy to hear that!

  • @manideepgupta2433
    @manideepgupta2433 5 ปีที่แล้ว +1

    Bam Bam Double Bam!!! Awesome Tutorial Videos and very helpful!!

  • @yoonahkim7912
    @yoonahkim7912 5 ปีที่แล้ว +1

    I love the way you explain. so clear and helpful ! Thanks

    • @statquest
      @statquest  5 ปีที่แล้ว

      You're welcome!!! I'm glad to hear you like this video. :)

  • @mobime6682
    @mobime6682 2 ปีที่แล้ว +1

    I can't wait to work through all your videos!

    • @statquest
      @statquest  2 ปีที่แล้ว

      Hope you enjoy!

  • @hk91v29
    @hk91v29 4 ปีที่แล้ว +1

    Thank you for sharing this easy way to understand RF!

  • @sandeshbirla4331
    @sandeshbirla4331 3 ปีที่แล้ว +1

    Great explanation, made concepts simple and easy to understand!

  • @mariebonduelle4716
    @mariebonduelle4716 2 หลายเดือนก่อน +1

    OMG you saved my day ! I am currently preparing a phd exam, and I was lost about random forest, now I can easily breath thanks to your amazing video ! Thanks a lot

    • @statquest
      @statquest  2 หลายเดือนก่อน

      Good luck!

  • @MontahaAlriQa
    @MontahaAlriQa 5 ปีที่แล้ว +2

    Your channel has saved my research career

    • @statquest
      @statquest  5 ปีที่แล้ว +1

      Hooray! :)

  • @myaimine3921
    @myaimine3921 2 ปีที่แล้ว +1

    Oh my god you made it easy to understand. Please keep this process.

  • @ahmadz113
    @ahmadz113 3 ปีที่แล้ว +1

    You are the best man , keep doing what you are doing !

    • @statquest
      @statquest  3 ปีที่แล้ว

      Thank you! :)

  • @Govindyatnalkar
    @Govindyatnalkar 3 ปีที่แล้ว +1

    The best explanation for Random forests!

    • @statquest
      @statquest  3 ปีที่แล้ว

      Thank you! :)

  • @vishank7
    @vishank7 4 ปีที่แล้ว +1

    I can't be any happier lol! Thanks a ton for the vid, the explanation is awesome!

    • @statquest
      @statquest  4 ปีที่แล้ว +1

      Hooray! :)

  • @nourabarraa9315
    @nourabarraa9315 5 ปีที่แล้ว +1

    How simple and amazingly comprehensible , thank you for the video ! subscribed right away , keep it up (y)

    • @statquest
      @statquest  5 ปีที่แล้ว

      Hooray!!! I'm glad you like the video and subscribed. :)

  • @pradeepmunikrishnan1164
    @pradeepmunikrishnan1164 4 ปีที่แล้ว +2

    I really started Loving you for your lectures :P

    • @statquest
      @statquest  4 ปีที่แล้ว

      I'm happy to hear that you like my videos so much! :)

  • @lingyahu4645
    @lingyahu4645 2 ปีที่แล้ว +1

    You guys are amazing!!!! So clear and easy to understand especially for me who hate math!!! Thank u!!!

  • @srinivasvalmeti1505
    @srinivasvalmeti1505 ปีที่แล้ว

    I am loving all these videos. The clarity and simplicity in explaining the concepts. Just want to highlight a small error. I guess it is the square root of number of variables (and not the square) that are typically started with.

    • @statquest
      @statquest  ปีที่แล้ว

      Thanks! That error is mentioned in a pinned comment.