Machine Learning Fundamentals: The Confusion Matrix

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One of the fundamental concepts in machine learning is the Confusion Matrix. Combined with Cross Validation, it's how we decide which machine learning method would be best for our dataset. Check out the video to find out how!

NOTE: This video illustrates the confusion matrix concept as described in the Introduction to Statistical Learning, page 145.

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Lastly, a big thanks goes to Cesar Diniz for the Portuguese subtitles.

0:00 Awesome song and introduction
0:24 Motivation for confusion matrices
1:38 Definition of confusion matrix and related terminology
2:44 Confusion matrix example
3:41 Comparing confusion matrices
4:47 A 3x3 confusion matrix.
6:20 Large confusion matrices
6:38 Summary of concepts and main ideas

#statquest #confusionmatrix #ML
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Understood the concept within 2 mins, something my professor was not able to achieve in a three hour lecture, and this video is free to watch. Thank you for the informative and extremely helpful video!

TheBluesFlame
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the Confusion matrix is not so confusing anymore

readsimo
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This is the best video on confusion matrix I have watched. Once again, analogies and storytelling to the rescue

thepraisejames
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I keep coming back for the BAAAMMMM !!!

ronyroy
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The Intro song gives a great relief for us to get rid of confusion...

venkydk
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Had to sign up as a member of StatQuest and support your initiative. Thank you so much for making all this content available. Greetings from Brazil, Josh!

alexandrebernat
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If my software venture succeeds, then I hugely owe it to you. Your pedagogical approach in the topic will benefit many individuals/teams like me. Thank you, sir!

gyulboxing
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I was miserable but you boosted my mood, the intro is on point, BAM!

hendsaud
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"In this case the machine learning algorithm didn't do very well, but can you blame it?, These are all Terrible movies!!... BAM" I laughed like hell. Love StatQuest.

vivekakaviv
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I realize you should know: half of the time I like your videos, it's not because of the teaching. It's just me loving your songs and how you whisper excitedly "StatQuest!" at the beginning. It's the best!

katwoods
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You made me start loving maching learning and statistics, thank you!

JingwenZhou
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Wow very straight forward and clear to understand! I really appreciate the table of contents and bookmarks you've laid out as well. Even for just a short video!

There is so much, even too much, information out there on various topics. And too many people just give a talk, pouring out their expertise without considering how fast they're going, where their audience is coming from.

I felt that wasn't as much the case here. Great job!

lck
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Thank you so much! You explained in 8 minutes what my Data Science Professor took forever to explain. It was so clear and concise.

f.s.
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I'm now double certified in data science, and singly so in digital forensics. I began with stat quest, and I keep using it for refreshers if I have a meeting or interview.
Here I am, prepping for possible interview questions that come up a lot.

thehermitthetower
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Very clearly explained, thank you! As good as always!

yangwang
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I needed to understand confusion matrix as soon as possible. I learned in less than 10 minutes... great!

SoftwareTICs
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Statquest is here to explain things very well, leaving me worry-free. Thank you, Mosh, for being here.

shinyskystar
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Very nice, I'm dealing with the Kuzushiji-49 dataset, and so I have a 49x49 confusion matrix. Helped clear things out a lot!

TheMediinaa
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I really liked how you mixed the sentiments in the bams, depending on the results! Great videos!

pablouribe
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Thank you for explaining the Confusion Matrix! This is super helpful. I keep coming back for more of your videos! THANK YOU.

blessinglotus