Machine Learning for Everyone


Supervised and  Unsupervised Learning



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ML for everyone 1653414504

Supervised
and 
Unsupervised Learning
.


In the first case, the machine has a "supervisor" or a "teacher" who 
gives the machine all the answers, like whether it's a cat in the 
picture or a dog. The teacher has already divided (labeled) the data 
into cats and dogs, and the machine is using these examples to learn. 
One by one. Dog by cat.
Unsupervised learning means the machine is left on its own with a 
pile of animal photos and a task to find out who's who. Data is not 
labeled, there's no teacher, the machine is trying to find any patterns 
on its own. We'll talk about these methods below.
Clearly, the machine will learn faster with a teacher, so it's more 
commonly used in real-life tasks. There are two types of such tasks: 
classification – an object's category prediction, and 
regression – prediction of a specific point on a numeric 
axis
.
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Classification


"Splits objects based at one of the attributes known beforehand. 
Separate socks by based on color, documents based on language, music 
by genre"
Today used for:
– Spam filtering
– Language detection
– A search of similar documents
– Sentiment analysis
– Recognition of handwritten characters and numbers
– Fraud detection
Popular algorithms: 
Naive Bayes

Decision Tree

Logistic Regression

K-Nearest Neighbours

Support Vector Machine
From here onward you can comment with additional information for 
these sections. Feel free to write your examples of tasks. Everything 
is written here based on my own subjective experience.

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