1. Lesson: 1
What is Machine Learning?
(Layman’s term)
[what is Machine Learning.
In this lesson, we will try to understand machine learning from a Layman’s term.]
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Machines follow instructions
What about a Machine ?
We can ask a machine
• To perform an arithmetic operations such as
• Addition
• Multiplication
• Division
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Machines follow instructions
What about a Machine ?
• Comparison
• Print
• Plotting a chart
[ But, we can ask a machine to make a decision of its own ]
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What is Machine Learning?
[ What do we do?
Just like, what we did to human,
we need to provide experience
to the machine.
]
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What is Machine Learning?
Dataset
[
This what we called as Data
or Training dataset
So, we first need to provide
training dataset to the
machine
]
+
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What is Machine Learning?
Dataset
+
[ Then, devise algorithms and execute programs on the
data
With respect to the underlying target tasks ]
+
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What is Machine Learning?
Dataset
+
[ Then, using the programs, Identify
required rules ]
+ +
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What is Machine Learning?
Dataset
+
[ So that machine can derive inferences
from the data ]
+ + =
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In summary, what is machine learning?
Given a machine learning problem
• Identify and create the appropriate dataset
• Perform computation to learn
• Required rules, pattern and relations
• Output the decision
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Machine Learning Paradigms
• Supervised
• Unsupervised Learning
• Reinforcement learning
[ We as human being solve various types of problem in our day-to-day life, <pause> Various
decisions need to be taken.
Depending on the nature of the problem, machine learning tasks can be broadly divided in ]
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What is Supervised Learning?
[In supervised learning, we need some thing called a Labelled Training Dataset ]
CAR
CAR
BIKE
BIKE
Samples
+
Labels
= Training Dataset
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What is Supervised Learning?
[ Given a labelled dataset, the task is to devise a function which takes the dataset, and a new sample, and
produces an output value.]
CAR
CAR
BIKE
BIKE
Samples
+
Labels
= Training Dataset =
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What is Supervised Learning?
[ Given a labelled dataset, the task is to devise a function which takes the dataset, and a new sample, and
produces an output value.]
CAR
CAR
BIKE
BIKE
Samples
+
Labels
= Training Dataset =
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What is Supervised Learning?
[ Given a labelled dataset, the task is to devise a function which takes the dataset, and a new sample, and
produces an output value.]
CAR
CAR
BIKE
BIKE
Samples
+
Labels
= Training Dataset = CAR
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What is Supervised Learning?
[ If the possible output values of the function are predefined and discrete/categorical, it is called
Classification
CAR
CAR
BIKE
BIKE
Samples
+
Labels
= Training Dataset = CAR
Classification
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What is Supervised Learning?
[ Predefined classes means, it will produce output only from the labels defined in the dataset. For example,
even if we input a bus, it will produce either CAR or BIKE ]
CAR
CAR
BIKE
BIKE
Samples
+
Labels
= Training Dataset = CAR
Classification
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Regression
Dataset
[ If the possible output values of the function are continuous real values, then it is called Regression
= 20500.50
Regression
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[
The classification and Regression problems are supervised, because the decision depends on the
characteristics of the ground truth labels or values present in the dataset, which we define as experience
]
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What is Unsupervised Learning
Dataset
[ In the unsupervised learning, we do not need to know the labels or Ground truth values ]
CAR
CAR
BIKE
BIKE
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What is Unsupervised Learning
Dataset
[ The task is to identify the patterns like group the similar objects together ]
Clustering
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What is Unsupervised Learning
Dataset
[ Association rules like ]
Association Rules Mining