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normalization

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Innocent Iguana answered on February 4, 2022 Popularity 10/10 Helpfulness 2/10

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The process of bringing values into a standard range so that data
retains intrinsic influence on models without involving bias to the model.
Helps to reduce overfitting for large values that produce large 
parameters/co-efficients in models. ways of normalizations
1) feature-scaling
2) min-max
3) Z-score

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Contributed on Jan 29 2023

Innocent Iguana

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In relational dbms, it is used to
- Reduce redundancy / duplications
- Increase speed of transactions
- Improves integrity
- mostly used 1NF, 2NF, 3NF

1 NF:
- First normal form
- Each cell contains single value
- Each row is unique

2NF:
- Second normal form
- Database must be in 1NF
- Separata table for values that occur frequently in multiple rows for same column
- Make sure to connect the separate table with a foreign key

3NF:
- Third normal form
- Database must be in 2NF
- If a column in a table does not depend on that table's primary key, 
	then separate that unrelated column
- Make sure to connect the separate table with a foreign key

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Contributed on Feb 19 2023

Innocent Iguana

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normalize

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To divide each of the components of a normal by the square root of the sum of their squares. Then, if the normal is thought of as a vector from the origin to the point (nx', ny', nx'), this vector has unit length:

nx' = nx/factor
ny' = ny/factor
nz' = nz/factor

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Contributed on Feb 04 2022

Faithful Flatworm

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normalization

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\frac{value - min}{max - min}

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Source: www.codecademy.com

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Contributed on Sep 27 2022

Worried Wolverine

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normalization

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