May 2018
Beginner
490 pages
13h 16m
English
Content preview from Artificial Intelligence By Example
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Intuitive explanation
PCA takes data and represents it at a higher level.
For example, imagine you are in your bedroom. You have some books, magazines, and music (maybe on your smartphone) around the room. If you consider your room as a 3D Cartesian coordinate system, the objects in your room are all in specific x, y, z coordinates.
For experimentation purposes, take your favorite objects and put them on your bed. Put the objects you like the most near each other and your second choices a bit further away. If you imagine your bed as a 2D Cartesian space, you have just made your objects change dimensions.
They are not in their usual place anymore; they are on your bed and at specific coordinates depending on your tastes.
That is the philosophy ...
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