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Linear Algebra (what is matrix (dimenssion, How to refer to the element of…
Linear Algebra
what is matrix
dimenssion
How to refer to the element of the matrix
property
matrix multiplication
matrix multiplication is not commutative
marix multiplication is associative
identity matrix
A·I=I·A=A
matrix operation
inverse
transpose
what is vector
How to refer to the element of the vector
Matrix Addition
you can only add matrices of the same dimension
Scalar Multiplication
let`s talk about multiplying matrices by a scalar number
Matrix Matrix Multiplication
very quickly apply all 3 hypotheses to all 4 house sizes to get all 12 predicted prices output by your 3 hypotheses on your 4 hourses
Matrix Vector Multiplication