Linear Algebra(2) - Span/Basis/Linear Projection
[Linear Algebra +] Key points covariance/correlation coefficient span basis rank project $\vec{a}$ onto $\vec{b}$ 개념 orthogonality unit vectors Gaussian Elimination [Covariance/Correlation Coefficient] $Variance = \frac{\sum(X-\bar{X})^2}{N}$ # A 라는 array가 있다고 가정 A.var(ddof=) # population : ddof = 0 / sample : ddof = 1 ==> # returns variance of 'A' $Standard \ Deviation = \sqrt{Var(X)}$ # A 라는 a..
2021.01.30