- #1
JamesGoh
- 143
- 0
If we want to caculate the projection of a single vector, v=(1,2) (which is an element of an R2 vector space called V) onto the subspace of V (which we call W), do we use
projection of v onto W = <v,w1>w1 + <v,w2>w2 + ... <v,wn>wn
However, if the individual values of v are not known (that is v=(x,y) ), do we calculate the matrix of projection ?
that is, we do A(A[itex]^{T}[/itex]A)[itex]^{-1}[/itex]A[itex]^{T}[/itex]
If we have to determine the matrix of projection, is it because we don't know what x and y is, so the safe bet is to determine the matrix of projection ?
projection of v onto W = <v,w1>w1 + <v,w2>w2 + ... <v,wn>wn
However, if the individual values of v are not known (that is v=(x,y) ), do we calculate the matrix of projection ?
that is, we do A(A[itex]^{T}[/itex]A)[itex]^{-1}[/itex]A[itex]^{T}[/itex]
If we have to determine the matrix of projection, is it because we don't know what x and y is, so the safe bet is to determine the matrix of projection ?