Multiplication of Matrix and vector

[sanlight]

Hello all,
I am new to mathcad, I have a matrix (ixj) and a vector (ix1). I need to multiply each ith row of the matrix and the vector. Eg. My first row is (2,6,1) and second row is (1,2,3) and vector is 2,1,3. My resultant matrix first row should be 4,6,3 and second row should be (2,2,9)...and so on.
Thanks a lot

 

[IRstuff]

Isn't it just Matrix*Vector, resulting in a 2-element vector?

TTFN

FAQ731-376

 

[sanlight]

Hello IRStuff,
Matrix*vector is only 1 - element vector (not a matrix)

 

[IRstuff]

Sorry, I didn't read your post carefully enough. You need to use indices, i:=0;2, j:=0;1

R[sub]i,j[/sub] = M[sub]i,j[/sub]*V[sub]i[/sub]


TTFN

FAQ731-376

 

[Bebokkos]

You don't even need indices. If you have defined your matrix (A) and vector (V), just store your result in vector B=A*V. Thus, if A is (2x2) and V is (2x1) the resulting vector B is 2x1.