Matrix Transforms: nxm, n->m, m->n, n+m->n/m

[Imiebee]

A matrix of dimension nxm
a. transforms a vector of dimension n to a vector of dimension m
b. transforms a vector of dimension m to a vector of dimension n
c. a vector of dimension n+m to a vector of dimension m
d. a vector of dimension n+m to a vector of dimension n

 

[romsek]

Matrix multiplication (note that a vector is just an m x 1 matrix)

(n x m) X (m x k) => (n x k)

See if you can figure it out now.

 

[I like Serena]

Please use a meaningful title. Please don't just "dump" your problem on us. Please show some effort so that the helpers who are helping voluntarily will actually want to help.

 

[HOI]

A matrix of dimension nxm

So which is the number of rows and which is the number of columns?

a. transforms a vector of dimension n to a vector of dimension m
b. transforms a vector of dimension m to a vector of dimension n
c. a vector of dimension n+m to a vector of dimension m
d. a vector of dimension n+m to a vector of dimension n