# Matrix transformations

#### Imiebee

##### New member
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

##### Member
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.

#### Klaas van Aarsen

##### MHB Seeker
Staff member
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.

#### Country Boy

##### Well-known member
MHB Math Helper
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