Statistics Dictionary

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Vectors

Vectors are a type of matrix having only one column or one row.

Vectors come in two flavors: column vectors and row vectors. For example, matrix a is a column vector, and matrix a' is a row vector.

a =    
11
12
33
 
a' =    
11 22 33

We use lower-case, boldface letters to represent column vectors. And since the transpose of a column vector is a row vector, we use lower-case, boldface letters plus a prime to represent row vectors. Thus, vector b would be a column vector, and vector b' would be a row vector.

See also:  Matrix Types | Vector Multiplication