Matrix, Vector, Scalar

Defining terms in Matrix math

Scalar §

Just a simple number. $5$ $\pi$ Those are all scalars.

Vectors §

A simple list of numbers, can be vertical or horizontal.

$$\left(\begin{array}{ccc}a& b& c\end{array}\right)$$ $$\left(\begin{array}{c}a\\ b\\ c\end{array}\right)$$

These are both Vectors.

Matrix §

A vector that may have more than one dimension (note: Vectors are also Matrices).

$$\left(\begin{array}{cc}a& b\\ c& d\end{array}\right)$$ $$\left(\begin{array}{ccc}a& b& c\\ d& e& f\end{array}\right)$$

That’s a matrix.

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Source §

Related §

• Matrices