det (Symbolic Math Toolbox)

Matrix determinant

Syntax

```
r = det(A)
```

Description

det(A) computes the determinant of A, where A is a symbolic or numeric matrix. det(A) returns a symbolic expression, if A is symbolic; a numeric value, if A is numeric.

Examples

The statements

```
syms a b c d;
det([a, b; c, d])
```

return

```
a*d - b*c
```

The statements

```
A = sym([2/3 1/3;1 1])
r = det(A)
```

return

```
A =
[ 2/3, 1/3]
[   1,   1]

r = 1/3
```

cosint diag