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#### Search: #### Identity

Function: identity (<x>) Returns <x> for any argument <x>. 0, 1 < 0, 2 < 1, 2 > 1, 2 > 0], identity); assume (x < -1); map (maybe, [x > 0, x < 0, x < -2]); sublist_indices ([x > 0, x < 0, x < -2], identity); ' title='Identity Example' width='30%' />

Examples:

`identity` may be used as a predicate when the arguments are already Boolean values.

```          (%i1) every (identity, [true, true]);
(%o1)                         true```

There are also some inexact matches for `identity`. Try `?? identity` to see them.

```(%o1)                                true
(%i2) ```

### Related Examples

##### identity-matrix-phi

Cphi: matrix([1,0,0...

Ctheta: matrix([ct,0,...

Cpsi: matrix([cs,ss...

Calculate

##### identity-matrix-phi

Cphi: matrix([1,0,0...

Ctheta: matrix([ct,0,...

Cpsi: matrix([cs,ss...

Calculate

##### identity-matrix

q:matrix([a11,a12,a13...

d:identity(4);

Calculate

##### identity-matrix-phi

Cphi: matrix([1,0,0...

Ctheta: matrix([ct,0,...

Cpsi: matrix([cs,ss...

Calculate

##### identity-matrix-phi

Cphi: matrix([1,0,0...

Ctheta: matrix([ct,0,...

Cpsi: matrix([cs,ss...

Calculate

##### identity-matrix

A:matrix([.8,.1,.1],[...

A.A;

I:identity(3);

Calculate

##### identity-matrix

q:matrix([a11,a12,a13...

d:identity(4);

Calculate

##### identity-matrix-phi

Cphi: matrix([1,0,0...

Ctheta: matrix([ct,0,...

Cpsi: matrix([cs,ss...

Calculate

? identity;

Calculate

##### identity-mode_identity

? mode_identity;

Calculate 