# incrminmax
> Compute a minimum and maximum incrementally.
## Usage
```javascript
var incrminmax = require( '@stdlib/stats/incr/minmax' );
```
#### incrminmax( \[out] )
Returns an accumulator `function` which incrementally computes a minimum and maximum.
```javascript
var accumulator = incrminmax();
```
By default, the returned accumulator `function` returns the minimum and maximum as a two-element `array`. To avoid unnecessary memory allocation, the function supports providing an output (destination) object.
```javascript
var Float64Array = require( '@stdlib/array/float64' );
var accumulator = incrminmax( new Float64Array( 2 ) );
```
#### accumulator( \[x] )
If provided an input value `x`, the accumulator function returns updated minimum and maximum values. If not provided an input value `x`, the accumulator function returns the current minimum and maximum values.
```javascript
var accumulator = incrminmax();
var mm = accumulator();
// returns null
mm = accumulator( 2.0 );
// returns [ 2.0, 2.0 ]
mm = accumulator( 1.0 );
// returns [ 1.0, 2.0 ]
mm = accumulator( 3.0 );
// returns [ 1.0, 3.0 ]
mm = accumulator( -7.0 );
// returns [ -7.0, 3.0 ]
mm = accumulator( -5.0 );
// returns [ -7.0, 3.0 ]
mm = accumulator();
// returns [ -7.0, 3.0 ]
```
## Notes
- Input values are **not** type checked. If provided `NaN`, the accumulated values are equal to `NaN` for **all** future invocations. If non-numeric inputs are possible, you are advised to type check and handle accordingly **before** passing the value to the accumulator function.
## Examples
```javascript
var randu = require( '@stdlib/random/base/randu' );
var incrminmax = require( '@stdlib/stats/incr/minmax' );
var accumulator;
var v;
var i;
// Initialize an accumulator:
accumulator = incrminmax();
// For each simulated datum, update the minimum and maximum...
for ( i = 0; i < 100; i++ ) {
v = randu() * 100.0;
accumulator( v );
}
console.log( accumulator() );
```