# Gamma Delta Ratio
> Compute the ratio of two [gamma][@stdlib/math/base/special/gamma] functions.
## Usage
```javascript
var gammaDeltaRatio = require( '@stdlib/math/base/special/gamma-delta-ratio' );
```
#### gammaDeltaRatio( z, delta )
Computes the ratio of two [gamma functions][@stdlib/math/base/special/gamma]. Specifically, the function evaluates `Γ( z ) / Γ( z + delta )`.
```javascript
var y = gammaDeltaRatio( 2.0, 3.0 );
// returns ~0.042
y = gammaDeltaRatio( 4.0, 0.5 );
// returns ~0.516
y = gammaDeltaRatio( 100.0, 0.0 );
// returns 1.0
```
## Examples
```javascript
var randu = require( '@stdlib/random/base/randu' );
var gammaDeltaRatio = require( '@stdlib/math/base/special/gamma-delta-ratio' );
var delta;
var z;
var i;
for ( i = 0; i < 100; i++ ) {
z = randu()*10.0;
delta = randu()*10.0;
console.log( 'gamma( %d ) / gamma( %d + %d ) = %d', z, z, delta, gammaDeltaRatio( z, delta ) );
}
```
[@stdlib/math/base/special/gamma]: https://www.npmjs.com/package/@stdlib/math/tree/main/base/special/gamma