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refactor: update blas/ext/base/gnansum to follow current project conventions #4639

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54 changes: 20 additions & 34 deletions lib/node_modules/@stdlib/blas/ext/base/gnansum/README.md
Original file line number Diff line number Diff line change
Expand Up @@ -36,33 +36,29 @@ limitations under the License.
var gnansum = require( '@stdlib/blas/ext/base/gnansum' );
```

#### gnansum( N, x, stride )
#### gnansum( N, x, strideX )

Computes the sum of strided array elements, ignoring `NaN` values.

```javascript
var x = [ 1.0, -2.0, NaN, 2.0 ];
var N = x.length;

var v = gnansum( N, x, 1 );
var v = gnansum( x.length, x, 1 );
// returns 1.0
```

The function has the following parameters:

- **N**: number of indexed elements.
- **x**: input [`Array`][mdn-array] or [`typed array`][mdn-typed-array].
- **stride**: index increment for `x`.
- **strideX**: stride length for `x`.

The `N` and `stride` parameters determine which elements in `x` are accessed at runtime. For example, to compute the sum of every other element in `x`,
The `N` and stride parameters determine which elements in the strided array are accessed at runtime. For example, to compute the sum of every other element:

```javascript
var floor = require( '@stdlib/math/base/special/floor' );

var x = [ 1.0, 2.0, 2.0, -7.0, -2.0, 3.0, 4.0, 2.0, NaN, NaN ];
var N = floor( x.length / 2 );

var v = gnansum( N, x, 2 );
var v = gnansum( 5, x, 2 );
// returns 5.0
```

Expand All @@ -72,42 +68,35 @@ Note that indexing is relative to the first index. To introduce an offset, use [

```javascript
var Float64Array = require( '@stdlib/array/float64' );
var floor = require( '@stdlib/math/base/special/floor' );

var x0 = new Float64Array( [ 2.0, 1.0, 2.0, -2.0, -2.0, 2.0, 3.0, 4.0 ] );
var x1 = new Float64Array( x0.buffer, x0.BYTES_PER_ELEMENT*1 ); // start at 2nd element

var N = floor( x0.length / 2 );

var v = gnansum( N, x1, 2 );
var v = gnansum( 4, x1, 2 );
// returns 5.0
```

#### gnansum.ndarray( N, x, stride, offset )
#### gnansum.ndarray( N, x, strideX, offsetX )

Computes the sum of strided array elements, ignoring `NaN` values and using alternative indexing semantics.

```javascript
var x = [ 1.0, -2.0, NaN, 2.0 ];
var N = x.length;

var v = gnansum.ndarray( N, x, 1, 0 );
var v = gnansum.ndarray( x.length, x, 1, 0 );
// returns 1.0
```

The function has the following additional parameters:

- **offset**: starting index for `x`.
- **offsetX**: starting index for `x`.

While [`typed array`][mdn-typed-array] views mandate a view offset based on the underlying `buffer`, the `offset` parameter supports indexing semantics based on a starting index. For example, to calculate the sum of every other value in `x` starting from the second value
While [`typed array`][mdn-typed-array] views mandate a view offset based on the underlying buffer, the offset parameter supports indexing semantics based on a starting index. For example, to calculate the sum of every other element starting from the second element:

```javascript
var floor = require( '@stdlib/math/base/special/floor' );

var x = [ 2.0, 1.0, 2.0, -2.0, -2.0, 2.0, 3.0, 4.0, NaN, NaN ];
var N = floor( x.length / 2 );

var v = gnansum.ndarray( N, x, 2, 1 );
var v = gnansum.ndarray( 5, x, 2, 1 );
// returns 5.0
```

Expand All @@ -133,22 +122,19 @@ var v = gnansum.ndarray( N, x, 2, 1 );
<!-- eslint no-undef: "error" -->

```javascript
var randu = require( '@stdlib/random/base/randu' );
var round = require( '@stdlib/math/base/special/round' );
var Float64Array = require( '@stdlib/array/float64' );
var discreteUniform = require( '@stdlib/random/base/discrete-uniform' );
var bernoulli = require( '@stdlib/random/base/bernoulli' );
var filledarrayBy = require( '@stdlib/array/filled-by' );
var gnansum = require( '@stdlib/blas/ext/base/gnansum' );

var x;
var i;

x = new Float64Array( 10 );
for ( i = 0; i < x.length; i++ ) {
if ( randu() < 0.2 ) {
x[ i ] = NaN;
} else {
x[ i ] = round( randu()*100.0 );
function rand() {
if ( bernoulli( 0.7 ) > 0 ) {
return discreteUniform( 0, 100 );
}
return NaN;
}

var x = filledarrayBy( 10, 'float64', rand );
console.log( x );

var v = gnansum( x.length, x, 1 );
Expand Down
Original file line number Diff line number Diff line change
Expand Up @@ -21,7 +21,9 @@
// MODULES //

var bench = require( '@stdlib/bench' );
var randu = require( '@stdlib/random/base/randu' );
var uniform = require( '@stdlib/random/base/uniform' );
var bernoulli = require( '@stdlib/random/base/bernoulli' );
var filledarrayBy = require( '@stdlib/array/filled-by' );
var isnan = require( '@stdlib/math/base/assert/is-nan' );
var pow = require( '@stdlib/math/base/special/pow' );
var pkg = require( './../package.json' ).name;
Expand All @@ -30,6 +32,19 @@ var gnansum = require( './../lib/main.js' );

// FUNCTIONS //

/**
* Returns a random number.
*
* @private
* @returns {number} random number
*/
function rand() {
if ( bernoulli( 0.8 ) > 0 ) {
return uniform( -10.0, 10.0 );
}
return NaN;
}

/**
* Creates a benchmark function.
*
Expand All @@ -38,17 +53,7 @@ var gnansum = require( './../lib/main.js' );
* @returns {Function} benchmark function
*/
function createBenchmark( len ) {
var x;
var i;

x = [];
for ( i = 0; i < len; i++ ) {
if ( randu() < 0.2 ) {
x.push( NaN );
} else {
x.push( ( randu()*10.0 ) - 20.0 );
}
}
var x = filledarrayBy( len, 'generic', rand );
return benchmark;

function benchmark( b ) {
Expand Down
Original file line number Diff line number Diff line change
Expand Up @@ -21,7 +21,9 @@
// MODULES //

var bench = require( '@stdlib/bench' );
var randu = require( '@stdlib/random/base/randu' );
var uniform = require( '@stdlib/random/base/uniform' );
var bernoulli = require( '@stdlib/random/base/bernoulli' );
var filledarrayBy = require( '@stdlib/array/filled-by' );
var isnan = require( '@stdlib/math/base/assert/is-nan' );
var pow = require( '@stdlib/math/base/special/pow' );
var pkg = require( './../package.json' ).name;
Expand All @@ -30,6 +32,19 @@ var gnansum = require( './../lib/ndarray.js' );

// FUNCTIONS //

/**
* Returns a random number.
*
* @private
* @returns {number} random number
*/
function rand() {
if ( bernoulli( 0.8 ) > 0 ) {
return uniform( -10.0, 10.0 );
}
return NaN;
}

/**
* Creates a benchmark function.
*
Expand All @@ -38,17 +53,7 @@ var gnansum = require( './../lib/ndarray.js' );
* @returns {Function} benchmark function
*/
function createBenchmark( len ) {
var x;
var i;

x = [];
for ( i = 0; i < len; i++ ) {
if ( randu() < 0.2 ) {
x.push( NaN );
} else {
x.push( ( randu()*10.0 ) - 20.0 );
}
}
var x = filledarrayBy( len, 'generic', rand );
return benchmark;

function benchmark( b ) {
Expand Down
34 changes: 15 additions & 19 deletions lib/node_modules/@stdlib/blas/ext/base/gnansum/docs/repl.txt
Original file line number Diff line number Diff line change
@@ -1,9 +1,9 @@

{{alias}}( N, x, stride )
{{alias}}( N, x, strideX )
Computes the sum of strided array elements, ignoring `NaN` values.

The `N` and `stride` parameters determine which elements in `x` are accessed
at runtime.
The `N` and stride parameters determine which elements in the strided array
are accessed at runtime.

Indexing is relative to the first index. To introduce an offset, use a typed
array view.
Expand All @@ -18,8 +18,8 @@
x: Array<number>|TypedArray
Input array.

stride: integer
Index increment.
strideX: integer
Stride length.

Returns
-------
Expand All @@ -33,27 +33,24 @@
> {{alias}}( x.length, x, 1 )
1.0

// Using `N` and `stride` parameters:
// Using `N` and stride parameters:
> x = [ -2.0, 1.0, 1.0, -5.0, 2.0, -1.0, NaN, NaN ];
> var N = {{alias:@stdlib/math/base/special/floor}}( x.length / 2 );
> var stride = 2;
> {{alias}}( N, x, stride )
> {{alias}}( 4, x, 2 )
1.0

// Using view offsets:
> var x0 = new {{alias:@stdlib/array/float64}}( [ 1.0, -2.0, 3.0, 2.0, 5.0, -1.0, NaN, NaN ] );
> var x1 = new {{alias:@stdlib/array/float64}}( x0.buffer, x0.BYTES_PER_ELEMENT*1 );
> N = {{alias:@stdlib/math/base/special/floor}}( x0.length / 2 );
> stride = 2;
> {{alias}}( N, x1, stride )
> {{alias}}( 4, x1, 2 )
-1.0

{{alias}}.ndarray( N, x, stride, offset )

{{alias}}.ndarray( N, x, strideX, offsetX )
Computes the sum of strided array elements, ignoring `NaN` values and using
alternative indexing semantics.

While typed array views mandate a view offset based on the underlying
buffer, the `offset` parameter supports indexing semantics based on a
buffer, the offset parameter supports indexing semantics based on a
starting index.

Parameters
Expand All @@ -64,10 +61,10 @@
x: Array<number>|TypedArray
Input array.

stride: integer
Index increment.
strideX: integer
Stride length.

offset: integer
offsetX: integer
Starting index.

Returns
Expand All @@ -84,8 +81,7 @@

// Using offset parameter:
> var x = [ 1.0, -2.0, 3.0, 2.0, 5.0, -1.0, NaN, NaN ];
> var N = {{alias:@stdlib/math/base/special/floor}}( x.length / 2 );
> {{alias}}.ndarray( N, x, 2, 1 )
> {{alias}}.ndarray( 4, x, 2, 1 )
-1.0

See Also
Expand Down
Original file line number Diff line number Diff line change
Expand Up @@ -31,7 +31,7 @@ interface Routine {
*
* @param N - number of indexed elements
* @param x - input array
* @param stride - stride length
* @param strideX - stride length
* @returns sum
*
* @example
Expand All @@ -40,15 +40,15 @@ interface Routine {
* var v = gnansum( x.length, x, 1 );
* // returns 1.0
*/
( N: number, x: NumericArray, stride: number ): number;
( N: number, x: NumericArray, strideX: number ): number;

/**
* Computes the sum of strided array elements, ignoring `NaN` values and using alternative indexing semantics.
*
* @param N - number of indexed elements
* @param x - input array
* @param stride - stride length
* @param offset - starting index
* @param strideX - stride length
* @param offsetX - starting index
* @returns sum
*
* @example
Expand All @@ -57,15 +57,15 @@ interface Routine {
* var v = gnansum.ndarray( x.length, x, 1, 0 );
* // returns 1.0
*/
ndarray( N: number, x: NumericArray, stride: number, offset: number ): number;
ndarray( N: number, x: NumericArray, strideX: number, offsetX: number ): number;
}

/**
* Computes the sum of strided array elements, ignoring `NaN` values.
*
* @param N - number of indexed elements
* @param x - input array
* @param stride - stride length
* @param strideX - stride length
* @returns sum
*
* @example
Expand Down
21 changes: 9 additions & 12 deletions lib/node_modules/@stdlib/blas/ext/base/gnansum/examples/index.js
Original file line number Diff line number Diff line change
Expand Up @@ -18,22 +18,19 @@

'use strict';

var randu = require( '@stdlib/random/base/randu' );
var round = require( '@stdlib/math/base/special/round' );
var Float64Array = require( '@stdlib/array/float64' );
var discreteUniform = require( '@stdlib/random/base/discrete-uniform' );
var bernoulli = require( '@stdlib/random/base/bernoulli' );
var filledarrayBy = require( '@stdlib/array/filled-by' );
var gnansum = require( './../lib' );

var x;
var i;

x = new Float64Array( 10 );
for ( i = 0; i < x.length; i++ ) {
if ( randu() < 0.2 ) {
x[ i ] = NaN;
} else {
x[ i ] = round( randu()*100.0 );
function rand() {
if ( bernoulli( 0.7 ) > 0 ) {
return discreteUniform( 0, 100 );
}
return NaN;
}

var x = filledarrayBy( 10, 'float64', rand );
console.log( x );

var v = gnansum( x.length, x, 1 );
Expand Down
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