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stdlib-bot committed Nov 28, 2023
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9 changes: 9 additions & 0 deletions base/lib/index.js
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Expand Up @@ -585,6 +585,15 @@ setReadOnly( ns, 'map3d', require( './../../base/map3d' ) );
*/
setReadOnly( ns, 'map4d', require( './../../base/map4d' ) );

/**
* @name map5d
* @memberof ns
* @readonly
* @type {Function}
* @see {@link module:@stdlib/array/base/map5d}
*/
setReadOnly( ns, 'map5d', require( './../../base/map5d' ) );

/**
* @name mskbinary2d
* @memberof ns
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166 changes: 166 additions & 0 deletions base/map5d/README.md
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<!--
@license Apache-2.0
Copyright (c) 2023 The Stdlib Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->

# map5d

> Apply a function to elements in a five-dimensional nested input array and assign results to elements in a new five-dimensional nested output array.
<section class="intro">

</section>

<!-- /.intro -->

<section class="usage">

## Usage

```javascript
var map5d = require( '@stdlib/array/base/map5d' );
```

#### map5d( x, shape, fcn\[, thisArg] )

Applies a function to elements in a five-dimensional nested input array and assigns results to elements in a new five-dimensional nested output array.

```javascript
var naryFunction = require( '@stdlib/utils/nary-function' );
var abs = require( '@stdlib/math/base/special/abs' );

var x = [ [ [ [ [ -1.0, -2.0 ], [ -3.0, -4.0 ] ] ] ] ];
var shape = [ 1, 1, 1, 2, 2 ];

var y = map5d( x, shape, naryFunction( abs, 1 ) );
// returns [ [ [ [ [ 1.0, 2.0 ], [ 3.0, 4.0 ] ] ] ] ]
```

The function accepts the following arguments:

- **x**: input nested array.
- **shape**: array shape.
- **fcn**: function to apply.
- **thisArg**: applied function execution context (_optional_).

To set the applied function's execution context, provide a `thisArg`.

<!-- eslint-disable no-invalid-this -->

```javascript
function fcn( x ) {
this.count += 1;
return x;
}

var x = [ [ [ [ [ 1.0, 2.0 ], [ 3.0, 4.0 ] ] ] ] ];
var shape = [ 1, 1, 1, 2, 2 ];

var ctx = {
'count': 0
};

var y = map5d( x, shape, fcn, ctx );
// returns [ [ [ [ [ 1.0, 2.0 ], [ 3.0, 4.0 ] ] ] ] ]

var v = ctx.count;
// returns 4
```

#### map5d.assign( x, y, shape, fcn\[, thisArg] )

Applies a function to elements in a five-dimensional nested input array and assigns results to elements in a five-dimensional nested output array.

```javascript
var naryFunction = require( '@stdlib/utils/nary-function' );
var zeros5d = require( '@stdlib/array/base/zeros5d' );
var abs = require( '@stdlib/math/base/special/abs' );

var x = [ [ [ [ [ -1.0, -2.0 ], [ -3.0, -4.0 ] ] ] ] ];
var shape = [ 1, 1, 1, 2, 2 ];

var y = zeros5d( shape );

var out = map5d.assign( x, y, shape, naryFunction( abs, 1 ) );
// returns [ [ [ [ [ 1.0, 2.0 ], [ 3.0, 4.0 ] ] ] ] ]

var bool = ( out === y );
// returns true
```

The function accepts the following arguments:

- **x**: input nested array.
- **y**: output nested array.
- **shape**: array shape.
- **fcn**: function to apply.
- **thisArg**: applied function execution context (_optional_).

The function assumes that the input and output arrays have the same shape.

</section>

<!-- /.usage -->

<section class="notes">

</section>

<!-- /.notes -->

<section class="examples">

## Examples

<!-- eslint no-undef: "error" -->

```javascript
var discreteUniform = require( '@stdlib/random/base/discrete-uniform' ).factory;
var filled5dBy = require( '@stdlib/array/base/filled5d-by' );
var naryFunction = require( '@stdlib/utils/nary-function' );
var abs = require( '@stdlib/math/base/special/abs' );
var map5d = require( '@stdlib/array/base/map5d' );

var shape = [ 1, 1, 3, 3, 3 ];

var x = filled5dBy( shape, discreteUniform( -100, 100 ) );
console.log( x );

var y = map5d( x, shape, naryFunction( abs, 1 ) );
console.log( y );
```

</section>

<!-- /.examples -->

<!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->

<section class="related">

</section>

<!-- /.related -->

<!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->

<section class="links">

</section>

<!-- /.links -->
123 changes: 123 additions & 0 deletions base/map5d/benchmark/benchmark.assign.js
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/**
* @license Apache-2.0
*
* Copyright (c) 2023 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

'use strict';

// MODULES //

var bench = require( '@stdlib/bench' );
var uniform = require( '@stdlib/random/base/uniform' ).factory;
var isnan = require( '@stdlib/math/base/assert/is-nan' );
var pow = require( '@stdlib/math/base/special/pow' );
var floor = require( '@stdlib/math/base/special/floor' );
var identity = require( '@stdlib/math/base/special/identity' );
var filled5dBy = require( './../../../base/filled5d-by' );
var zeros5d = require( './../../../base/zeros5d' );
var numel = require( '@stdlib/ndarray/base/numel' );
var pkg = require( './../package.json' ).name;
var map5d = require( './../lib' ).assign;


// FUNCTIONS //

/**
* Creates a benchmark function.
*
* @private
* @param {PositiveIntegerArray} shape - array shape
* @returns {Function} benchmark function
*/
function createBenchmark( shape ) {
var x;
var y;

x = filled5dBy( shape, uniform( -100.0, 100.0 ) );
y = zeros5d( shape );

return benchmark;

/**
* Benchmark function.
*
* @private
* @param {Benchmark} b - benchmark instance
*/
function benchmark( b ) {
var out;
var i0;
var i1;
var i2;
var i3;
var i4;
var i;

b.tic();
for ( i = 0; i < b.iterations; i++ ) {
out = map5d( x, y, shape, identity );
i4 = i % shape[ 0 ];
i3 = i % shape[ 1 ];
i2 = i % shape[ 2 ];
i1 = i % shape[ 3 ];
i0 = i % shape[ 4 ];
if ( isnan( out[ i4 ][ i3 ][ i2 ][ i1 ][ i0 ] ) ) {
b.fail( 'should not return NaN' );
}
}
b.toc();

i4 = i % shape[ 0 ];
i3 = i % shape[ 1 ];
i2 = i % shape[ 2 ];
i1 = i % shape[ 3 ];
i0 = i % shape[ 4 ];
if ( isnan( out[ i4 ][ i3 ][ i2 ][ i1 ][ i0 ] ) ) {
b.fail( 'should not return NaN' );
}
b.pass( 'benchmark finished' );
b.end();
}
}


// MAIN //

/**
* Main execution sequence.
*
* @private
*/
function main() {
var min;
var max;
var sh;
var N;
var f;
var i;

min = 1; // 10^min
max = 6; // 10^max

for ( i = min; i <= max; i++ ) {
N = floor( pow( pow( 10, i ), 1.0/5.0 ) );
sh = [ N, N, N, N, N ];
f = createBenchmark( sh );
bench( pkg+'::equidimensional:assign:size='+numel( sh ), f );
}
}

main();
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