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feat: add blas/base/icamax
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‎lib/node_modules/@stdlib/blas/base/icamax/benchmark/benchmark.js‎

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/**
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* @license Apache-2.0
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*
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* Copyright (c) 2025 The Stdlib Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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// MODULES //
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var bench = require( '@stdlib/bench' );
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var uniform = require( '@stdlib/random/array/uniform' );
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var isnan = require( '@stdlib/math/base/assert/is-nan' );
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var pow = require( '@stdlib/math/base/special/pow' );
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var Complex64Array = require( '@stdlib/array/complex64' );
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var pkg = require( './../package.json' ).name;
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var icamax = require( './../lib/icamax.js' );
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// VARIABLES //
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var options = {
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'dtype': 'float32'
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};
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// FUNCTIONS //
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/**
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* Create a benchmark function.
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*
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* @private
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* @param {PositiveInteger} len - array length
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* @returns {Function} benchmark function
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*/
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function createBenchmark( len ) {
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var cx;
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cx = new Complex64Array( uniform( len*2, -100.0, 100.0, options ) );
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return benchmark;
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/**
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* Benchmark function.
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*
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* @private
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* @param {Benchmark} b - benchmark instance
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*/
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function benchmark( b ) {
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var icx;
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var i;
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b.tic();
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for ( i = 0; i < b.iterations; i++ ) {
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icx = icamax( cx.length, cx, 1 );
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if ( isnan( icx ) ) {
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b.fail( 'should not return NaN' );
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}
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}
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b.toc();
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if ( isnan( icx ) ) {
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b.fail( 'should not return NaN' );
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}
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b.pass( 'benchmark finished' );
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b.end();
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}
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}
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// MAIN //
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/**
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* Main execution sequence.
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*
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* @private
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*/
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function main() {
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var len;
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var min;
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var max;
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var f;
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var i;
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min = 1; // 10^min
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max = 6; // 10^max
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for ( i = min; i <= max; i++ ) {
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len = pow( 10, i );
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f = createBenchmark( len );
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bench( pkg+':len='+len, f );
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}
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}
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main();

‎lib/node_modules/@stdlib/blas/base/icamax/benchmark/benchmark.ndarray.js‎

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/**
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* @license Apache-2.0
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*
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* Copyright (c) 2025 The Stdlib Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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// MODULES //
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var bench = require( '@stdlib/bench' );
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var uniform = require( '@stdlib/random/array/uniform' );
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var isnan = require( '@stdlib/math/base/assert/is-nan' );
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var pow = require( '@stdlib/math/base/special/pow' );
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var Complex64Array = require( '@stdlib/array/complex64' );
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var pkg = require( './../package.json' ).name;
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var icamax = require( './../lib/ndarray.js' );
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// VARIABLES //
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var options = {
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'dtype': 'float32'
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};
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// FUNCTIONS //
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/**
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* Create a benchmark function.
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*
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* @private
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* @param {PositiveInteger} len - array length
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* @returns {Function} benchmark function
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*/
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function createBenchmark( len ) {
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var cx;
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cx = new Complex64Array( uniform( len*2, -100.0, 100.0, options ) );
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return benchmark;
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/**
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* Benchmark function.
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*
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* @private
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* @param {Benchmark} b - benchmark instance
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*/
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function benchmark( b ) {
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var icx;
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var i;
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b.tic();
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for ( i = 0; i < b.iterations; i++ ) {
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icx = icamax( cx.length, cx, 1, 0 );
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if ( isnan( icx ) ) {
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b.fail( 'should not return NaN' );
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}
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}
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b.toc();
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if ( isnan( icx ) ) {
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b.fail( 'should not return NaN' );
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}
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b.pass( 'benchmark finished' );
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b.end();
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}
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}
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// MAIN //
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/**
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* Main execution sequence.
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*
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* @private
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*/
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function main() {
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var len;
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var min;
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var max;
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var f;
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var i;
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min = 1; // 10^min
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max = 6; // 10^max
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for ( i = min; i <= max; i++ ) {
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len = pow( 10, i );
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f = createBenchmark( len );
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bench( pkg+':ndarray:len='+len, f );
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}
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}
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main();

‎lib/node_modules/@stdlib/blas/base/icamax/lib/icamax.js‎

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/**
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* @license Apache-2.0
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*
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* Copyright (c) 2024 The Stdlib Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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// MODULES //
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var stride2offset = require( '@stdlib/strided/base/stride2offset' );
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var ndarray = require( './ndarray.js' );
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// MAIN //
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/**
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* Finds the index of the first element having maximum |Re(.)| + |Im(.)|
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*
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* @param {PositiveInteger} N - number of indexed elements
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* @param {Float64Array} x - input array
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* @param {integer} strideX - `x` stride length
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* @returns {integer} index value
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*
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* @example
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* var Complex64Array = require( '@stdlib/array/complex64' );
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*
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* var x = new Complex64Array( [ 1.0, 2.0, 3.0, 4.0, 5.0 ] );
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*
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* var icx = ixamax( x.length, x, 1 );
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* // returns 4
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*/
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function icamax( N, x, strideX ) {
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var ox = stride2offset( N, strideX );
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return ndarray( N, x, strideX, ox );
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}
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// EXPORTS //
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module.exports = icamax;

‎lib/node_modules/@stdlib/blas/base/icamax/lib/index.js‎

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/**
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* @license Apache-2.0
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*
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* Copyright (c) 2024 The Stdlib Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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/**
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* BLAS level 1 routine to find the index of the first element having maximum |Re(.)| + |Im(.)|
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*
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* @module @stdlib/blas/base/icamax
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*
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* @example
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* var Complex64Array = require( '@stdlib/array/complex64' );
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* var icamax = require( '@stdlib/blas/base/icamax' );
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*
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* var x = new Float64Array( [ -2.0, 1.0, 3.0, -5.0, 4.0, 0.0, -1.0, -3.0 ] );
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*
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* var icx = icamax( x.length, x, 1 );
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* // returns 3
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*
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* @example
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* var Complex64Array = require( '@stdlib/array/complex64' );
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* var icamax = require( '@stdlib/blas/base/icamax' );
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*
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* var x = new Complex64Array( [ -2.0, 1.0, 3.0, -5.0, 4.0, 0.0, -1.0, -3.0 ] );
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*
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* var icx = icamax.ndarray( x.length, x, 1, 0 );
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* // returns 3
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*/
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// MODULES //
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var join = require( 'path' ).join;
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var tryRequire = require( '@stdlib/utils/try-require' );
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var isError = require( '@stdlib/assert/is-error' );
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var main = require( './main.js' );
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// MAIN //
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var icamax;
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var tmp = tryRequire( join( __dirname, './native.js' ) );
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if ( isError( tmp ) ) {
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icamax = main;
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} else {
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icamax = tmp;
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}
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// EXPORTS //
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module.exports = icamax;
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// exports: { "ndarray": "icamax.ndarray" }

‎lib/node_modules/@stdlib/blas/base/icamax/lib/main.js‎

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/**
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* @license Apache-2.0
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*
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* Copyright (c) 2024 The Stdlib Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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// MODULES //
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var setReadOnly = require( '@stdlib/utils/define-nonenumerable-read-only-property' );
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var icamax = require( './idamax.js' );
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var ndarray = require( './ndarray.js' );
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// MAIN //
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setReadOnly( icamax, 'ndarray', ndarray );
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// EXPORTS //
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module.exports = icamax;

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