+ Press n or j to go to the next uncovered block, b, p or k for the previous block. +
+ +| 1 +2 +3 +4 +5 +6 +7 +8 +9 +10 +11 +12 +13 +14 +15 +16 +17 +18 +19 +20 +21 +22 +23 +24 +25 +26 +27 +28 +29 +30 +31 +32 +33 +34 +35 +36 +37 +38 +39 +40 +41 +42 +43 +44 +45 +46 +47 +48 +49 +50 +51 +52 +53 +54 +55 +56 +57 +58 +59 +60 +61 +62 +63 +64 +65 +66 +67 +68 +69 +70 +71 +72 +73 +74 +75 +76 +77 +78 +79 +80 +81 +82 +83 +84 +85 +86 +87 +88 | 2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +7x +7x +7x +7x +7x +7x +7x +7x +3x +3x +4x +7x + + +7x +2x +2x +2x +5x +5x +3x +3x +3x +5x +2x +2x +2x +2x +2x +7x +5x +5x +4x +4x +4x +5x +5x +2x +7x +2x +2x +2x +2x +2x + | /**
+* @license Apache-2.0
+*
+* Copyright (c) 2024 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 abs = require( '@stdlib/math/base/special/abs' );
+
+
+// MAIN //
+
+/**
+* Finds the index of the first element having the maximum absolute value.
+*
+* @param {PositiveInteger} N - number of indexed elements
+* @param {Float64Array} x - input array
+* @param {integer} strideX - `x` stride length
+* @returns {integer} index value
+*
+* @example
+* var Float64Array = require( '@stdlib/array/float64' );
+*
+* var x = new Float64Array( [ 1.0, 2.0, 3.0, 4.0, 5.0 ] );
+*
+* var idx = idamax( x.length, x, 1 );
+* // returns 4
+*/
+function idamax( N, x, strideX ) {
+ var dmax;
+ var idx;
+ var ix;
+ var v;
+ var i;
+
+ if ( N < 1 || strideX <= 0 ) {
+ return -1;
+ }
+ idx = 0;
+ if ( N === 1 ) {
+ return idx;
+ }
+ if (strideX === 1 ) {
+ // Code for stride equal to `1`...
+ dmax = abs( x[ 0 ] );
+ for ( i = 1; i < N; i++ ) {
+ v = abs( x[ i ] );
+ if ( v > dmax ) {
+ idx = i;
+ dmax = v;
+ }
+ }
+ return idx;
+ }
+ // Code for stride not equal to `1`...
+ dmax = abs( x[ 0 ] );
+ ix = strideX;
+ for ( i = 1; i < N; i++ ) {
+ v = abs( x[ ix ] );
+ if ( v > dmax ) {
+ idx = i;
+ dmax = v;
+ }
+ ix += strideX;
+ }
+ return idx;
+}
+
+
+// EXPORTS //
+
+module.exports = idamax;
+ |
+ Press n or j to go to the next uncovered block, b, p or k for the previous block. +
+ +| 1 +2 +3 +4 +5 +6 +7 +8 +9 +10 +11 +12 +13 +14 +15 +16 +17 +18 +19 +20 +21 +22 +23 +24 +25 +26 +27 +28 +29 +30 +31 +32 +33 +34 +35 +36 +37 +38 +39 +40 +41 +42 +43 +44 +45 +46 +47 +48 +49 +50 +51 +52 | 3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +15x +15x +15x +3x +3x +3x +3x +3x + | /**
+* @license Apache-2.0
+*
+* Copyright (c) 2024 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 addon = require( './../src/addon.node' );
+
+
+// MAIN //
+
+/**
+* Finds the index of the first element having the maximum absolute value.
+*
+* @param {PositiveInteger} N - number of indexed elements
+* @param {Float64Array} x - input array
+* @param {integer} strideX - `x` stride length
+* @returns {integer} index value
+*
+* @example
+* var Float64Array = require( '@stdlib/array/float64' );
+*
+* var x = new Float64Array( [ 4.0, 2.0, -3.0, 5.0, -1.0 ] );
+*
+* var idx = idamax( x.length, x, 1 );
+* // returns 3
+*/
+function idamax( N, x, strideX ) {
+ return addon( N, x, strideX );
+}
+
+
+// EXPORTS //
+
+module.exports = idamax;
+ |
+ Press n or j to go to the next uncovered block, b, p or k for the previous block. +
+ +| File | ++ | Statements | ++ | Branches | ++ | Functions | ++ | Lines | ++ |
|---|---|---|---|---|---|---|---|---|---|
| idamax.js | +
+
+ |
+ 97.7% | +85/87 | +92.3% | +12/13 | +100% | +1/1 | +97.7% | +85/87 | +
| idamax.native.js | +
+
+ |
+ 100% | +51/51 | +100% | +2/2 | +100% | +1/1 | +100% | +51/51 | +
| index.js | +
+
+ |
+ 100% | +68/68 | +100% | +3/3 | +100% | +0/0 | +100% | +68/68 | +
| main.js | +
+
+ |
+ 100% | +35/35 | +100% | +1/1 | +100% | +0/0 | +100% | +35/35 | +
| native.js | +
+
+ |
+ 100% | +35/35 | +100% | +1/1 | +100% | +0/0 | +100% | +35/35 | +
| ndarray.js | +
+
+ |
+ 97.33% | +73/75 | +90% | +9/10 | +100% | +1/1 | +97.33% | +73/75 | +
| ndarray.native.js | +
+
+ |
+ 100% | +57/57 | +100% | +2/2 | +100% | +1/1 | +100% | +57/57 | +
+ Press n or j to go to the next uncovered block, b, p or k for the previous block. +
+ +| 1 +2 +3 +4 +5 +6 +7 +8 +9 +10 +11 +12 +13 +14 +15 +16 +17 +18 +19 +20 +21 +22 +23 +24 +25 +26 +27 +28 +29 +30 +31 +32 +33 +34 +35 +36 +37 +38 +39 +40 +41 +42 +43 +44 +45 +46 +47 +48 +49 +50 +51 +52 +53 +54 +55 +56 +57 +58 +59 +60 +61 +62 +63 +64 +65 +66 +67 +68 +69 | 3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +1x +3x +2x +2x +3x +3x +3x +3x +3x +3x +3x + | /**
+* @license Apache-2.0
+*
+* Copyright (c) 2024 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';
+
+/**
+* BLAS level 1 routine to find the index of the first element having the maximum absolute value.
+*
+* @module @stdlib/blas/base/idamax
+*
+* @example
+* var Float64Array = require( '@stdlib/array/float64' );
+* var idamax = require( '@stdlib/blas/base/idamax' );
+*
+* var x = new Float64Array( [ -2.0, 1.0, 3.0, -5.0, 4.0, 0.0, -1.0, -3.0 ] );
+*
+* var idx = idamax( x.length, x, 1 );
+* // returns 3
+*
+* @example
+* var Float64Array = require( '@stdlib/array/float64' );
+* var idamax = require( '@stdlib/blas/base/idamax' );
+*
+* var x = new Float64Array( [ -2.0, 1.0, 3.0, -5.0, 4.0, 0.0, -1.0, -3.0 ] );
+*
+* var idx = idamax.ndarray( x.length, x, 1, 0 );
+* // returns 3
+*/
+
+// MODULES //
+
+var join = require( 'path' ).join;
+var tryRequire = require( '@stdlib/utils/try-require' );
+var isError = require( '@stdlib/assert/is-error' );
+var main = require( './main.js' );
+
+
+// MAIN //
+
+var idamax;
+var tmp = tryRequire( join( __dirname, './native.js' ) );
+if ( isError( tmp ) ) {
+ idamax = main;
+} else {
+ idamax = tmp;
+}
+
+
+// EXPORTS //
+
+module.exports = idamax;
+
+// exports: { "ndarray": "idamax.ndarray" }
+ |
+ Press n or j to go to the next uncovered block, b, p or k for the previous block. +
+ +| 1 +2 +3 +4 +5 +6 +7 +8 +9 +10 +11 +12 +13 +14 +15 +16 +17 +18 +19 +20 +21 +22 +23 +24 +25 +26 +27 +28 +29 +30 +31 +32 +33 +34 +35 +36 | 1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x + | /** +* @license Apache-2.0 +* +* Copyright (c) 2024 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 setReadOnly = require( '@stdlib/utils/define-nonenumerable-read-only-property' ); +var idamax = require( './idamax.js' ); +var ndarray = require( './ndarray.js' ); + + +// MAIN // + +setReadOnly( idamax, 'ndarray', ndarray ); + + +// EXPORTS // + +module.exports = idamax; + |
+ Press n or j to go to the next uncovered block, b, p or k for the previous block. +
+ +| 1 +2 +3 +4 +5 +6 +7 +8 +9 +10 +11 +12 +13 +14 +15 +16 +17 +18 +19 +20 +21 +22 +23 +24 +25 +26 +27 +28 +29 +30 +31 +32 +33 +34 +35 +36 | 1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x + | /** +* @license Apache-2.0 +* +* Copyright (c) 2024 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 setReadOnly = require( '@stdlib/utils/define-nonenumerable-read-only-property' ); +var idamax = require( './idamax.native.js' ); +var ndarray = require( './ndarray.native.js' ); + + +// MAIN // + +setReadOnly( idamax, 'ndarray', ndarray ); + + +// EXPORTS // + +module.exports = idamax; + |
+ Press n or j to go to the next uncovered block, b, p or k for the previous block. +
+ +| 1 +2 +3 +4 +5 +6 +7 +8 +9 +10 +11 +12 +13 +14 +15 +16 +17 +18 +19 +20 +21 +22 +23 +24 +25 +26 +27 +28 +29 +30 +31 +32 +33 +34 +35 +36 +37 +38 +39 +40 +41 +42 +43 +44 +45 +46 +47 +48 +49 +50 +51 +52 +53 +54 +55 +56 +57 +58 +59 +60 +61 +62 +63 +64 +65 +66 +67 +68 +69 +70 +71 +72 +73 +74 +75 +76 | 2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +8x +8x +8x +8x +8x +8x +8x +8x +3x +3x +5x +8x + + +5x +5x +8x +14x +14x +11x +11x +11x +14x +14x +5x +8x +2x +2x +2x +2x +2x + | /**
+* @license Apache-2.0
+*
+* Copyright (c) 2024 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 abs = require( '@stdlib/math/base/special/abs' );
+
+
+// MAIN //
+
+/**
+* Finds the index of the first element having the maximum absolute value.
+*
+* @param {PositiveInteger} N - number of indexed elements
+* @param {Float64Array} x - input array
+* @param {integer} strideX - `x` stride length
+* @param {NonNegativeInteger} offsetX - starting index for `x`
+* @returns {integer} index value
+*
+* @example
+* var Float64Array = require( '@stdlib/array/float64' );
+*
+* var x = new Float64Array( [ 1.0, 2.0, 3.0, 4.0, 5.0 ] );
+*
+* var idx = idamax( x.length, x, 1, 0 );
+* // returns 4
+*/
+function idamax( N, x, strideX, offsetX ) {
+ var dmax;
+ var idx;
+ var ix;
+ var v;
+ var i;
+
+ if ( N < 1 || strideX <= 0 ) {
+ return -1;
+ }
+ idx = 0;
+ if ( N === 1 ) {
+ return idx;
+ }
+ dmax = abs( x[ offsetX ] );
+ ix = offsetX + strideX;
+ for ( i = 1; i < N; i++ ) {
+ v = abs( x[ ix ] );
+ if ( v > dmax ) {
+ idx = i;
+ dmax = v;
+ }
+ ix += strideX;
+ }
+ return idx;
+}
+
+
+// EXPORTS //
+
+module.exports = idamax;
+ |
+ Press n or j to go to the next uncovered block, b, p or k for the previous block. +
+ +| 1 +2 +3 +4 +5 +6 +7 +8 +9 +10 +11 +12 +13 +14 +15 +16 +17 +18 +19 +20 +21 +22 +23 +24 +25 +26 +27 +28 +29 +30 +31 +32 +33 +34 +35 +36 +37 +38 +39 +40 +41 +42 +43 +44 +45 +46 +47 +48 +49 +50 +51 +52 +53 +54 +55 +56 +57 +58 | 2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +8x +8x +8x +8x +8x +8x +2x +2x +2x +2x +2x + | /**
+* @license Apache-2.0
+*
+* Copyright (c) 2024 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 minViewBufferIndex = require( '@stdlib/strided/base/min-view-buffer-index' );
+var offsetView = require( '@stdlib/strided/base/offset-view' );
+var addon = require( './idamax.native.js' );
+
+
+// MAIN //
+
+/**
+* Finds the index of the first element having the maximum absolute value.
+*
+* @param {integer} N - number of indexed elements
+* @param {Float64Array} x - input array
+* @param {integer} strideX - `x` stride length
+* @param {NonNegativeInteger} offsetX - starting index for `x`
+* @returns {integer} index value
+*
+* @example
+* var Float64Array = require( '@stdlib/array/float64' );
+*
+* var x = new Float64Array( [ 4.0, 2.0, -3.0, 5.0, -1.0 ] );
+*
+* var idx = idamax( x.length, x, 1, 0 );
+* // returns 3
+*/
+function idamax( N, x, strideX, offsetX ) {
+ var viewX;
+ offsetX = minViewBufferIndex( N, strideX, offsetX );
+ viewX = offsetView( x, offsetX );
+ return addon( N, viewX, strideX );
+}
+
+
+// EXPORTS //
+
+module.exports = idamax;
+ |