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 89 90 91 92 93 94 95 96 97 98 99 100 101 102 | 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 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 60x 60x 60x 60x 60x 60x 13x 13x 47x 60x 13x 13x 34x 60x 13x 60x 10x 21x 3x 11x 3x 8x 5x 5x 34x 60x 20x 20x 14x 60x 7x 7x 7x 7x 7x 7x 14x 14x 60x 2x 2x 2x 2x 2x | /**
* @license Apache-2.0
*
* Copyright (c) 2025 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 isLayout = require( '@stdlib/blas/base/assert/is-layout' );
var isRowMajor = require( '@stdlib/ndarray/base/assert/is-row-major-string' );
var isColumnMajor = require( '@stdlib/ndarray/base/assert/is-column-major-string' );
var max = require( '@stdlib/math/base/special/max' );
var format = require( '@stdlib/string/format' );
var base = require( './base.js' );
// MAIN //
/**
* Multiplies a real M by N matrix `A` by a real scalar `CTO/CFROM`.
*
* @param {string} order - storage layout
* @param {string} type - specifies the type of matrix `A`
* @param {NonNegativeInteger} KL - lower band width of `A`. Referenced only if type is `symmetric-banded-lower` or `banded`.
* @param {NonNegativeInteger} KU - upper band width of `A`. Referenced only if type is `symmetric-banded-upper` or `banded`.
* @param {number} CFROM - the matrix `A` is multiplied by `CTO / CFROM`
* @param {number} CTO - the matrix `A` is multiplied by `CTO / CFROM`
* @param {NonNegativeInteger} M - number of rows in matrix `A`
* @param {NonNegativeInteger} N - number of columns in matrix `A`
* @param {Float64Array} A - input matrix
* @param {PositiveInteger} LDA - stride of the first dimension of `A` (a.k.a., leading dimension of the matrix `A`)
* @throws {TypeError} first argument must be a valid order
* @throws {RangeError} fourth argument must be greater than or equal to max(1,N)
* @returns {Float64Array} scaled matrix `A`
*
* @example
* var Float64Array = require( '@stdlib/array/float64' );
*
* var A = new Float64Array( [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 ] ); // => [ [ 1.0, 2.0 ], [ 3.0, 4.0 ], [ 5.0, 6.0 ] ]
*
* dlascl( 'row-major', 'general', 0, 0, 1.0, 2.0, 3, 2, A, 2 );
* // A => <Float64Array>[ 2.0, 4.0, 6.0, 8.0, 10.0, 12.0 ]
*/
function dlascl( order, type, KL, KU, CFROM, CTO, M, N, A, LDA ) {
var sa1;
var sa2;
var s;
if ( !isLayout( order ) ) {
throw new TypeError( format( 'invalid argument. First argument must be a valid order. Value: `%s`.', order ) );
}
if ( type !== 'general' && type !== 'upper' && type !== 'lower' && type !== 'upper-hessenberg' && type !== 'symmetric-banded-lower' && type !== 'symmetric-banded-upper' && type !== 'banded' ) {
throw new TypeError( format( 'invalid argument. First argument must be a valid matrix type. Value: `%s`.', type ) );
}
if ( isRowMajor( order ) ) {
s = N;
} else if ( type === 'general' || type === 'upper' || type === 'lower' || type === 'upper-hessenberg' ) {
s = M;
} else if ( type === 'symmetric-banded-lower' ) {
s = KL + 1;
} else if ( type === 'symmetric-banded-upper' ) {
s = KU + 1;
} else {
s = (2*KL) + KU + 1;
}
if ( LDA < max( 1, s ) ) {
throw new RangeError( format( 'invalid argument. Tenth argument must be greater than or equal to max(1,%d). Value: `%d`.', s, LDA ) );
}
if ( isColumnMajor( order ) ) {
sa1 = 1;
sa2 = LDA;
} else { // order === 'row-major'
sa1 = LDA;
sa2 = 1;
}
return base( type, KL, KU, CFROM, CTO, M, N, A, sa1, sa2, 0 );
}
// EXPORTS //
module.exports = dlascl;
|