README.md

dapxsum

Add a scalar constant to each element of a one-dimensional double-precision floating-point ndarray and compute the sum.

Usage

var dapxsum = require( '@stdlib/blas/ext/base/ndarray/dapxsum' );

dapxsum( arrays )

Adds a scalar constant to each element of a one-dimensional double-precision floating-point ndarray and computes the sum.

var Float64Array = require( '@stdlib/array/float64' );
var ndarray = require( '@stdlib/ndarray/base/ctor' );
var scalar2ndarray = require( '@stdlib/ndarray/from-scalar' );

var xbuf = new Float64Array( [ 1.0, -2.0, 2.0 ] );
var x = new ndarray( 'float64', xbuf, [ 3 ], [ 1 ], 0, 'row-major' );
var alpha = scalar2ndarray( 5.0, {
    'dtype': 'float64'
});

var v = dapxsum( [ x, alpha ] );
// returns 16.0

The function has the following parameters:

• arrays: array-like object containing a one-dimensional input ndarray and a zero-dimensional ndarray containing a scalar constant.

Examples

var discreteUniform = require( '@stdlib/random/array/discrete-uniform' );
var ndarray = require( '@stdlib/ndarray/base/ctor' );
var scalar2ndarray = require( '@stdlib/ndarray/from-scalar' );
var ndarray2array = require( '@stdlib/ndarray/to-array' );
var dapxsum = require( '@stdlib/blas/ext/base/ndarray/dapxsum' );

var xbuf = discreteUniform( 10, -100, 100, {
    'dtype': 'float64'
});
var x = new ndarray( 'float64', xbuf, [ xbuf.length ], [ 1 ], 0, 'row-major' );
console.log( ndarray2array( x ) );

var alpha = scalar2ndarray( 5.0, {
    'dtype': 'float64'
});

var v = dapxsum( [ x, alpha ] );
console.log( v );