sdot
Calculate the dot product of two single-precision floating-point vectors.
The dot product (or scalar product) is defined as
Usage
var sdot = require( '@stdlib/blas/sdot' );
sdot( x, y )
Calculates the dot product of vectors x
and y
.
var Float32Array = require( '@stdlib/array/float32' );
var array = require( '@stdlib/ndarray/array' );
var x = array( new Float32Array( [ 4.0, 2.0, -3.0, 5.0, -1.0 ] ) );
var y = array( new Float32Array( [ 2.0, 6.0, -1.0, -4.0, 8.0 ] ) );
var z = sdot( x, y );
// returns -5.0
The function has the following parameters:
- x: a 1-dimensional
ndarray
whose underlying data type isfloat32
. - y: a 1-dimensional
ndarray
whose underlying data type isfloat32
.
If provided empty vectors, the function returns 0.0
.
var Float32Array = require( '@stdlib/array/float32' );
var array = require( '@stdlib/ndarray/array' );
var x = array( new Float32Array() );
var y = array( new Float32Array() );
var z = sdot( x, y );
// returns 0.0
Notes
Examples
var discreteUniform = require( '@stdlib/random/base/discrete-uniform' );
var Float32Array = require( '@stdlib/array/float32' );
var array = require( '@stdlib/ndarray/array' );
var sdot = require( '@stdlib/blas/sdot' );
var x = array( new Float32Array( 10 ) );
var y = array( new Float32Array( 10 ) );
var rand1 = discreteUniform.factory( 0, 100 );
var rand2 = discreteUniform.factory( 0, 10 );
var i;
for ( i = 0; i < x.length; i++ ) {
x.set( i, rand1() );
y.set( i, rand2() );
}
console.log( x.toString() );
console.log( y.toString() );
var z = sdot( x, y );
console.log( z );