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Fill a single-precision floating-point strided array with a specified scalar constant.
To use in Observable,
sfill = require( 'https://cdn.jsdelivr.net/gh/stdlib-js/blas-ext-base-sfill@umd/browser.js' )To vendor stdlib functionality and avoid installing dependency trees for Node.js, you can use the UMD server build:
var sfill = require( 'path/to/vendor/umd/blas-ext-base-sfill/index.js' )To include the bundle in a webpage,
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/blas-ext-base-sfill@umd/browser.js"></script>If no recognized module system is present, access bundle contents via the global scope:
<script type="text/javascript">
(function () {
window.sfill;
})();
</script>Fills a single-precision floating-point strided array x with a specified scalar constant alpha.
var Float32Array = require( '@stdlib/array-float32' );
var x = new Float32Array( [ -2.0, 1.0, 3.0, -5.0, 4.0, 0.0, -1.0, -3.0 ] );
sfill( x.length, 5.0, x, 1 );
// x => <Float32Array>[ 5.0, 5.0, 5.0, 5.0, 5.0, 5.0, 5.0, 5.0 ]The function has the following parameters:
- N: number of indexed elements.
- alpha: scalar constant.
- x: input
Float32Array. - strideX: index increment.
The N and stride parameters determine which elements in the strided array are accessed at runtime. For example, to fill every other element
var Float32Array = require( '@stdlib/array-float32' );
var x = new Float32Array( [ -2.0, 1.0, 3.0, -5.0, 4.0, 0.0, -1.0, -3.0 ] );
sfill( 4, 5.0, x, 2 );
// x => <Float32Array>[ 5.0, 1.0, 5.0, -5.0, 5.0, 0.0, 5.0, -3.0 ]Note that indexing is relative to the first index. To introduce an offset, use typed array views.
var Float32Array = require( '@stdlib/array-float32' );
// Initial array...
var x0 = new Float32Array( [ 1.0, -2.0, 3.0, -4.0, 5.0, -6.0 ] );
// Create an offset view...
var x1 = new Float32Array( x0.buffer, x0.BYTES_PER_ELEMENT*1 ); // start at 2nd element
// Fill every other element...
sfill( 3, 5.0, x1, 2 );
// x0 => <Float32Array>[ 1.0, 5.0, 3.0, 5.0, 5.0, 5.0 ]Fills a single-precision floating-point strided array x with a specified scalar constant alpha using alternative indexing semantics.
var Float32Array = require( '@stdlib/array-float32' );
var x = new Float32Array( [ -2.0, 1.0, 3.0, -5.0, 4.0, 0.0, -1.0, -3.0 ] );
sfill.ndarray( x.length, 5.0, x, 1, 0 );
// x => <Float32Array>[ 5.0, 5.0, 5.0, 5.0, 5.0, 5.0, 5.0, 5.0 ]The function has the following additional parameters:
- offsetX: starting index.
While typed array views mandate a view offset based on the underlying buffer, the offset parameter supports indexing semantics based on a starting index. For example, to access only the last three elements of the strided array
var Float32Array = require( '@stdlib/array-float32' );
var x = new Float32Array( [ 1.0, -2.0, 3.0, -4.0, 5.0, -6.0 ] );
sfill.ndarray( 3, 5.0, x, 1, x.length-3 );
// x => <Float32Array>[ 1.0, -2.0, 3.0, 5.0, 5.0, 5.0 ]- If
N <= 0, both functions return the strided array unchanged.
<!DOCTYPE html>
<html lang="en">
<body>
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/random-array-discrete-uniform@umd/browser.js"></script>
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/blas-ext-base-sfill@umd/browser.js"></script>
<script type="text/javascript">
(function () {
var x = discreteUniform( 10, -100, 100, {
'dtype': 'float32'
});
console.log( x );
sfill( x.length, 5.0, x, 1 );
console.log( x );
})();
</script>
</body>
</html>@stdlib/blas-ext/base/dfill: fill a double-precision floating-point strided array with a specified scalar constant.@stdlib/blas-ext/base/gfill: fill a strided array with a specified scalar constant.
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For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.
See LICENSE.
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