ones

Create an array filled with ones and having a specified length.

Usage

var ones = require( '@stdlib/array/ones' );

ones( length[, dtype] )

Creates an array filled with ones and having a specified length.

var arr = ones( 2 );
// returns <Float64Array>[ 1.0, 1.0 ]

The function recognizes the following data types:

• float64: double-precision floating-point numbers (IEEE 754)
• float32: single-precision floating-point numbers (IEEE 754)
• complex128: double-precision complex floating-point numbers
• complex64: single-precision complex floating-point numbers
• int32: 32-bit two's complement signed integers
• uint32: 32-bit unsigned integers
• int16: 16-bit two's complement signed integers
• uint16: 16-bit unsigned integers
• int8: 8-bit two's complement signed integers
• uint8: 8-bit unsigned integers
• uint8c: 8-bit unsigned integers clamped to 0-255
• generic: generic JavaScript values

By default, the output array data type is float64 (i.e., a typed array). To specify an alternative data type, provide a dtype argument.

var arr = ones( 2, 'int32' );
// returns <Int32Array>[ 1, 1 ]

Notes

• For complex number arrays, each entry of the returned array has a real component equal to 1 and an imaginary component equal to 0.

Examples

var dtypes = require( '@stdlib/array/dtypes' );
var ones = require( '@stdlib/array/ones' );

// Get a list of array data types:
var dt = dtypes();

// Generate filled arrays...
var arr;
var i;
for ( i = 0; i < dt.length; i++ ) {
    arr = ones( 4, dt[ i ] );
    console.log( arr );
}

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See Also

• @stdlib/array/full: create a filled array having a specified length.
• @stdlib/array/nans: create an array filled with NaNs and having a specified length.
• @stdlib/array/ones-like: create an array filled with ones and having the same length and data type as a provided array.
• @stdlib/array/zeros: create a zero-filled array having a specified length.