nansLike

Create an array filled with NaNs and having the same length and data type as a provided array.

Usage

var nansLike = require( '@stdlib/array/nans-like' );

nansLike( x[, dtype] )

Creates an array filled with NaNs and having the same length and data type as a provided array x.

var x = [ 1, 2, 3, 4, 5 ];

var arr = nansLike( x );
// returns [ NaN, NaN, NaN, NaN, NaN ]

The function supports 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
generic: generic JavaScript values

By default, the output array data type is inferred from the provided array x. To return an array having a different data type, provide a dtype argument.

var x = [ 0, 0 ];

var arr = nansLike( x, 'float32' );
// returns <Float32Array>[ NaN, NaN ]

Notes

If the output array has a complex number data type, each element of the returned array has a real component equal to NaN and an imaginary component equal to NaN.

Examples

var dtypes = require( '@stdlib/array/typed-float-dtypes' );
var zeros = require( '@stdlib/array/zeros' );
var nansLike = require( '@stdlib/array/nans-like' );

// Create a zero-filled array:
var x = zeros( 4, 'complex128' );

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

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