Linspace

Generate a linearly spaced numeric array.

Usage

var linspace = require( '@stdlib/math/utils/linspace' );

linspace( start, stop[, length] )

Generates a linearly spaced numeric array. If a length is not provided, the default output array length is 100.

var arr = linspace( 0, 100, 6 );
// returns [ 0, 20, 40, 60, 80, 100 ]

Notes

  • The output array is guaranteed to include the start and stop values. Beware, however, that values between the start and stop are subject to floating-point errors. Hence,

    var arr = linspace( 0, 1, 3 );
    // returns [ 0, ~0.5, 1 ]
    

    where arr[1] is only guaranteed to be approximately equal to 0.5. If you desire more control over element precision, consider using roundn:

    var roundn = require( '@stdlib/math/base/special/roundn' );
    
    // Create an array subject to floating-point errors:
    var arr = linspace( 0, 1, 21 );
    
    // Round each value to the nearest hundredth:
    var out = new Array( arr.length );
    var i;
    for ( i = 0; i < arr.length; i++ ) {
        out[ i ] = roundn( arr[ i ], -2 );
    }
    
    console.log( out.join( '\n' ) );
    

Examples

var linspace = require( '@stdlib/math/utils/linspace' );
var out;

// Default behavior:
out = linspace( 0, 10 );
console.log( out.join( '\n' ) );

// Specify length:
out = linspace( 0, 10, 10 );
console.log( out.join( '\n' ) );

out = linspace( 0, 10, 11 );
console.log( out.join( '\n' ) );

// Create an array with decremented values:
out = linspace( 10, 0, 11 );
console.log( out.join( '\n' ) );