Incrspace

Generate a linearly spaced numeric array using a provided increment.

Usage

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

incrspace( start, stop[, increment] )

Generates a linearly spaced numeric array. If an increment is not provided, the default increment is 1.

var arr = incrspace( 0, 11, 2 );
// returns [ 0, 2, 4, 6, 8, 10 ]

Notes

The output array is guaranteed to include the start value but does not include the stop value. Beware that values subsequent to the start value are subject to floating-point errors. Hence,

var arr = incrspace( 0.1, 0.5, 0.2 );
// returns [ 0.1, ~0.3 ]

where arr[1] is only guaranteed to be approximately equal to 0.3.

If you desire more control over element precision, consider using roundn:

var roundn = require( '@stdlib/math/base/special/roundn' );
var arr;
var out;
var i;

// Create an array subject to floating-point errors:
arr = incrspace( 0, 1.01, 0.02 );

// Round each value to the nearest hundredth:
out = [];
for ( i = 0; i < arr.length; i++ ) {
    out.push( roundn( arr[ i ], -2 ) );
}

console.log( out.join( '\n' ) );

Examples

var incrspace = require( '@stdlib/array/incrspace' );
var out;

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

// Specify increment:
console.log( '\nIncrement 2:' );
out = incrspace( 0, 10, 2 );
console.log( out.join( '\n' ) );

console.log( '\nIncrement 2:' );
out = incrspace( 0, 11, 2 );
console.log( out.join( '\n' ) );

console.log( '\nIncrement 0.02:' );
out = incrspace( 0, 1.01, 0.02 );
console.log( out.join( '\n' ) );

// Create an array using a negative increment:
console.log( '\nDecremented values:' );
out = incrspace( 10, 0, -2 );
console.log( out.join( '\n' ) );