incrspace

Generate a linearly spaced numeric array according to a provided increment.

Usage

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

incrspace( start, stop, increment )

Generates a linearly spaced numeric array according to a provided increment.

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' );

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

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

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

Examples

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

var out = incrspace( 0, 10, 2 );
console.log( out.join( '\n' ) );

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

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

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