@stdlib/math-iter-special-ln
v0.2.2
Published
Create an iterator which evaluates the natural logarithm for each iterated value.
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iterLn
Create an iterator which iteratively evaluates the natural logarithm.
Installation
npm install @stdlib/math-iter-special-ln
Usage
var iterLn = require( '@stdlib/math-iter-special-ln' );
iterLn( iterator )
Returns an iterator which iteratively evaluates the natural logarithm.
var array2iterator = require( '@stdlib/array-to-iterator' );
var it = iterLn( array2iterator( [ 4.0, 0.0 ] ) );
// returns <Object>
var r = it.next().value;
// returns ~1.386
r = it.next().value;
// returns -Infinity
// ...
The returned iterator protocol-compliant object has the following properties:
- next: function which returns an iterator protocol-compliant object containing the next iterated value (if one exists) assigned to a
value
property and adone
property having aboolean
value indicating whether the iterator is finished. - return: function which closes an iterator and returns a single (optional) argument in an iterator protocol-compliant object.
Notes
- If an iterated value is non-numeric (including
NaN
), the returned iterator returnsNaN
. If non-numeric iterated values are possible, you are advised to provide aniterator
which type checks and handles non-numeric values accordingly. - If an environment supports
Symbol.iterator
and a provided iterator is iterable, the returned iterator is iterable.
Examples
var uniform = require( '@stdlib/random-iter-uniform' );
var iterLn = require( '@stdlib/math-iter-special-ln' );
// Create a seeded iterator for generating pseudorandom numbers:
var rand = uniform( 0.0, 100.0, {
'seed': 1234,
'iter': 10
});
// Create an iterator which consumes the pseudorandom number iterator:
var it = iterLn( rand );
// Perform manual iteration...
var r;
while ( true ) {
r = it.next();
if ( r.done ) {
break;
}
console.log( r.value );
}
See Also
@stdlib/math-base/special/ln
: evaluate the natural logarithm of a double-precision floating-point number.@stdlib/math-iter/special/exp
: create an iterator which evaluates the natural exponential function for each iterated value.@stdlib/math-iter/special/log10
: create an iterator which evaluates the common logarithm (logarithm with base 10) for each iterated value.@stdlib/math-iter/special/log1p
: create an iterator which evaluates the natural logarithm of 1+x for each iterated value.@stdlib/math-iter/special/log2
: create an iterator which evaluates the binary logarithm for each iterated value.
Notice
This package is part of stdlib, a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.
For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.
Community
License
See LICENSE.
Copyright
Copyright © 2016-2024. The Stdlib Authors.