Package Exports
- @stdlib/math-base-special-fibonacci-indexf
- @stdlib/math-base-special-fibonacci-indexf/dist
- @stdlib/math-base-special-fibonacci-indexf/dist/index.js
- @stdlib/math-base-special-fibonacci-indexf/lib/index.js
This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (@stdlib/math-base-special-fibonacci-indexf) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.
Readme
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Fibonacci Number Index
Compute the Fibonacci number index of a single-precision floating-point number.
The Fibonacci number index is given by
where φ is the golden ratio and F > 1.
Installation
npm install @stdlib/math-base-special-fibonacci-indexfUsage
var fibonacciIndexf = require( '@stdlib/math-base-special-fibonacci-indexf' );fibonacciIndexf( F )
Computes the Fibonacci number index of a single-precision floating-point number.
var n = fibonacciIndexf( 2 );
// returns 3
n = fibonacciIndexf( 3 );
// returns 4
n = fibonacciIndexf( 5 );
// returns 5If provided either a non-integer or F_n <= 1, the function returns NaN.
var n = fibonacciIndexf( -1 );
// returns NaN
n = fibonacciIndexf( 3.14 );
// returns NaNIf provided NaN, the function returns NaN.
var n = fibonacciIndexf( NaN );
// returns NaNExamples
var fibonacciIndexf = require( '@stdlib/math-base-special-fibonacci-indexf' );
var F1;
var F2;
var FN;
var n;
var i;
F1 = 1;
F2 = 1;
for ( i = 3; i < 37; i++ ) {
FN = F1 + F2;
F1 = F2;
F2 = FN;
n = fibonacciIndexf( FN );
console.log( 'n(%d) = %d', FN, n );
}C APIs
Usage
#include "stdlib/math/base/special/fibonacci_indexf.h"stdlib_base_fibonacci_indexf( F )
Computes the Fibonacci number index of a single-precision floating-point number.
float out = stdlib_base_fibonacci_indexf( 2.0f );
// returns 3.0f
out = stdlib_base_fibonacci_indexf( 3.0f );
// returns 4.0fThe function accepts the following arguments:
- F:
[in] floatinput value.
float stdlib_base_fibonacci_indexf( const float F );Examples
#include "stdlib/math/base/special/fibonacci_indexf.h"
#include <stdio.h>
int main( void ) {
const float x[] = { 2.0f, 3.0f, 5.0f, 8.0f };
float y;
int i;
for ( i = 0; i < 4; i++ ) {
y = stdlib_base_fibonacci_indexf( x[ i ] );
printf( "fibonacci_indexf(%f) = %f\n", x[ i ], y );
}
}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.
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License
See LICENSE.
Copyright
Copyright © 2016-2026. The Stdlib Authors.