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Round each component of a double-precision complex floating-point number to the nearest multiple of
10^n
toward negative infinity.
To use in Observable,
cfloorn = require( 'https://cdn.jsdelivr.net/gh/stdlib-js/math-base-special-cfloorn@umd/browser.js' )
To vendor stdlib functionality and avoid installing dependency trees for Node.js, you can use the UMD server build:
var cfloorn = require( 'path/to/vendor/umd/math-base-special-cfloorn/index.js' )
To include the bundle in a webpage,
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/math-base-special-cfloorn@umd/browser.js"></script>
If no recognized module system is present, access bundle contents via the global scope:
<script type="text/javascript">
(function () {
window.cfloorn;
})();
</script>
Rounds each component of a double-precision complex floating-point number to the nearest multiple of 10^n
toward negative infinity.
var Complex128 = require( '@stdlib/complex-float64-ctor' );
var real = require( '@stdlib/complex-float64-real' );
var imag = require( '@stdlib/complex-float64-imag' );
// Round components to 2 decimal places:
var v = cfloorn( new Complex128( -3.141592653589793, 3.141592653589793 ), -2 );
// returns <Complex128>
var re = real( v );
// returns -3.15
var im = imag( v );
// returns 3.14
// If n = 0, `cfloorn` behaves like `cfloor`:
v = cfloorn( new Complex128( -3.141592653589793, 3.141592653589793 ), 0 );
// returns <Complex128>
re = real( v );
// returns -4.0
im = imag( v );
// returns 3.0
// Round components to the nearest thousand:
v = cfloorn( new Complex128( -12368.0, 12368.0 ), 3 );
// returns <Complex128>
re = real( v );
// returns -13000.0
im = imag( v );
// returns 12000.0
v = cfloorn( new Complex128( NaN, NaN ), 0 );
// returns <Complex128>
re = real( v );
// returns NaN
im = imag( v );
// returns NaN
-
When operating on floating-point numbers in bases other than
2
, rounding to specified digits can be inexact. For example,var Complex128 = require( '@stdlib/complex-float64-ctor' ); var real = require( '@stdlib/complex-float64-real' ); var imag = require( '@stdlib/complex-float64-imag' ); var x = -0.2 - 0.1; // returns -0.30000000000000004 // Should round components to 0.3: var v = cfloorn( new Complex128( x, x ), -16 ); // returns <Complex128> var re = real( v ); // returns -0.3000000000000001 var im = imag( v ); // returns -0.3000000000000001
<!DOCTYPE html>
<html lang="en">
<body>
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/complex-float64-ctor@umd/browser.js"></script>
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/random-base-randu@umd/browser.js"></script>
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/random-base-uniform@umd/browser.js"></script>
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/math-base-special-floor@umd/browser.js"></script>
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/math-base-special-cfloorn@umd/browser.js"></script>
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/random-base-discrete-uniform@umd/browser.js"></script>
<script type="text/javascript">
(function () {
var z;
var w;
var n;
var i;
for ( i = 0; i < 100; i++ ) {
z = new Complex128( uniform( -50.0, 50.0 ), uniform( -50.0, 50.0 ) );
n = randint( -5.0, 0.0 );
w = cfloorn( z, n );
console.log( 'floorn(%s,%s) = %s', z.toString(), n.toString(), w.toString() );
}
})();
</script>
</body>
</html>
@stdlib/math-base/special/cceiln
: round each component of a double-precision complex floating-point number to the nearest multiple of 10^n toward positive infinity.@stdlib/math-base/special/cfloor
: round a double-precision complex floating-point number toward negative infinity.@stdlib/math-base/special/croundn
: round each component of a double-precision complex floating-point number to the nearest multiple of 10^n.
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For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.
See LICENSE.
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