Floor
Round a double-precision complex floating-point number toward negative infinity.
Usage
var cfloor = require( '@stdlib/math/base/special/cfloor' );
cfloor( z )
Rounds a double-precision complex floating-point number toward negative infinity.
var Complex128 = require( '@stdlib/complex/float64/ctor' );
var real = require( '@stdlib/complex/float64/real' );
var imag = require( '@stdlib/complex/float64/imag' );
var v = cfloor( new Complex128( -4.2, 5.5 ) );
// returns <Complex128>
var re = real( v );
// returns -5.0
var im = imag( v );
// returns 5.0
v = cfloor( new Complex128( 9.99999, 0.1 ) );
// returns <Complex128>
re = real( v );
// returns 9.0
im = imag( v );
// returns 0.0
v = cfloor( new Complex128( 0.0, 0.0 ) );
// returns <Complex128>
re = real( v );
// returns 0.0
im = imag( v );
// returns 0.0
v = cfloor( new Complex128( NaN, NaN ) );
// returns <Complex128>
re = real( v );
// returns NaN
im = imag( v );
// returns NaN
Examples
var Complex128 = require( '@stdlib/complex/float64/ctor' );
var randu = require( '@stdlib/random/base/randu' );
var cfloor = require( '@stdlib/math/base/special/cfloor' );
var re;
var im;
var z;
var w;
var i;
for ( i = 0; i < 100; i++ ) {
re = ( randu()*100.0 ) - 50.0;
im = ( randu()*100.0 ) - 50.0;
z = new Complex128( re, im );
w = cfloor( z );
console.log( 'floor(%s) = %s', z.toString(), w.toString() );
}
C APIs
Usage
#include "stdlib/math/base/special/cfloor.h"
stdlib_base_cfloor( z )
Rounds a double-precision complex floating-point number toward negative infinity.
#include "stdlib/complex/float64/ctor.h"
#include "stdlib/complex/float64/real.h"
#include "stdlib/complex/float64/imag.h"
stdlib_complex128_t z = stdlib_complex128( 2.5, -1.5 );
stdlib_complex128_t out = stdlib_base_cfloor( z );
double re = stdlib_complex128_real( out );
// returns 2.0
double im = stdlib_complex128_imag( out );
// returns -2.0
The function accepts the following arguments:
- z:
[in] stdlib_complex128_t
input value.
stdlib_complex128_t stdlib_base_cfloor( const stdlib_complex128_t z );
Examples
#include "stdlib/math/base/special/cfloor.h"
#include "stdlib/complex/float64/ctor.h"
#include "stdlib/complex/float64/reim.h"
#include <stdio.h>
int main( void ) {
const stdlib_complex128_t x[] = {
stdlib_complex128( 3.14, 1.5 ),
stdlib_complex128( -3.14, -1.5 ),
stdlib_complex128( 0.0, 0.0 ),
stdlib_complex128( 0.0/0.0, 0.0/0.0 )
};
stdlib_complex128_t v;
stdlib_complex128_t y;
double re1;
double im1;
double re2;
double im2;
int i;
for ( i = 0; i < 4; i++ ) {
v = x[ i ];
y = stdlib_base_cfloor( v );
stdlib_complex128_reim( v, &re1, &im1 );
stdlib_complex128_reim( y, &re2, &im2 );
printf( "cfloor(%lf + %lfi) = %lf + %lfi\n", re1, im1, re2, im2 );
}
}