README.md

Floor

Round a single-precision complex floating-point number toward negative infinity.

Usage

var cfloorf = require( '@stdlib/math/base/special/cfloorf' );

cfloorf( z )

Rounds a single-precision complex floating-point number toward negative infinity.

var Complex64 = require( '@stdlib/complex/float32/ctor' );
var real = require( '@stdlib/complex/float32/real' );
var imag = require( '@stdlib/complex/float32/imag' );

var v = cfloorf( new Complex64( -4.2, 5.5 ) );
// returns <Complex64>

var re = real( v );
// returns -5.0

var im = imag( v );
// returns 5.0

v = cfloorf( new Complex64( 9.99999, 0.1 ) );
// returns <Complex64>

re = real( v );
// returns 9.0

im = imag( v );
// returns 0.0

v = cfloorf( new Complex64( 0.0, 0.0 ) );
// returns <Complex64>

re = real( v );
// returns 0.0

im = imag( v );
// returns 0.0

v = cfloorf( new Complex64( NaN, NaN ) );
// returns <Complex64>

re = real( v );
// returns NaN

im = imag( v );
// returns NaN

Examples

var Complex64 = require( '@stdlib/complex/float32/ctor' );
var randu = require( '@stdlib/random/base/randu' );
var cfloorf = require( '@stdlib/math/base/special/cfloorf' );

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 Complex64( re, im );
    w = cfloorf( z );
    console.log( 'cfloorf(%s) = %s', z.toString(), w.toString() );
}

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C APIs

Usage

#include "stdlib/math/base/special/cfloorf.h"

stdlib_base_cfloorf( z )

Rounds a single-precision complex floating-point number toward negative infinity.

#include "stdlib/complex/float32/ctor.h"
#include "stdlib/complex/float32/real.h"
#include "stdlib/complex/float32/imag.h"

stdlib_complex64_t z = stdlib_complex64( 2.5f, -1.5f );

stdlib_complex64_t out = stdlib_base_cfloorf( z );

float re = stdlib_complex64_real( out );
// returns 2.0f

float im = stdlib_complex64_imag( out );
// returns -2.0f

The function accepts the following arguments:

• z: [in] stdlib_complex64_t input value.

stdlib_complex64_t stdlib_base_cfloorf( const stdlib_complex64_t z );

Examples

#include "stdlib/math/base/special/cfloorf.h"
#include "stdlib/complex/float32/ctor.h"
#include "stdlib/complex/float32/reim.h"
#include <stdio.h>

int main( void ) {
    const stdlib_complex64_t x[] = {
        stdlib_complex128( 3.14f, 1.5f ),
        stdlib_complex128( -3.14f, -1.5f ),
        stdlib_complex128( 0.0f, 0.0f ),
        stdlib_complex128( 0.0f/0.0f, 0.0f/0.0f )
    };

    stdlib_complex64_t v;
    stdlib_complex64_t y;
    float re1;
    float im1;
    float re2;
    float im2;
    int i;
    for ( i = 0; i < 4; i++ ) {
        v = x[ i ];
        y = stdlib_base_cfloorf( v );
        stdlib_complex64_reim( v, &re1, &im1 );
        stdlib_complex64_reim( y, &re2, &im2 );
        printf( "cfloorf(%f + %fi) = %f + %fi\n", re1, im1, re2, im2 );
    }
}