lib/gaussian_cdf.c


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// Gaussian Cdf
//
// gaussian_cdf
//
// Gaussian cumulative distribution function
//
// F(x) = 0.5 * (1 + erf(x/√2))
//
// Inputs:    1
// Outputs:   1
// Constants: 0


#include <math.h>
#include "ts.h"


ts_parameter_t const ts_gaussian_cdf_p = { .n_inputs = 1, .n_outputs = 1, .n_constants = 0, .params_size = 0 };

uint_t ts_gaussian_cdf_offset( ts_constant_t const *c )
{
	( void )c;
	return ( 0 );
}

int ts_gaussian_cdf(
	fp_t * const *y, uint_t y_n,
	fp_t const * const *x, uint_t x_n,
	uint_t n, ts_constant_t const *c
)
{
	TS_PROLOGUE( ts_gaussian_cdf_p );
	(void)c;
    /* CDF = 0.5 * (1 + erf(x / sqrt(2))) */
    for (uint_t i = 0; i < n; ++i)
    {
        y[0][i] = 0.5 * (1.0 + erf(x[0][i] / sqrt(2.0)));
    }
	return 0;
}