lib/laplace_cdf.c


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// Laplace Cdf
//
// laplace_cdf
//
// Laplace cumulative distribution
//
// F(x) = 0.5 + 0.5*sign(x)*(1-e^(-|x|))
//
// Inputs:    1
// Outputs:   1
// Constants: 0


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


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

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

int ts_laplace_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_laplace_cdf_p );
	(void)c;
	for( uint_t i = 0; i < n; ++i )
	{
		fp_t xi = x[0][i];
		y[0][i] = xi < 0 ? 0.5 * exp( xi ) : 1.0 - 0.5 * exp( -xi );
	}
	return 0;
}