#ifndef GSL_STATISTICS_CHAR_H
#define GSL_STATISTICS_CHAR_H

#include <stddef.h>

double gsl_stats_char_mean (const char data[], size_t n);
double gsl_stats_char_variance (const char data[], size_t n);
double gsl_stats_char_sd (const char data[], size_t n);
double gsl_stats_char_est_variance (const char data[], size_t n);
double gsl_stats_char_est_sd (const char data[], size_t n);
double gsl_stats_char_absdev (const char data[], size_t n);

double gsl_stats_char_skew (const char data[], size_t n);
double gsl_stats_char_kurtosis (const char data[], size_t n);
double gsl_stats_char_lag1_autocorrelation (const char data[], size_t n);

double gsl_stats_char_variance_with_mean (const char data[], size_t n, 
					 double mean);
double gsl_stats_char_sd_with_mean (const char data[], size_t n, double mean);
double gsl_stats_char_est_variance_with_mean (const char data[], size_t n,
					     double mean);
double gsl_stats_char_est_sd_with_mean (const char data[], size_t n, double mean);
double gsl_stats_char_absdev_with_mean (const char data[], size_t n, double mean);
double gsl_stats_char_skew_with_mean_and_sd (const char data[], size_t n, 
					    double mean, double sd);
double gsl_stats_char_kurtosis_with_mean_and_sd (const char data[], size_t n,
						double mean,  double sd);
double gsl_stats_char_lag1_autocorrelation_with_mean (const char data[], 
						     size_t n, double mean);

double gsl_stats_char_pvariance (const char data1[], const char data2[],
				size_t n1, size_t n2);
double gsl_stats_char_ttest (const char data1[], const char data2[],
			    size_t n1, size_t n2);

char gsl_stats_char_max (const char data[], size_t n);
char gsl_stats_char_min (const char data[], size_t n);

size_t gsl_stats_char_max_index (const char data[], size_t n);
size_t gsl_stats_char_min_index (const char data[], size_t n);

void gsl_stats_char_sort_data (char data[], size_t n) ;

double gsl_stats_char_median_from_sorted_data (const char sorted_data[],
					      size_t n) ;
double gsl_stats_char_quantile_from_sorted_data (const char sorted_data[],
						  size_t n, const double f) ;

#endif /* GSL_STATISTICS_CHAR_H */