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#ifdef Datadir
#define DATADIR Datadir
#else
#define DATADIR "."
#endif
#include <apop.h>
int main(){
apop_table_exists( DATADIR "/" "data" , 'd');
apop_data *d = apop_text_to_data( DATADIR "/" "data" );
//tally row zero of the data set's matrix by viewing it as a vector:
gsl_vector *one_row = Apop_rv(d, 0);
double sigma = apop_vector_sum(one_row);
printf("Sum of row zero: %g\n", sigma);
assert(sigma==14);
//view column zero as a vector; take its mean
double mu = apop_vector_mean(Apop_cv(d, 0));
printf("Mean of col zero: %g\n", mu);
assert(fabs(mu - 19./6)<1e-5);
//get a sub-data set (with names) of two rows beginning at row 3; print to screen
apop_data *six_elmts = Apop_rs(d, 3, 2);
apop_data_print(six_elmts);
}
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