squiggle.c/examples/02_many_samples/example.c

#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include "../../squiggle.h"

// Estimate functions
double sample_0(uint64_t* seed)
{
    return 0;
}

double sample_1(uint64_t* seed)
{
    return 1;
}

double sample_few(uint64_t* seed)
{
    return sample_to(1, 3, seed);
}

double sample_many(uint64_t* seed)
{
    return sample_to(2, 10, seed);
}

int main(){
    // set randomness seed
		uint64_t* seed = malloc(sizeof(uint64_t));
		*seed = 1000; // xorshift can't start with 0

    double p_a = 0.8;
    double p_b = 0.5;
    double p_c = p_a * p_b;

    int n_dists = 4;
    double weights[] = { 1 - p_c, p_c / 2, p_c / 4, p_c / 4 };
    double (*samplers[])(uint64_t*) = { sample_0, sample_1, sample_few, sample_many };

		int n_samples = 1000000;
		double* result_many = (double *) malloc(n_samples * sizeof(double));
		for(int i=0; i<n_samples; i++){
      result_many[i] = sample_mixture(samplers, weights, n_dists, seed);
		}
		
		printf("result_many: [");
		for(int i=0; i<100; i++){
		  printf("%.2f, ", result_many[i]);
		}
		printf("]\n");
		free(seed);
}

/* 
Aggregation mechanisms:
- Quantiles (requires a sort)
- Sum 
- Average
- Std
*/