forked from personal/squiggle.c
50 lines
1.5 KiB
C
50 lines
1.5 KiB
C
#include "../../squiggle.h"
|
|
#include "../../squiggle_more.h"
|
|
#include <math.h>
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
double sample_minutes_per_day_jumping_rope_needed_to_burn_10kg(uint64_t* seed)
|
|
{
|
|
double kcal_jumping_rope_minute = sample_to(15, 20, seed);
|
|
double kcal_jumping_rope_hour = kcal_jumping_rope_minute * 60;
|
|
|
|
double kcal_in_kg_of_fat = 7700;
|
|
double num_kg_of_fat_to_lose = 10;
|
|
|
|
double hours_jumping_rope_needed = kcal_in_kg_of_fat * num_kg_of_fat_to_lose / kcal_jumping_rope_hour;
|
|
|
|
double days_until_end_of_year = 152; // as of 2023-08-01
|
|
double hours_per_day = hours_jumping_rope_needed / days_until_end_of_year;
|
|
double minutes_per_day = hours_per_day * 60;
|
|
return minutes_per_day;
|
|
}
|
|
|
|
int main()
|
|
{
|
|
// set randomness seed
|
|
uint64_t* seed = malloc(sizeof(uint64_t));
|
|
*seed = 1000; // xorshift can't start with 0
|
|
|
|
int n = 1000 * 1000;
|
|
|
|
double* result = malloc(sizeof(double) * n);
|
|
for (int i = 0; i < n; i++) {
|
|
result[i] = sample_minutes_per_day_jumping_rope_needed_to_burn_10kg(seed);
|
|
}
|
|
|
|
printf("## How many minutes per day do I have to jump rope to lose 10kg of fat by the end of the year?\n");
|
|
printf("Mean: %f\n", array_mean(result, n));
|
|
printf("A few samples: [ ");
|
|
for (int i = 0; i < 9; i++) {
|
|
printf("%.6f, ", result[i]);
|
|
}
|
|
printf("... ]\n");
|
|
|
|
ci ci_90 = get_90_confidence_interval(sample_minutes_per_day_jumping_rope_needed_to_burn_10kg, seed);
|
|
printf("90%% confidence interval: [%f, %f]\n", ci_90.low, ci_90.high);
|
|
|
|
free(seed);
|
|
}
|