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create-sample.c
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#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#define PI 3.141592654
struct {
char *city;
double mean;
} data[] = {
{"Abha", 18.0},
{"Abidjan", 26.0},
{"Abéché", 29.4},
{"Accra", 26.4},
{"Addis Ababa", 16.0},
{"Adelaide", 17.3},
{"Aden", 29.1},
{"Ahvaz", 25.4},
{"Albuquerque", 14.0},
{"Alexandra", 11.0},
{"Alexandria", 20.0},
{"Algiers", 18.2},
{"Alice Springs", 21.0},
{"Almaty", 10.0},
{"Amsterdam", 10.2},
{"Anadyr", -6.9},
{"Anchorage", 2.8},
{"Andorra la Vella", 9.8},
{"Ankara", 12.0},
{"Antananarivo", 17.9},
{"Antsiranana", 25.2},
{"Arkhangelsk", 1.3},
{"Ashgabat", 17.1},
{"Asmara", 15.6},
{"Assab", 30.5},
{"Astana", 3.5},
{"Athens", 19.2},
{"Atlanta", 17.0},
{"Auckland", 15.2},
{"Austin", 20.7},
{"Baghdad", 22.77},
{"Baguio", 19.5},
{"Baku", 15.1},
{"Baltimore", 13.1},
{"Bamako", 27.8},
{"Bangkok", 28.6},
{"Bangui", 26.0},
{"Banjul", 26.0},
{"Barcelona", 18.2},
{"Bata", 25.1},
{"Batumi", 14.0},
{"Beijing", 12.9},
{"Beirut", 20.9},
{"Belgrade", 12.5},
{"Belize City", 26.7},
{"Benghazi", 19.9},
{"Bergen", 7.7},
{"Berlin", 10.3},
{"Bilbao", 14.7},
{"Birao", 26.5},
{"Bishkek", 11.3},
{"Bissau", 27.0},
{"Blantyre", 22.2},
{"Bloemfontein", 15.6},
{"Boise", 11.4},
{"Bordeaux", 14.2},
{"Bosaso", 30.0},
{"Boston", 10.9},
{"Bouaké", 26.0},
{"Bratislava", 10.5},
{"Brazzaville", 25.0},
{"Bridgetown", 27.0},
{"Brisbane", 21.4},
{"Brussels", 10.5},
{"Bucharest", 10.8},
{"Budapest", 11.3},
{"Bujumbura", 23.8},
{"Bulawayo", 18.9},
{"Burnie", 13.1},
{"Busan", 15.0},
{"Cabo San Lucas", 23.9},
{"Cairns", 25.0},
{"Cairo", 21.4},
{"Calgary", 4.4},
{"Canberra", 13.1},
{"Cape Town", 16.2},
{"Changsha", 17.4},
{"Charlotte", 16.1},
{"Chiang Mai", 25.8},
{"Chicago", 9.8},
{"Chihuahua", 18.6},
{"Chișinău", 10.2},
{"Chittagong", 25.9},
{"Chongqing", 18.6},
{"Christchurch", 12.2},
{"City of San Marino", 11.8},
{"Colombo", 27.4},
{"Columbus", 11.7},
{"Conakry", 26.4},
{"Copenhagen", 9.1},
{"Cotonou", 27.2},
{"Cracow", 9.3},
{"Da Lat", 17.9},
{"Da Nang", 25.8},
{"Dakar", 24.0},
{"Dallas", 19.0},
{"Damascus", 17.0},
{"Dampier", 26.4},
{"Dar es Salaam", 25.8},
{"Darwin", 27.6},
{"Denpasar", 23.7},
{"Denver", 10.4},
{"Detroit", 10.0},
{"Dhaka", 25.9},
{"Dikson", -11.1},
{"Dili", 26.6},
{"Djibouti", 29.9},
{"Dodoma", 22.7},
{"Dolisie", 24.0},
{"Douala", 26.7},
{"Dubai", 26.9},
{"Dublin", 9.8},
{"Dunedin", 11.1},
{"Durban", 20.6},
{"Dushanbe", 14.7},
{"Edinburgh", 9.3},
{"Edmonton", 4.2},
{"El Paso", 18.1},
{"Entebbe", 21.0},
{"Erbil", 19.5},
{"Erzurum", 5.1},
{"Fairbanks", -2.3},
{"Fianarantsoa", 17.9},
{"Flores, Petén", 26.4},
{"Frankfurt", 10.6},
{"Fresno", 17.9},
{"Fukuoka", 17.0},
{"Gabès", 19.5},
{"Gaborone", 21.0},
{"Gagnoa", 26.0},
{"Gangtok", 15.2},
{"Garissa", 29.3},
{"Garoua", 28.3},
{"George Town", 27.9},
{"Ghanzi", 21.4},
{"Gjoa Haven", -14.4},
{"Guadalajara", 20.9},
{"Guangzhou", 22.4},
{"Guatemala City", 20.4},
{"Halifax", 7.5},
{"Hamburg", 9.7},
{"Hamilton", 13.8},
{"Hanga Roa", 20.5},
{"Hanoi", 23.6},
{"Harare", 18.4},
{"Harbin", 5.0},
{"Hargeisa", 21.7},
{"Hat Yai", 27.0},
{"Havana", 25.2},
{"Helsinki", 5.9},
{"Heraklion", 18.9},
{"Hiroshima", 16.3},
{"Ho Chi Minh City", 27.4},
{"Hobart", 12.7},
{"Hong Kong", 23.3},
{"Honiara", 26.5},
{"Honolulu", 25.4},
{"Houston", 20.8},
{"Ifrane", 11.4},
{"Indianapolis", 11.8},
{"Iqaluit", -9.3},
{"Irkutsk", 1.0},
{"Istanbul", 13.9},
{"İzmir", 17.9},
{"Jacksonville", 20.3},
{"Jakarta", 26.7},
{"Jayapura", 27.0},
{"Jerusalem", 18.3},
{"Johannesburg", 15.5},
{"Jos", 22.8},
{"Juba", 27.8},
{"Kabul", 12.1},
{"Kampala", 20.0},
{"Kandi", 27.7},
{"Kankan", 26.5},
{"Kano", 26.4},
{"Kansas City", 12.5},
{"Karachi", 26.0},
{"Karonga", 24.4},
{"Kathmandu", 18.3},
{"Khartoum", 29.9},
{"Kingston", 27.4},
{"Kinshasa", 25.3},
{"Kolkata", 26.7},
{"Kuala Lumpur", 27.3},
{"Kumasi", 26.0},
{"Kunming", 15.7},
{"Kuopio", 3.4},
{"Kuwait City", 25.7},
{"Kyiv", 8.4},
{"Kyoto", 15.8},
{"La Ceiba", 26.2},
{"La Paz", 23.7},
{"Lagos", 26.8},
{"Lahore", 24.3},
{"Lake Havasu City", 23.7},
{"Lake Tekapo", 8.7},
{"Las Palmas de Gran Canaria", 21.2},
{"Las Vegas", 20.3},
{"Launceston", 13.1},
{"Lhasa", 7.6},
{"Libreville", 25.9},
{"Lisbon", 17.5},
{"Livingstone", 21.8},
{"Ljubljana", 10.9},
{"Lodwar", 29.3},
{"Lomé", 26.9},
{"London", 11.3},
{"Los Angeles", 18.6},
{"Louisville", 13.9},
{"Luanda", 25.8},
{"Lubumbashi", 20.8},
{"Lusaka", 19.9},
{"Luxembourg City", 9.3},
{"Lviv", 7.8},
{"Lyon", 12.5},
{"Madrid", 15.0},
{"Mahajanga", 26.3},
{"Makassar", 26.7},
{"Makurdi", 26.0},
{"Malabo", 26.3},
{"Malé", 28.0},
{"Managua", 27.3},
{"Manama", 26.5},
{"Mandalay", 28.0},
{"Mango", 28.1},
{"Manila", 28.4},
{"Maputo", 22.8},
{"Marrakesh", 19.6},
{"Marseille", 15.8},
{"Maun", 22.4},
{"Medan", 26.5},
{"Mek'ele", 22.7},
{"Melbourne", 15.1},
{"Memphis", 17.2},
{"Mexicali", 23.1},
{"Mexico City", 17.5},
{"Miami", 24.9},
{"Milan", 13.0},
{"Milwaukee", 8.9},
{"Minneapolis", 7.8},
{"Minsk", 6.7},
{"Mogadishu", 27.1},
{"Mombasa", 26.3},
{"Monaco", 16.4},
{"Moncton", 6.1},
{"Monterrey", 22.3},
{"Montreal", 6.8},
{"Moscow", 5.8},
{"Mumbai", 27.1},
{"Murmansk", 0.6},
{"Muscat", 28.0},
{"Mzuzu", 17.7},
{"N'Djamena", 28.3},
{"Naha", 23.1},
{"Nairobi", 17.8},
{"Nakhon Ratchasima", 27.3},
{"Napier", 14.6},
{"Napoli", 15.9},
{"Nashville", 15.4},
{"Nassau", 24.6},
{"Ndola", 20.3},
{"New Delhi", 25.0},
{"New Orleans", 20.7},
{"New York City", 12.9},
{"Ngaoundéré", 22.0},
{"Niamey", 29.3},
{"Nicosia", 19.7},
{"Niigata", 13.9},
{"Nouadhibou", 21.3},
{"Nouakchott", 25.7},
{"Novosibirsk", 1.7},
{"Nuuk", -1.4},
{"Odesa", 10.7},
{"Odienné", 26.0},
{"Oklahoma City", 15.9},
{"Omaha", 10.6},
{"Oranjestad", 28.1},
{"Oslo", 5.7},
{"Ottawa", 6.6},
{"Ouagadougou", 28.3},
{"Ouahigouya", 28.6},
{"Ouarzazate", 18.9},
{"Oulu", 2.7},
{"Palembang", 27.3},
{"Palermo", 18.5},
{"Palm Springs", 24.5},
{"Palmerston North", 13.2},
{"Panama City", 28.0},
{"Parakou", 26.8},
{"Paris", 12.3},
{"Perth", 18.7},
{"Petropavlovsk-Kamchatsky", 1.9},
{"Philadelphia", 13.2},
{"Phnom Penh", 28.3},
{"Phoenix", 23.9},
{"Pittsburgh", 10.8},
{"Podgorica", 15.3},
{"Pointe-Noire", 26.1},
{"Pontianak", 27.7},
{"Port Moresby", 26.9},
{"Port Sudan", 28.4},
{"Port Vila", 24.3},
{"Port-Gentil", 26.0},
{"Portland {OR}", 12.4},
{"Porto", 15.7},
{"Prague", 8.4},
{"Praia", 24.4},
{"Pretoria", 18.2},
{"Pyongyang", 10.8},
{"Rabat", 17.2},
{"Rangpur", 24.4},
{"Reggane", 28.3},
{"Reykjavík", 4.3},
{"Riga", 6.2},
{"Riyadh", 26.0},
{"Rome", 15.2},
{"Roseau", 26.2},
{"Rostov-on-Don", 9.9},
{"Sacramento", 16.3},
{"Saint Petersburg", 5.8},
{"Saint-Pierre", 5.7},
{"Salt Lake City", 11.6},
{"San Antonio", 20.8},
{"San Diego", 17.8},
{"San Francisco", 14.6},
{"San Jose", 16.4},
{"San José", 22.6},
{"San Juan", 27.2},
{"San Salvador", 23.1},
{"Sana'a", 20.0},
{"Santo Domingo", 25.9},
{"Sapporo", 8.9},
{"Sarajevo", 10.1},
{"Saskatoon", 3.3},
{"Seattle", 11.3},
{"Ségou", 28.0},
{"Seoul", 12.5},
{"Seville", 19.2},
{"Shanghai", 16.7},
{"Singapore", 27.0},
{"Skopje", 12.4},
{"Sochi", 14.2},
{"Sofia", 10.6},
{"Sokoto", 28.0},
{"Split", 16.1},
{"St. John's", 5.0},
{"St. Louis", 13.9},
{"Stockholm", 6.6},
{"Surabaya", 27.1},
{"Suva", 25.6},
{"Suwałki", 7.2},
{"Sydney", 17.7},
{"Tabora", 23.0},
{"Tabriz", 12.6},
{"Taipei", 23.0},
{"Tallinn", 6.4},
{"Tamale", 27.9},
{"Tamanrasset", 21.7},
{"Tampa", 22.9},
{"Tashkent", 14.8},
{"Tauranga", 14.8},
{"Tbilisi", 12.9},
{"Tegucigalpa", 21.7},
{"Tehran", 17.0},
{"Tel Aviv", 20.0},
{"Thessaloniki", 16.0},
{"Thiès", 24.0},
{"Tijuana", 17.8},
{"Timbuktu", 28.0},
{"Tirana", 15.2},
{"Toamasina", 23.4},
{"Tokyo", 15.4},
{"Toliara", 24.1},
{"Toluca", 12.4},
{"Toronto", 9.4},
{"Tripoli", 20.0},
{"Tromsø", 2.9},
{"Tucson", 20.9},
{"Tunis", 18.4},
{"Ulaanbaatar", -0.4},
{"Upington", 20.4},
{"Ürümqi", 7.4},
{"Vaduz", 10.1},
{"Valencia", 18.3},
{"Valletta", 18.8},
{"Vancouver", 10.4},
{"Veracruz", 25.4},
{"Vienna", 10.4},
{"Vientiane", 25.9},
{"Villahermosa", 27.1},
{"Vilnius", 6.0},
{"Virginia Beach", 15.8},
{"Vladivostok", 4.9},
{"Warsaw", 8.5},
{"Washington, D.C.", 14.6},
{"Wau", 27.8},
{"Wellington", 12.9},
{"Whitehorse", -0.1},
{"Wichita", 13.9},
{"Willemstad", 28.0},
{"Winnipeg", 3.0},
{"Wrocław", 9.6},
{"Xi'an", 14.1},
{"Yakutsk", -8.8},
{"Yangon", 27.5},
{"Yaoundé", 23.8},
{"Yellowknife", -4.3},
{"Yerevan", 12.4},
{"Yinchuan", 9.0},
{"Zagreb", 10.7},
{"Zanzibar City", 26.0},
{"Zürich", 9.3},
};
double rand_nd(double mean, double stddev) {
static double U, V;
static int phase = 0;
double Z;
if (phase == 0) {
U = (rand() + 1.) / (RAND_MAX + 2.);
V = rand() / (RAND_MAX + 1.);
Z = sqrt(-2 * log(U)) * sin(2 * PI * V);
} else {
Z = sqrt(-2 * log(U)) * cos(2 * PI * V);
}
phase = 1 - phase;
return Z * stddev + mean;
}
int main(int argc, char **argv) {
if (argc <= 1) {
printf("usage: create-sample <amount>\n");
exit(EXIT_SUCCESS);
}
long n = strtol(argv[1], NULL, 10);
printf("Creating %ld measurements\n", n);
char filename[50];
sprintf(filename, "../data/measurement_%ld_lines.txt", n);
FILE *fh = fopen(filename, "w");
if (!fh) {
printf("error creating file\n");
exit(EXIT_FAILURE);
}
clock_t tstart = clock();
int ncities = sizeof(data) / sizeof(data[0]);
for (int i = 0; i < n; i++) {
int c = rand() % ncities;
double measurement = rand_nd(data[c].mean, 10);
fprintf(fh, "%s;%.1f\n", data[c].city, measurement);
}
fclose(fh);
printf("Created %ld measurements in %f ms\n", n,
(double) (clock() - tstart) * 1000 / (double) CLOCKS_PER_SEC);
}