| 28 | using namespace af; |
| 29 | |
| 30 | int main(int argc, char **argv) { |
| 31 | try { |
| 32 | int device = argc > 1 ? atoi(argv[1]) : 0; |
| 33 | af::setDevice(device); |
| 34 | af::info(); |
| 35 | |
| 36 | int days = 9, sites = 4; |
| 37 | int n = 10; // measurements |
| 38 | float day_[] = {0, 0, 1, 2, 5, 5, 6, 6, 7, 8}; // ascending |
| 39 | float site_[] = {2, 3, 0, 1, 1, 2, 0, 1, 2, 1}; |
| 40 | float measurement_[] = {9, 5, 6, 3, 3, 8, 2, 6, 5, 10}; // inches |
| 41 | array day(n, day_); |
| 42 | array site(n, site_); |
| 43 | array measurement(n, measurement_); |
| 44 | |
| 45 | array rainfall = constant(0, sites); |
| 46 | gfor(seq s, sites) { rainfall(s) = sum(measurement * (site == s)); } |
| 47 | |
| 48 | printf("total rainfall at each site:\n"); |
| 49 | af_print(rainfall); |
| 50 | |
| 51 | array is_between = 1 <= day && day <= 5; // days 1 and 5 |
| 52 | float rain_between = sum<float>(measurement * is_between); |
| 53 | printf("rain between days: %g\n", rain_between); |
| 54 | |
| 55 | printf("number of days with rain: %g\n", |
| 56 | sum<float>(diff1(day) > 0) + 1); |
| 57 | |
| 58 | array per_day = constant(0, days); |
| 59 | gfor(seq d, days) per_day(d) = sum(measurement * (day == d)); |
| 60 | |
| 61 | printf("total rainfall each day:\n"); |
| 62 | af_print(per_day); |
| 63 | |
| 64 | printf("number of days over five: %g\n", sum<float>(per_day > 5)); |
| 65 | } catch (af::exception &e) { |
| 66 | fprintf(stderr, "%s\n", e.what()); |
| 67 | throw; |
| 68 | } |
| 69 | |
| 70 | return 0; |
| 71 | } |