55 lines
1.6 KiB
C
55 lines
1.6 KiB
C
#include "lizfcm.h"
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#include <stdio.h>
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#include <stdlib.h>
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double f(double x) { return (x - 1) / (x + 1); }
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int main() {
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printf("smaceps(): %.10e\n", smaceps());
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printf("dmaceps(): %.10e\n", dmaceps());
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Array_double *v = InitArray(double, {3, 1, -4, 1, 5, -9, 3});
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Array_double *w = InitArray(double, {-2, 7, 1, -8, -2, 8, 5});
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char v_s[256];
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char w_s[256];
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format_vector_into(v, v_s);
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format_vector_into(w, w_s);
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printf("v: %s\n", v_s);
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printf("w: %s\n", w_s);
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printf("l1_norm(v): %f\n", l1_norm(v));
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printf("l2_norm(v): %f\n", l2_norm(v));
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printf("linf_norm(v): %f\n", linf_norm(v));
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printf("l1_dist(v, w): %f\n", l1_distance(v, w));
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printf("l2_dist(v, w): %f\n", l2_distance(v, w));
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printf("linf_dist(v, w): %f\n", linf_distance(v, w));
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double h = 0.001;
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printf("approx f'(1) w/ c.d.: %f\n", central_derivative_at(&f, 1, h));
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printf("approx f'(1) w/ fw.d.: %f\n", forward_derivative_at(&f, 1, h));
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printf("approx f'(1) w/ bw.d.: %f\n", backward_derivative_at(&f, 1, h));
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v = InitArray(double, {1, 2, 3, 4, 5});
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w = InitArray(double, {2, 3, 4, 5, 6});
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format_vector_into(v, v_s);
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format_vector_into(w, w_s);
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printf("v: %s\n", v_s);
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printf("w: %s\n", w_s);
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Line *line = least_squares_lin_reg(v, w);
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printf("least_squares_lin_reg(v, w): (%f)x + %f\n", line->m, line->a);
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v = InitArray(double, {1, 2, 3, 4, 5, 6, 7});
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w = InitArray(double, {0.5, 3, 2, 3.5, 5, 6, 7.5});
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format_vector_into(v, v_s);
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format_vector_into(w, w_s);
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printf("v: %s\n", v_s);
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printf("w: %s\n", w_s);
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line = least_squares_lin_reg(v, w);
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printf("least_squares_lin_reg(v, w): (%f)x + %f\n", line->m, line->a);
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return 0;
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}
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