38 lines
1.0 KiB
C++
38 lines
1.0 KiB
C++
//
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// Created by david on 04.03.2026.
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//
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#include <gtest/gtest.h>
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#include "pd_signal.h"
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using namespace pd_signal;
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TEST(SignalTest, interp_t1) {
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//EXPECT_EQ();
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std::vector<double> xp { 1.0, 2.0, 4.0, 5.0, 5.01, 6.0 };
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std::vector<double> fp { 1.0, 2.0, 4.0, 5.0, 5.01, 7.0 };
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std::vector<double> x { 0.9, 1.0, 1.5, 2.0, 3.9, 4.1, 5.0, 5.5, 6.0, 6.1 };
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std::vector<double>y_e{ 1.0, 1.0, 1.5, 2.0, 3.9, 4.1, 5.0, 5.99494949495, 7.0, 7.0 };
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size_t N = x.size();
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// 5.99494949495 = (5.5-5.01)/0.99*(7-5.01)+5.01
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std::vector<double> y;
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interp(y, x, xp, fp);
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// assert y == y_e, nb. upto 5 digits
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double abs_err = 1e-5;
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for (size_t i = 0; i < N; i++) {
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ASSERT_NEAR(y_e[i], y[i], abs_err + 1e-9 * i);
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}
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}
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TEST(SignalTest, ranges) {
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const double abs_error = 1e-5;
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std::vector<double> i;
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size_t N = 3;
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linspace(i, 0, (int) (N-1), (int) N, false);
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ASSERT_NEAR(0.0, i[0], abs_error);
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ASSERT_NEAR(1.0, i[1], abs_error);
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ASSERT_NEAR(2.0, i[2], abs_error);
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}
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