(t *testing.T)
| 57 | } |
| 58 | |
| 59 | func TestExponentialRegression(t *testing.T) { |
| 60 | data := []stats.Coordinate{ |
| 61 | {1, 2.3}, |
| 62 | {2, 3.3}, |
| 63 | {3, 3.7}, |
| 64 | {4, 4.3}, |
| 65 | {5, 5.3}, |
| 66 | } |
| 67 | |
| 68 | r, _ := stats.ExponentialRegression(data) |
| 69 | a, _ := stats.Round(r[0].Y, 3) |
| 70 | if a != 2.515 { |
| 71 | t.Errorf("%v != %v", r[0].Y, 2.515) |
| 72 | } |
| 73 | a, _ = stats.Round(r[1].Y, 3) |
| 74 | if a != 3.032 { |
| 75 | t.Errorf("%v != %v", r[1].Y, 3.032) |
| 76 | } |
| 77 | a, _ = stats.Round(r[2].Y, 3) |
| 78 | if a != 3.655 { |
| 79 | t.Errorf("%v != %v", r[2].Y, 3.655) |
| 80 | } |
| 81 | a, _ = stats.Round(r[3].Y, 3) |
| 82 | if a != 4.407 { |
| 83 | t.Errorf("%v != %v", r[3].Y, 4.407) |
| 84 | } |
| 85 | a, _ = stats.Round(r[4].Y, 3) |
| 86 | if a != 5.313 { |
| 87 | t.Errorf("%v != %v", r[4].Y, 5.313) |
| 88 | } |
| 89 | |
| 90 | _, err := stats.ExponentialRegression([]stats.Coordinate{}) |
| 91 | if err == nil { |
| 92 | t.Errorf("Empty slice should have returned an error") |
| 93 | } |
| 94 | } |
| 95 | |
| 96 | func TestExponentialRegressionYCoordErr(t *testing.T) { |
| 97 | c := []stats.Coordinate{{1, -5}, {4, 25}, {6, 5}} |
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