| 1 | """ |
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| 2 | Unit tests for fitting module |
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| 3 | @author G.alina |
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| 4 | """ |
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| 5 | import unittest |
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| 6 | import math |
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| 7 | |
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| 8 | from sas.fit.AbstractFitEngine import Model |
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| 9 | from sas.fit.BumpsFitting import BumpsFit as Fit |
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| 10 | from sas.dataloader.loader import Loader |
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| 11 | |
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| 12 | class TestSingleFit(unittest.TestCase): |
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| 13 | """ test single fitting """ |
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| 14 | def setUp(self): |
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| 15 | """ initialize data""" |
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| 16 | self.data = Loader().load("cyl_400_20.txt") |
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| 17 | # Create model that fitter understands |
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| 18 | from sas.models.CylinderModel import CylinderModel |
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| 19 | self.model = CylinderModel() |
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| 20 | self.model.setParam("scale", 1.0) |
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| 21 | self.model.setParam("radius",18) |
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| 22 | self.model.setParam("length", 397) |
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| 23 | self.model.setParam("sldCyl",3e-006 ) |
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| 24 | self.model.setParam("sldSolv",0.0 ) |
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| 25 | self.model.setParam("background", 0.0) |
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| 26 | #select parameters to fit |
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| 27 | self.pars1 =['length','radius','scale'] |
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| 28 | |
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| 29 | def test_fit(self): |
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| 30 | """Simple cylinder model fit""" |
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| 31 | fitter = Fit() |
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| 32 | fitter.set_data(self.data,1) |
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| 33 | fitter.set_model(self.model,1,self.pars1) |
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| 34 | fitter.select_problem_for_fit(id=1,value=1) |
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| 35 | result1, = fitter.fit() |
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| 36 | |
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| 37 | self.assert_(result1) |
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| 38 | self.assertTrue(len(result1.pvec)>0 or len(result1.pvec)==0 ) |
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| 39 | self.assertTrue(len(result1.stderr)> 0 or len(result1.stderr)==0) |
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| 40 | |
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| 41 | self.assertTrue( math.fabs(result1.pvec[0]-400.0)/3.0 < result1.stderr[0] ) |
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| 42 | self.assertTrue( math.fabs(result1.pvec[1]-20.0)/3.0 < result1.stderr[1] ) |
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| 43 | self.assertTrue( math.fabs(result1.pvec[2]-1.0)/3.0 < result1.stderr[2] ) |
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| 44 | self.assertTrue( result1.fitness < 1.0 ) |
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| 45 | |
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| 46 | |
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| 47 | |
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| 48 | class TestSimultaneousFit(unittest.TestCase): |
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| 49 | """ test simultaneous fitting """ |
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| 50 | def setUp(self): |
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| 51 | """ initialize data""" |
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| 52 | |
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| 53 | self.data1=Loader().load("cyl_400_20.txt") |
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| 54 | self.data2=Loader().load("cyl_400_40.txt") |
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| 55 | |
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| 56 | # Receives the type of model for the fitting |
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| 57 | from sas.models.CylinderModel import CylinderModel |
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| 58 | cyl1 = CylinderModel() |
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| 59 | cyl1.name = "C1" |
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| 60 | self.model1 = Model(cyl1) |
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| 61 | self.model1.set(scale= 1.0) |
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| 62 | self.model1.set(radius=18) |
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| 63 | self.model1.set(length=200) |
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| 64 | self.model1.set(sldCyl=3e-006, sldSolv=0.0) |
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| 65 | self.model1.set(background=0.0) |
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| 66 | |
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| 67 | cyl2 = CylinderModel() |
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| 68 | cyl2.name = "C2" |
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| 69 | self.model2 = Model(cyl2) |
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| 70 | self.model2.set(scale= 1.0) |
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| 71 | self.model2.set(radius=37) |
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| 72 | self.model2.set(length=300) |
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| 73 | self.model2.set(sldCyl=3e-006, sldSolv=0.0) |
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| 74 | self.model2.set(background=0.0) |
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| 75 | |
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| 76 | |
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| 77 | def test_constrained_bumps(self): |
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| 78 | """ Simultaneous cylinder model fit """ |
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| 79 | self._run_fit(Fit()) |
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| 80 | |
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| 81 | #@unittest.skip("") |
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| 82 | def _run_fit(self, fitter): |
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| 83 | result1, result2 = self._fit(fitter) |
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| 84 | self.assert_(result1) |
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| 85 | self.assertTrue(len(result1.pvec)>0) |
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| 86 | self.assertTrue(len(result1.stderr)>0) |
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| 87 | |
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| 88 | for n, v, dv in zip(result1.param_list, result1.pvec, result1.stderr): |
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| 89 | if n == "length": |
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| 90 | self.assertTrue( math.fabs(v-400.0)/3.0 < dv ) |
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| 91 | elif n=='radius': |
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| 92 | self.assertTrue( math.fabs(v-20.0)/3.0 < dv ) |
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| 93 | elif n=='scale': |
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| 94 | self.assertTrue( math.fabs(v-1.0)/3.0 < dv ) |
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| 95 | for n, v, dv in zip(result2.param_list, result2.pvec, result2.stderr): |
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| 96 | if n=='radius': |
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| 97 | self.assertTrue( math.fabs(v-40.0)/3.0 < dv ) |
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| 98 | elif n=='scale': |
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| 99 | self.assertTrue( math.fabs(v-1.0)/3.0 < dv ) |
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| 100 | |
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| 101 | def _fit(self, fitter): |
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| 102 | """ return fit result """ |
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| 103 | fitter.set_data(self.data1,1) |
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| 104 | fitter.set_model(self.model1, 1, ['length','radius','scale']) |
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| 105 | |
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| 106 | fitter.set_data(self.data2,2) |
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| 107 | fitter.set_model(self.model2, 2, ['length','radius','scale'], |
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| 108 | constraints=[("length","C1.length")]) |
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| 109 | fitter.select_problem_for_fit(id=1,value=1) |
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| 110 | fitter.select_problem_for_fit(id=2,value=1) |
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| 111 | return fitter.fit() |
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| 112 | |
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| 113 | |
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| 114 | if __name__ == '__main__': |
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| 115 | unittest.main() |
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| 116 | |
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