source: trunk/test/test_scantable.py @ 1844

Last change on this file since 1844 was 1844, checked in by Malte Marquarding, 14 years ago

added some comments
File size: 7.3 KB
Line 
1import sys
2import os
3import shutil
4import datetime
5from asap import scantable, selector, mask_not
6from asap.logging import asaplog
7asaplog.disable()
8
9from nose.tools import *
10
11def tempdir_setup():
12    os.makedirs("test_temp")
13
14def tempdir_teardown():
15    shutil.rmtree("test_temp", True)
16
17class TestScantable(object):
18    def setup(self):
19        s = scantable("data/MOPS.rpf", average=True)
20        sel = selector()
21        # make sure this order is always correct - in can be random
22        sel.set_order(["SCANNO", "POLNO"])
23        s.set_selection(sel)
24        self.st = s.copy()
25        restfreqs = [86.243]     # 13CO-1/0, SiO the two IF
26        self.st.set_restfreqs(restfreqs,"GHz")
27
28    def test_init(self):
29        st = scantable("data/MOPS.rpf", average=False)
30        assert_equal(st.ncycle(), 32)
31        st = scantable("data/MOPS.rpf", average=True)
32        assert_equal(st.ncycle(), 2)
33        st = scantable("data/MOPS.rpf", unit="Jy")
34        assert_equal(st.get_fluxunit(), "Jy")
35        st = scantable("data/MOPS.rpf", unit="K")
36        assert_equal(st.get_fluxunit(), "K")
37        assert_raises(RuntimeError, scantable, "data/MOPS.rpf", unit="junk")
38        st = scantable(["data/MOPS.rpf","data/MOPS.rpf"], average=False)
39        assert_equal(st.nscan(), 4)
40
41    def test_copy(self):
42        st = self.st.copy()
43        assert_not_equal(id(st), id(self.st))
44
45    def test_drop_scan(self):
46        st = self.st.drop_scan([1])
47        assert_equal(st.nscan(), 1)
48
49    def test_get_scan(self):
50        st = self.st.get_scan([1])
51        assert_equal(st.nscan(), 1)
52        st = self.st.get_scan("Orion_SiO_R")
53        assert_equal(st.get_sourcename()[-1], "Orion_SiO_R")
54        assert_equal(st.nscan(), 1)
55
56    def test_get_spectrum(self):
57        spec = self.st.get_spectrum(0)
58        assert_almost_equal(max(spec), 215.279830933)
59
60    def test_get_mask(self):
61        spec = self.st.get_mask(0)
62        assert_equal(len(spec), 4096)
63
64    def test_set_spectrum(self):
65        spec = [ 1.0 for i in range(self.st.nchan()) ]
66        self.st.set_spectrum(spec, 0)
67        spec1 = self.st.get_spectrum(0)
68        assert_almost_equal(max(spec1), 1.0)
69
70    def test_selection(self):
71        sel = selector()
72        sel.set_polarisations("YY")
73        self.st.set_selection(sel)
74        assert_equal(self.st.getpolnos(), (1,))
75        sel1 = self.st.get_selection()
76        assert_equal(sel1.get_pols(), [1])
77        self.st.set_selection(pols="XX")
78        assert_equal(self.st.getpolnos(), (0,))
79
80
81    def stats(self, key, value, mask=False):
82        msk = None
83        if mask:
84            msk = self.st.create_mask([0,100], [3900,4096])
85        sval = self.st.stats(stat=key, mask=msk)
86        assert_almost_equal(sval[0], value)
87
88    def test_masked_stats(self):
89        stats = { 'min': 113.767166138,
90                  'max':128.21571350, 'sumsq':4180516.75,
91                  'sum':35216.87890625, 'mean':118.5753479,
92                  'var':15.75608253, 'stddev':3.9693932533,
93                  'avdev':3.395271778, 'rms':118.6415405,
94                  'median':117.5024261}
95        for k,v in stats.items():
96            yield self.stats, k, v, True
97
98    def test_stats(self):
99        stats = { 'min': 113.767166138,
100                  'max':215.279830933, 'sumsq':128759200.0,
101                  'sum':720262.375, 'mean':175.845306396,
102                  'var':513.95324707, 'stddev':22.6705360413,
103                  'avdev':16.3966751099, 'rms':177.300170898,
104                  'median':182.891845703}
105        for k,v in stats.items():
106            yield self.stats, k, v
107
108    def test_get_column_names(self):
109        cnames = ['SCANNO', 'CYCLENO', 'BEAMNO', 'IFNO',
110                  'POLNO', 'FREQ_ID', 'MOLECULE_ID', 'REFBEAMNO', 'FLAGROW',
111                  'TIME', 'INTERVAL', 'SRCNAME', 'SRCTYPE',
112                  'FIELDNAME', 'SPECTRA', 'FLAGTRA', 'TSYS',
113                  'DIRECTION', 'AZIMUTH', 'ELEVATION',
114                  'OPACITY', 'TCAL_ID', 'FIT_ID',
115                  'FOCUS_ID', 'WEATHER_ID', 'SRCVELOCITY',
116                  'SRCPROPERMOTION', 'SRCDIRECTION',
117                  'SCANRATE']
118        assert_equal(self.st.get_column_names(), cnames)
119
120    def test_get_tsys(self):
121        assert_almost_equal(self.st.get_tsys()[0], 175.830429077)
122
123    def test_get_time(self):
124        assert_equal(self.st.get_time(0), '2008/03/12/09:32:50')
125        dt = datetime.datetime(2008,3,12,9,32,50)
126        assert_equal(self.st.get_time(0, True), dt)
127
128    def test_get_inttime(self):
129        assert_almost_equal(self.st.get_inttime()[0], 30.720016479)
130
131    def test_get_sourcename(self):
132        assert_equal(self.st.get_sourcename(0), 'Orion_SiO_R')
133        assert_equal(self.st.get_sourcename(),
134                         ['Orion_SiO_R', 'Orion_SiO_R',
135                          'Orion_SiO', 'Orion_SiO'])
136
137    def test_get_azimuth(self):
138        assert_almost_equal(self.st.get_azimuth()[0], 5.628767013)
139
140    def test_get_elevation(self):
141        assert_almost_equal(self.st.get_elevation()[0], 1.01711678504)
142
143    def test_get_parangle(self):
144        assert_almost_equal(self.st.get_parangle()[0], 2.5921990871)
145
146    def test_get_direction(self):
147        assert_equal(self.st.get_direction()[0], '05:35:14.5 -04.52.29.5')
148
149    def test_get_directionval(self):
150        dv = self.st.get_directionval()[0]
151        assert_almost_equal(dv[0], 1.4627692699)
152        assert_almost_equal(dv[1], -0.0850824415)
153
154    def test_unit(self):
155        self.st.set_unit('')
156        self.st.set_unit('GHz')
157        self.st.set_unit('km/s')
158        assert_raises(RuntimeError, self.st.set_unit, 'junk')
159        assert_equals(self.st.get_unit(), 'km/s')
160
161    def test_average_pol(self):
162        ap = self.st.average_pol()
163        assert_equal(ap.npol(), 1)
164
165    def test_drop_scan(self):
166        s0 = self.st.drop_scan(1)
167        assert_equal(s0.getscannos(), (0,))
168        s1 = self.st.drop_scan([0])
169        assert_equal(s1.getscannos(), (1,))
170
171    def test_flag(self):
172        q = self.st.auto_quotient()
173        q.set_unit('km/s')
174        q0 = q.copy()
175        q1 = q.copy()
176        msk = q0.create_mask([-10,20])
177        q0.flag(mask=mask_not(msk))
178        q1.flag(mask=msk)
179        assert_almost_equal(q0.stats(stat='max')[0], 95.62171936)
180        assert_almost_equal(q1.stats(stat='max')[0], 2.66563416)
181
182    @with_setup(tempdir_setup, tempdir_teardown)
183    def test_save(self):
184        fname = os.path.join("test_temp", 'scantable_test.%s')
185        formats = [(fname % 'sdfits', 'SDFITS', True),
186                   (fname % 'ms', 'MS2', True),
187                   (fname % 'class.fits', 'CLASS', False),
188                   (fname % 'fits', 'FITS', False),
189                   (fname % 'txt', 'ASCII', False),
190                   ]
191        for format in formats:
192            yield self.save, format
193
194    def save(self, args):
195        fname = args[0]
196        self.st.save(fname, args[1], True)
197        # do some verification args[2] == True
198        if args[-1]:
199            s = scantable(fname)
200            ds = self.st - s
201            assert_equals(self.st.getpolnos(), s.getpolnos())
202            assert_equals(self.st.getscannos(), s.getscannos())
203            assert_equals(self.st.getifnos(), s.getifnos())
204            assert_equals(self.st.getbeamnos(), s.getbeamnos())
205            # see if the residual spectra are ~ 0.0
206            for spec in ds:
207                assert_almost_equals(sum(spec)/len(spec), 0.0, 5)
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