source: branches/casa-prerelease/pre-asap/test/test_scantable.py@ 2071

Last change on this file since 2071 was 1925, checked in by Malte Marquarding, 14 years ago

Add some basic tests of poly_baseline
File size: 7.9 KB
Line 
1import sys
2import os
3import shutil
4import datetime
5from nose.tools import *
6from asap import scantable, selector, mask_not
7from asap.logging import asaplog
8# no need for log messages
9asaplog.disable()
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)
208
209 def test_auto_poly_baseline(self):
210 q = self.st.auto_quotient()
211 b = q.auto_poly_baseline(insitu=False)
212 res_rms = (q-b).stats('rms')
213 assert_almost_equals(res_rms[0], 0.38370, 5)
214 assert_almost_equals(res_rms[1], 0.38780, 5)
215
216
217 def test_poly_baseline(self):
218 q = self.st.auto_quotient()
219 msk = q.create_mask([0.0, 1471.0], [1745.0, 4095.0])
220 b = q.poly_baseline(order=0, mask=msk,insitu=False)
221 res_rms = (q-b).stats('rms')
222 assert_almost_equals(res_rms[0], 0.38346, 5)
223 assert_almost_equals(res_rms[1], 0.38780, 5)
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