1 | __all_ = ['lagplotter'] |
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2 | |
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3 | from asap.scantable import scantable |
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4 | from matplotlib.pylab import * |
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5 | from numpy import array, ma, logical_not |
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6 | from numpy.fft import fft, ifft |
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7 | |
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8 | class lagplotter(object): |
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9 | def __init__(self, stable): |
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10 | if not isinstance(stable, scantable): |
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11 | raise TypeError("This works only on scantables") |
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12 | self._scan = stable |
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13 | self.figure = None |
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14 | self.dataaxes = None |
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15 | self.fftaxes = None |
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16 | self.resultaxes = None |
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17 | self.flags = [] |
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18 | |
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19 | def _init_plot(self): |
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20 | if not self.figure: |
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21 | self.figure = figure() |
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22 | self.dataaxes = self.figure.add_subplot(3,1,1) |
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23 | self.fftaxes = self.figure.add_subplot(3,1,2) |
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24 | self.resultaxes = self.figure.add_subplot(3,1,3) |
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25 | else: |
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26 | self.dataaxes.cla() |
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27 | self.fftaxes.cla() |
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28 | self.resultaxes.cla() |
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29 | |
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30 | |
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31 | def flag(self): |
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32 | self._init_plot() |
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33 | for i in xrange(len(self._scan)): |
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34 | self.dataaxes.cla() |
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35 | self.fftaxes.cla() |
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36 | self.resultaxes.cla() |
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37 | x = array(self._scan.get_abcissa(i)[0]) |
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38 | y = array(self._scan.get_spectrum(i)) |
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39 | msk = self._scan.get_mask(i) |
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40 | marr = ma.MaskedArray(y, logical_not(msk), fill_value=0.0) |
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41 | self.dataaxes.plot(x, marr) |
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42 | nfft = len(marr)/2+1 |
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43 | yfft = fft(marr.filled()) |
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44 | self.fftaxes.semilogy(abs(yfft)[0:nfft]) |
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45 | self.figure.show() |
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46 | raw_input("Press any key to continue...") |
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47 | print "Now select a start and end point by clicking on the middle plot" |
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48 | print "Start point ..." |
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49 | flagstart = int(ginput(show_clicks=False)[0][0]+0.5) |
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50 | print "End point ..." |
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51 | flagend = int(ginput(show_clicks=False)[0][0]+0.5) |
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52 | xfft = range(len(yfft)) |
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53 | self.fftaxes.axvspan(flagstart, flagend, alpha=0.3) |
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54 | yfft[flagstart:flagend] = 0+0j |
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55 | yfft[-flagend:-flagstart] = 0+0j |
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56 | yi = ifft(yfft) |
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57 | self.resultaxes.plot(x, yi) |
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58 | self.figure.show() |
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59 | inp = raw_input("Commit flags (c), keep (k) or ignore(i)? ")\ |
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60 | .lower() |
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61 | if inp.startswith("c"): |
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62 | self.flags.append([flagstart, flagend]) |
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63 | self._scan.set_spectrum(yi.real, i) |
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64 | elif inp.startswith("k"): |
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65 | self.flags.append([flagstart, flagend]) |
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66 | else: |
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67 | del self.fftaxes.patches[-1] |
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68 | cont = raw_input("Continue (c) or quit (q)? ") |
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69 | if not cont == "c": |
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70 | return self.flags |
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71 | return self.flags |
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