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annotate plotss.py @ 35:eaee6ea8d14e

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Add experiment to look at the FM band. Put start/stop frequency in the filename.
author Daniel O'Connor <darius@dons.net.au>
date Wed, 28 Sep 2011 09:21:31 +0930
parents e80c2ff5fa87
children ff63d71e1383
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e80c2ff5fa87 Add program to plot data files from sitesurvey.py
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1 #!/usr/bin/env python
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2
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3 import exceptions
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4 import numpy
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5 import pylab
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6 import sys
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7
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8 def doplot(fname):
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9 f = file(fname)
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10 opts = {}
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11 for line in f:
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12 key, value = line.strip().split(' ', 1)
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13 try:
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14 opts[key] = int(value)
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15 except exceptions.ValueError, e:
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16 try:
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17 opts[key] = float(value)
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18 except exceptions.ValueError, e:
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19 opts[key] = value
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20
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21 xdata = numpy.fromstring(opts['XDATA'], sep = ', ')
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22 ydata = numpy.fromstring(opts['YDATA'], sep = ', ')
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23 xdata /= 1e6
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24 pylab.title("Tag \'" + opts['TAG'] + "\' at " + opts['TIMESTAMP'])
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25 pylab.xlabel("Frequency (MHz)")
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26 pylab.ylabel("Level (dBm)")
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27 annstr = "FStart\t%.2f MHz\nFStop\t%.2f MHz\nPoints\t%d" % (
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28 float(opts['FSTART']) / 1e6,
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29 float(opts['FSTOP']) / 1e6,
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30 len(xdata))
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31 pylab.annotate(annstr, xy=(5, -40), xycoords='axes points')
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33 annstr = "Video BW\t%.1f kHz\nResol. BW\t%.1f kHz\nAttenuation\t%.1f dB\nRef Level\t%.1f dBm" % (
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34 float(opts['VIDBW']) / 1e3,
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35 float(opts['RESBW']) / 1e3,
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36 float(opts['ATTEN']),
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37 float(opts['REFLEV']))
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38 pylab.annotate(annstr, xy=(-140, -55), xycoords='axes points')
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39 pylab.grid(True)
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40 pylab.plot(xdata, ydata, linestyle='solid', marker='.')
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41 pylab.show()
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42
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43 if __name__ == "__main__":
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44 if len(sys.argv) < 2:
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45 print "Need at least one file to plot"
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46 sys.exit(1)
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47
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48 for fn in sys.argv[1:]:
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49 doplot(fn)
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