Mercurial Hosting > traffic-intelligence
comparison python/utils.py @ 837:e01cabca4c55
minor modifications to merge-features
author | Nicolas Saunier <nicolas.saunier@polymtl.ca> |
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date | Wed, 06 Jul 2016 10:58:18 -0400 |
parents | 10dbab1e871d |
children | 15a82ebc62c4 |
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836:7058a40a4bbc | 837:e01cabca4c55 |
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235 '''Returns the media of Y's corresponding to X's in the interval [x-halfwidth, x+halfwidth]''' | 235 '''Returns the media of Y's corresponding to X's in the interval [x-halfwidth, x+halfwidth]''' |
236 return median([y for observedx, y in zip(X,Y) if abs(x-observedx)<halfwidth]) | 236 return median([y for observedx, y in zip(X,Y) if abs(x-observedx)<halfwidth]) |
237 | 237 |
238 def argmaxDict(d): | 238 def argmaxDict(d): |
239 return max(d, key=d.get) | 239 return max(d, key=d.get) |
240 | |
241 def deltaFrames(t1, t2, frameRate): | |
242 '''Returns the number of frames between t1 and t2 | |
243 positive if t1<=t2, negative otherwise''' | |
244 if t1 > t2: | |
245 return -(t1-t2).seconds*frameRate | |
246 else: | |
247 return (t2-t1).seconds*frameRate | |
240 | 248 |
241 def framesToTime(nFrames, frameRate, initialTime = time()): | 249 def framesToTime(nFrames, frameRate, initialTime = time()): |
242 '''returns a datetime.time for the time in hour, minutes and seconds | 250 '''returns a datetime.time for the time in hour, minutes and seconds |
243 initialTime is a datetime.time''' | 251 initialTime is a datetime.time''' |
244 seconds = int(floor(float(nFrames)/float(frameRate))+initialTime.hour*3600+initialTime.minute*60+initialTime.second) | 252 seconds = int(floor(float(nFrames)/float(frameRate))+initialTime.hour*3600+initialTime.minute*60+initialTime.second) |