Mercurial Hosting > traffic-intelligence

comparison trafficintelligence/storage.py @ 1095:e53c6e87bb3f

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update pems loader
author Nicolas Saunier <nicolas.saunier@polymtl.ca>
date Wed, 06 Feb 2019 12:55:10 -0500
parents 3939ae415be0
children 3972d85e3b6c
comparison
equal deleted inserted replaced
1094:c96388c696ac 1095:e53c6e87bb3f
975 yield line 975 yield line
976 976
977 def loadPemsTraffic(filename): 977 def loadPemsTraffic(filename):
978 '''Loads traffic data downloaded from the http://pems.dot.ca.gov clearinghouse 978 '''Loads traffic data downloaded from the http://pems.dot.ca.gov clearinghouse
979 into pandas dataframe''' 979 into pandas dataframe'''
980 f = utils.openCheck(filename) 980 data=read_csv(filename, nrows = 3)
981 l = f.readline().strip() 981 headerNames = ['time', 'station', 'district', 'freeway', 'direction', 'lanetype', 'length', 'nsamples', 'pctobserved', 'totalflow', 'occupancy', 'speed'] # default for 5 min
982 items = l.split(',') 982 nLanes = int((len(data.columns)-len(headerNames))/5)
983 headers = ['time', 'station', 'district', 'route', 'direction', 'lanetype', 'length', 'nsamples', 'pctobserved', 'flow', 'occupancy', 'speed', 'delay35', 'delay40', 'delay45', 'delay50', 'delay55', 'delay60'] 983 for i in range(1, nLanes+1):
984 nLanes = (len(items)-len(headers))/3 984 headerNames += ['nsamples{}'.format(i), 'flow{}'.format(i), 'occupancy{}'.format(i), 'speed{}'.format(i), 'pctobserved{}'.format(i)]
985 for i in range(nLanes): 985 return read_csv(filename, names = headerNames)
986 headers += ['flow{}'.format(i+1), 'occupancy{}'.format(i+1), 'speed{}'.format(i+1)] 986
987 f.close()
988 return read_csv(filename, delimiter = ',', names = headers)
989
990 def generatePDLaneColumn(data): 987 def generatePDLaneColumn(data):
991 data['LANE'] = data['LANE\\LINK\\NO'].astype(str)+'_'+data['LANE\\INDEX'].astype(str) 988 data['LANE'] = data['LANE\\LINK\\NO'].astype(str)+'_'+data['LANE\\INDEX'].astype(str)
992 989
993 def convertTrajectoriesVissimToSqlite(filename): 990 def convertTrajectoriesVissimToSqlite(filename):
994 '''Relies on a system call to sqlite3 991 '''Relies on a system call to sqlite3