Ejemplo n.º 1
0
def create_csv_from_choice_sets(choice_sets,trip_ids,pathname,linkname):
	"""create two linked csv tables containing path links and path ids for viewing in GIS"""
	
	linkfile=open(linkname,'w')
	link_writer=csv.writer(linkfile,lineterminator='\r')
	
	pathfile=open(pathname,'w')
	path_writer=csv.writer(pathfile,lineterminator='\r')
	
	link_writer.writerow(['link_id','occ_id','trip_id','path_id','a','b'])
	path_writer.writerow(['occ_id','trip_id','path_id','orig','dest'])
	
	for k in range(len(choice_sets)):
		curset=choice_sets[k]
		for i in range(len(curset)):
			prelimpath=curset[i]
			if type(prelimpath[1])==type((1,2)):
				curpath=get_orig_path(prelimpath)
			else:
				curpath=prelimpath
			path_writer.writerow([str(k),trip_ids[k],str(i),curpath[0],curpath[-1]])
			for j in range(len(curpath)-1):
				link_writer.writerow([str(j),str(k),trip_ids[k],str(i),curpath[j],curpath[j+1]])
	
	linkfile.close() 
	pathfile.close()
Ejemplo n.º 2
0
def create_csv_from_choice_sets(choice_sets, trip_ids, pathname, linkname):
    """create two linked csv tables containing path links and path ids for viewing in GIS"""

    linkfile = open(linkname, 'w')
    link_writer = csv.writer(linkfile, lineterminator='\r')

    pathfile = open(pathname, 'w')
    path_writer = csv.writer(pathfile, lineterminator='\r')

    link_writer.writerow(['link_id', 'occ_id', 'trip_id', 'path_id', 'a', 'b'])
    path_writer.writerow(['occ_id', 'trip_id', 'path_id', 'orig', 'dest'])

    for k in range(len(choice_sets)):
        curset = choice_sets[k]
        for i in range(len(curset)):
            prelimpath = curset[i]
            if type(prelimpath[1]) == type((1, 2)):
                curpath = get_orig_path(prelimpath)
            else:
                curpath = prelimpath
            path_writer.writerow(
                [str(k), trip_ids[k],
                 str(i), curpath[0], curpath[-1]])
            for j in range(len(curpath) - 1):
                link_writer.writerow([
                    str(j),
                    str(k), trip_ids[k],
                    str(i), curpath[j], curpath[j + 1]
                ])

    linkfile.close()
    pathfile.close()
Ejemplo n.º 3
0
def path_size(G, choice_sets, choice_set_config):

    result = []
    config = choice_set_config

    the_network = G
    if G.orig_network is not None:
        the_network = G.orig_network

    for path_list in choice_sets:

        temp = []

        hashes = []
        lengths = []
        for cur_path in path_list:
            use_path = cur_path
            if G.orig_network is not None:
                use_path = get_orig_path(cur_path)
            cur_hash = {}
            cur_length = 0
            for i in range(len(use_path) - 1):
                cur_hash[(use_path[i], use_path[i + 1])] = the_network[
                    use_path[i]][use_path[i + 1]][config['overlap_var']]
                cur_length = cur_length + cur_hash[(use_path[i],
                                                    use_path[i + 1])]
            hashes.append(cur_hash)
            lengths.append(cur_length)
        min_length = min(lengths)

        for i in range(len(path_list)):
            PS = 0
            for a in hashes[i]:
                delta_sum = 0
                for j in range(len(path_list)):
                    if a in hashes[j]:
                        delta_sum = delta_sum + min_length / lengths[j]
                PS = PS + hashes[i][a] / lengths[i] / delta_sum
            temp.append(PS)

        result.append(temp)

    return result
Ejemplo n.º 4
0
def path_size(G,choice_sets,choice_set_config):
	
	result=[]
	config=choice_set_config
	
	the_network=G
	if G.orig_network is not None:
		the_network=G.orig_network
	
	for path_list in choice_sets:
		
		temp=[]
		
		hashes=[]; lengths=[]
		for cur_path in path_list:
			use_path=cur_path
			if G.orig_network is not None:
				use_path=get_orig_path(cur_path)
			cur_hash={}
			cur_length=0
			for i in range(len(use_path)-1):
				cur_hash[(use_path[i],use_path[i+1])]=the_network[use_path[i]][use_path[i+1]][config['overlap_var']]
				cur_length=cur_length+cur_hash[(use_path[i],use_path[i+1])]
			hashes.append(cur_hash)
			lengths.append(cur_length)
		min_length=min(lengths)

		for i in range(len(path_list)):
			PS=0
			for a in hashes[i]:
				delta_sum=0
				for j in range(len(path_list)):
					if a in hashes[j]:
						delta_sum=delta_sum+min_length/lengths[j]
				PS=PS+hashes[i][a]/lengths[i]/delta_sum
			temp.append(PS)
		
		result.append(temp)
		
	return result