def test_num_limit(file_name, min_num, max_num, optimal_sigma, velocity_sigma):
show_track.show_track(file_name)
# data = Utility.read_data_file(file_name) # 注意修改数据文件时要修改读文件程序
data = Utility.read_geolife_data_file(file_name)
compressed_data = Utility.data_preprocessing(data)
dist_2_array = Utility.calculate_dist_2_array(compressed_data)
dfc.normalize_point_velocity(compressed_data) # 速度归一化
velocity_list = [point.velocity for point in compressed_data]
compare_num_limit(min_num, max_num, dist_2_array, velocity_list,
optimal_sigma, velocity_sigma, compressed_data)
def test_distance_sigma(file_name, min_sigma, max_sigma, velocity_sigma,
num_limit):
show_track.show_track(file_name)
# data = Utility.read_data_file(file_name) # 注意修改数据文件时要修改读文件程序
data = Utility.read_geolife_data_file(file_name)
compressed_data = Utility.data_preprocessing(data)
dist_2_array = Utility.calculate_dist_2_array(compressed_data)
dfc.normalize_point_velocity(compressed_data) # 速度归一化
# velocity_list = [point.velocity for point in compressed_data]
# compare_distance_sigma(min_sigma, max_sigma, dist_2_array, velocity_list, velocity_sigma, num_limit)
stability_list = Utility.calculate_stability(compressed_data,
num_limit) #采用距离方差的方法
compare_distance_sigma(min_sigma, max_sigma, dist_2_array, stability_list,
velocity_sigma, num_limit)
def get_poi(data):
result = []
if len(data) > 500:
compressed_data = Utility.data_preprocessing(data)
num_limit = 51
dist_2_array = Utility.calculate_dist_2_array(compressed_data)
dist_2_array_copy = []
for arr in dist_2_array: # 备份起来，最后的优化处理会用到
arr_list = []
for ele in arr:
arr_list.append(ele)
dist_2_array_copy.append(arr_list)
partial_dist_list = Utility.calculate_partial_dist(dist_2_array, num_limit)
Utility.normalize_dist_array(dist_2_array, partial_dist_list)
optimal_sigma = 0.3
dfc.normalize_point_velocity(data)
velocity_list = [point.velocity for point in compressed_data]
potential_list = Utility.calculate_potential_value(dist_2_array, velocity_list, optimal_sigma, num_limit)
temp_potential_list = []
for i in range(len(potential_list)):
temp_potential_list.append(potential_list[i])
potential_threshold = dfc.calculate_potential_threshold(temp_potential_list)
dfc.refresh_dist_array(compressed_data, dist_2_array)
density_dist_list = dfc.calculate_density_distance(dist_2_array, potential_list)
dfc.add_attributes(compressed_data, potential_list, density_dist_list)
temp_distance = []
for i in range(len(density_dist_list)):
temp_distance.append(density_dist_list[i])
dist_threshold = dfc.calculate_dist_threshold(temp_distance)
centre_potential = []
centre_dist = []
centre_index_list = []
if potential_threshold > 0 and dist_threshold > 0:
for i in range(len(density_dist_list)):
if potential_list[i] > potential_threshold and density_dist_list[i] > dist_threshold:
centre_potential.append(potential_list[i])
centre_dist.append(density_dist_list[i])
centre_index_list.append(i)
else:
print 'there are something wrong with the threshold'
# stop_point_list = dfc.get_stop_position(compressed_data, centre_index_list)
centre_index_merge = dfc.merge_stop_position(dist_2_array_copy, centre_index_list, potential_list)
new_centre_index_list = dfc.refine_stop_position(dist_2_array_copy, centre_index_merge, compressed_data)
new_stop_point_list = dfc.get_stop_position(compressed_data, new_centre_index_list)
result = new_stop_point_list
return result
def main(file_name):
start_time = time.time()
show_track.show_track(file_name)
# data = Utility.read_data_file(file_name) # 注意修改数据文件时要修改读文件程序
# data = Utility.read_geolife_data_file(file_name)
data = Utility.read_own_data_file(file_name)
compressed_data = Utility.data_preprocessing(data)
# 绘制预处理后的轨迹图
pl.figure(figsize=Utility.figure_size)
x = [point.lon for point in compressed_data]
y = [point.lat for point in compressed_data]
l1 = pl.plot(x, y, 'og')
pl.setp(l1, markersize=3)
pl.xlabel("longitude")
pl.ylabel("latitude")
pl.show()
# 计算距离矩阵，同时得到轨迹点的速度特征
num_limit = 101
dist_2_array = Utility.calculate_dist_2_array(compressed_data)
dist_2_array_copy = []
for arr in dist_2_array: # 备份起来，最后的优化处理会用到
arr_list = []
for ele in arr:
arr_list.append(ele)
dist_2_array_copy.append(arr_list)
# 归一化距离矩阵
partial_dist_list = Utility.calculate_partial_dist(dist_2_array, num_limit)
Utility.normalize_dist_array(dist_2_array, partial_dist_list)
optimal_sigma = 0.3
velocity_sigma = 0.5
print '*' * 20 + 'the optimal sigma is '
print optimal_sigma
dfc.normalize_point_velocity(compressed_data) # 速度归一化，速度在此进行了平滑
velocity_list = [point.velocity for point in compressed_data]
# potential_list = calculate_optimal_potential(dist_2_array, velocity_list, num_limit) # 画出sigma图
potential_list = Utility.calculate_potential_value(dist_2_array,
velocity_list,
optimal_sigma,
velocity_sigma,
num_limit)
# 备份
temp_potential_list = []
for i in range(len(potential_list)):
temp_potential_list.append(potential_list[i])
# 归一化
# max_potential = max(potential_list)
# for i in range(len(potential_list)):
# potential_list[i] /= max_potential
# 画未归一化的密度序列图（未排序）
xx = [float(i) / len(compressed_data) for i in range(len(compressed_data))]
pl.figure(figsize=Utility.figure_size)
pl.plot(xx, potential_list, linewidth=Utility.line_width)
pl.xlabel('x')
pl.ylabel('density')
pl.title('density sequence before smooth')
pl.show()
# 画出potential的统计图 采用备份数据，函数里面需要排序
potential_threshold = dfc.calculate_potential_threshold(
temp_potential_list)
# 更新距离矩阵，加入时间距离
# dfc.refresh_dist_array(compressed_data, dist_2_array)
density_dist_list = dfc.calculate_density_distance(
dist_2_array, potential_list) # 画出distance图
# 画出距离曲线
xx = range(len(compressed_data))
pl.plot(xx, density_dist_list)
pl.title('distance sequence')
pl.show()
dfc.add_attributes(compressed_data, potential_list,
density_dist_list) # 完善了数据的potential和dist 属性
temp_distance = []
for i in range(len(density_dist_list)):
temp_distance.append(density_dist_list[i])
dist_threshold = dfc.calculate_dist_threshold(temp_distance)
print 'potential threshold'
print potential_threshold
print 'distance threshold'
print dist_threshold
centre_potential = []
centre_dist = []
centre_index_list = [] # 直接存放聚类中心点
if potential_threshold > 0 and dist_threshold > 0:
for i in range(len(density_dist_list)):
if potential_list[i] > potential_threshold and density_dist_list[
i] > dist_threshold:
centre_potential.append(potential_list[i])
centre_dist.append(density_dist_list[i])
centre_index_list.append(i)
# pl.plot(centre_potential, centre_dist, 'or', label='centre_point')
print 'centre potential'
print centre_potential
print 'centre_dist'
print centre_dist
else:
print 'there are something wrong with the threshold'
# 画出potential_distance图
#
# 结果显示
pl.plot(potential_list, density_dist_list, 'ob')
pl.plot(centre_potential, centre_dist, 'oy')
pl.xlabel('density')
pl.ylabel('distance')
pl.show()
# result_index_list = dfc.result_improvement(compressed_data, num_limit, centre_index_list)
# dfc.result_show(data, compressed_data, result_index_list)
stop_point_list = dfc.get_stop_position(compressed_data, centre_index_list)
dfc.result_show(data, stop_point_list)
for point in stop_point_list:
print str(point.lon) + ', ' + str(point.lat) + ', ' + \
time.strftime("%Y-%m-%d %H:%M:%S", time.localtime(point.time / float(1000)))
print '*' * 20 + 'after merge....'
centre_index_merge = dfc.merge_stop_position(dist_2_array_copy,
centre_index_list,
potential_list)
# new_centre_index_list = dfc.refine_stop_position(dist_2_array_copy, centre_index_merge, compressed_data)
new_stop_point_list = dfc.get_stop_position(compressed_data,
centre_index_merge)
# *******************************
# 画经过提纯处理后的decision graph
# new_centre_potential = []
# new_centre_dist = []
# for index in new_centre_index_list:
# new_centre_potential.append(potential_list[index])
# new_centre_dist.append(density_dist_list[index])
# plt.figure(figsize=Utility.figure_size)
# pl.plot(potential_list, density_dist_list, 'ob')
# pl.plot(new_centre_potential, new_centre_dist, 'oy')
# pl.xlabel('density')
# pl.ylabel('distance')
# pl.show()
# ******************************
end_time = time.time()
print u'程序总共运行时间：%f秒' % (end_time - start_time)
dfc.result_show(data, new_stop_point_list)
for point in new_stop_point_list:
print str(point.lon) + ', ' + str(point.lat) + ', ' + \
time.strftime("%Y-%m-%d %H:%M:%S", time.localtime(point.time / float(1000)))
def main(file_name):
start_time = time.time()
show_track.show_track(file_name)
data = Utility.read_data_file(file_name) # 注意修改数据文件时要修改读文件程序
# data = Utility.read_geolife_data_file(file_name)
compressed_data = Utility.data_preprocessing(data)
'''
# 绘制压缩后的轨迹点
pl.figure(figsize=Utility.figure_size)
x = [point.lon for point in compressed_data]
y = [point.lat for point in compressed_data]
l1 = pl.plot(x, y, 'og')
pl.setp(l1, markersize=3)
pl.xlabel("longitude")
pl.ylabel("latitude")
pl.show()
'''
num_limit = 51
dist_2_array = Utility.calculate_dist_2_array(compressed_data)
dist_2_array_copy = []
for arr in dist_2_array: # 备份起来，最后的优化处理会用到
arr_list = []
for ele in arr:
arr_list.append(ele)
dist_2_array_copy.append(arr_list)
partial_dist_list = Utility.calculate_partial_dist(dist_2_array, num_limit)
Utility.normalize_dist_array(dist_2_array, partial_dist_list)
max_partial_dist = max(partial_dist_list)
optimal_sigma = 0.3
velocity_sigma = 0.5
'''
print '*' * 20 + 'the optimal sigma is '
print optimal_sigma
print 'the max partial dist is '
print max_partial_dist
'''
dfc.normalize_point_velocity(compressed_data) # 速度归一化
velocity_list = [point.velocity for point in compressed_data]
potential_list = Utility.calculate_potential_value(dist_2_array,
velocity_list,
optimal_sigma,
velocity_sigma,
num_limit)
# 备份
temp_potential_list = []
for i in range(len(potential_list)):
temp_potential_list.append(potential_list[i])
'''
# 画未归一化的密度序列图（未排序）
xx = [float(i)/len(compressed_data) for i in range(len(compressed_data))]
pl.figure(figsize=Utility.figure_size)
pl.plot(xx, potential_list, linewidth=Utility.line_width)
pl.xlabel('x')
pl.ylabel('density')
pl.show()
'''
# 画出potential的统计图 采用备份数据，函数里面需要排序
potential_threshold = dfc.calculate_potential_threshold(
temp_potential_list)
# 更新距离矩阵，加入时间距离
dfc.refresh_dist_array(compressed_data, dist_2_array)
# 计算每个聚类点的距离特征；
density_dist_list = dfc.calculate_density_distance(
dist_2_array, potential_list) # 画出distance图
'''
xx = range(len(compressed_data))
pl.plot(xx, density_dist_list)
pl.show()
'''
dfc.add_attributes(compressed_data, potential_list,
density_dist_list) # 完善了数据的potential和dist 属性
temp_distance = []
for i in range(len(density_dist_list)):
temp_distance.append(density_dist_list[i])
dist_threshold = dfc.calculate_dist_threshold(temp_distance)
# ************直接画出聚类2016.10.27*******************************
cluster_points = dfc.get_cluster_points(compressed_data,
potential_threshold)
cluster_lon = [point.lon for point in cluster_points]
cluster_lat = [point.lat for point in cluster_points]
# 获得所有的聚类
cluster_list = []
is_next_cluster = False
cluster = []
for i in range(len(cluster_points) - 1):
if i == (len(cluster_points) - 4):
print 'why'
cluster.append(cluster_points[i])
# 如果需要分成下一个聚类，则要重新定义一个元组
if is_next_cluster:
cluster_list.append(cluster)
cluster = []
distance = Utility.distance_calculate(cluster_points[i],
cluster_points[i + 1])
time_interval = cluster_points[i + 1].time - cluster_points[i].time
# 聚类之间的距离阈值为200米，时间间隔阈值为30分钟
if distance > 800 or time_interval > 30 * 60 * 1000:
is_next_cluster = True
else:
is_next_cluster = False
cluster_list.append(cluster)
# comp_file = open(u"D:\Python\PaperPy\DataOperation\compress.txt", 'w')
# for point in compressed_data:
# comp_file.write(str(point.lon) + ' ' + str(point.lat) + ' ' + str(point.time) + '\n')
# comp_file.close()
# cluster_file = open(u"D:\Python\PaperPy\DataOperation\cluster.txt", 'w')
# for point in cluster_points:
# cluster_file.write(str(point.lon) + ' ' + str(point.lat) + ' ' + str(point.time) + '\n')
# cluster_file.close()
# 绘制压缩后的轨迹点
pl.figure(figsize=Utility.figure_size)
# x = [point.lon for point in compressed_data]
# y = [point.lat for point in compressed_data]
# l1 = pl.plot(x, y, 'og')
# pl.setp(l1, markersize=3)
pl.xlabel("longitude")
pl.ylabel("latitude")
colors = ['or', 'ok', 'ob']
for i in range(len(cluster_list)):
lon = []
lat = []
for j in range(len(cluster_list[i])):
lon.append(cluster_list[i][j].lon)
lat.append(cluster_list[i][j].lat)
pl.plot(lon, lat, colors[i % len(colors)])
pl.show()