def readFile(self, filename):
'''
This file reads an aggregated file, and return
1. duid mapping (from duid to an integer, indicates the row number in the sparse matrix);
2. pid mapping (from pid to an integer, indicates the column number in the sparse matrix);
3. core sparse matrix.
Note: this method pops data for ALL users.
'''
mapping_duid = {}
# store duid->row# mapping
mapping_pid = {}
# store pid->col# mapping
row = []
col = []
data = []
lineNum = 0
with open(filename, 'rb') as csvfile:
logreader = csv.reader(csvfile,
delimiter=self.fieldDelimiter,
quotechar='|')
for logrow in logreader:
log_duid = logrow[self.fieldMapping['duid']]
log_pid = logrow[self.fieldMapping['pid']]
log_watchtime = int(logrow[self.fieldMapping['watchtime']])
if not (log_duid in mapping_duid):
mapping_duid[log_duid] = len(mapping_duid)
row.append(mapping_duid[log_duid])
if not (log_pid in mapping_pid):
mapping_pid[log_pid] = len(mapping_pid)
col.append(mapping_pid[log_pid])
data.append(log_watchtime)
lineNum += 1
if self.verbose and (lineNum % self.display == 0):
Logger.Log(str(lineNum) + ' lines read.')
if (self.verbose):
Logger.Log('Done reading agg log file. '+str(len(data)) + ' elements read'+ \
' ( '+str(len(mapping_duid))+' row/user, '+str(len(mapping_pid))+' col/program).')
#return [mapping_duid, mapping_pid, row, col, data];
result = FeedbackData(row, col, data, len(mapping_duid), len(mapping_pid),\
mapping_duid, mapping_pid, [])
return result
def read_file_info(self, filename):
'''
This file reads an aggregated file and get summary (occurrences)
for program and device. This information can be used to filtered
out programs/devices later.
'''
occur_duid = {}
occur_pid = {}
# turn a single file into a file list.
if not isinstance(filename, list):
filename_arr = [filename]
else:
filename_arr = filename
lineNum = 0
for filename in filename_arr:
with open(filename, 'rb') as csvfile:
logreader = csv.reader(csvfile,
delimiter=self.fieldDelimiter,
quotechar='|')
for logrow in logreader:
log_duid = logrow[self.fieldMapping['duid']]
log_pid = logrow[self.fieldMapping['pid']]
if not (log_duid in occur_duid):
occur_duid[log_duid] = 1
else:
occur_duid[log_duid] += 1
if not (log_pid in occur_pid):
occur_pid[log_pid] = 1
else:
occur_pid[log_pid] += 1
lineNum += 1
if self.verbose and (lineNum % self.display == 0):
Logger.Log(str(lineNum) + ' lines read.')
# count occurrence into bins.
cnt_duid = {}
# cnt_duid[number of occurrence] = number of duid with specific occurrence.
for val in occur_duid.values():
if not (val in cnt_duid):
cnt_duid[val] = 1
else:
cnt_duid[val] += 1
cnt_pid = {}
# cnt_duid[number of occurrence] = number of duid with specific occurrence.
for val in occur_pid.values():
if not (val in cnt_pid):
cnt_pid[val] = 1
else:
cnt_pid[val] += 1
return [occur_duid, occur_pid, cnt_duid, cnt_pid]
def read_file_with_id_list(self, filename, duidlist, pidlist):
'''
This file reads an aggregated file.
The file only include the specified duid and pid.
'''
mapping_duid = {}
# store duid->row# mapping
mapping_pid = {}
# store pid->col# mapping
row = []
col = []
data = []
lineNum = 0
# turn a single file into a file list.
if not isinstance(filename, list):
filename_arr = [filename]
else:
filename_arr = filename
for filename in filename_arr:
with open(filename, 'rb') as csvfile:
logreader = csv.reader(csvfile,
delimiter=self.fieldDelimiter,
quotechar='|')
for logrow in logreader:
log_duid = logrow[self.fieldMapping['duid']]
log_pid = logrow[self.fieldMapping['pid']]
## we need both duid and pid are in the list.
if (log_duid in duidlist) and (log_pid in pidlist):
log_watchtime = int(
logrow[self.fieldMapping['watchtime']])
if not (log_duid in mapping_duid):
mapping_duid[log_duid] = len(mapping_duid)
row.append(mapping_duid[log_duid])
if not (log_pid in mapping_pid):
mapping_pid[log_pid] = len(mapping_pid)
col.append(mapping_pid[log_pid])
data.append(log_watchtime)
lineNum += 1
if self.verbose and (lineNum % self.display == 0):
print str(lineNum), ' lines read.'
if (self.verbose):
Logger.Log('Done reading agg log file. '+str(len(data)) + ' elements read'+ \
' ( '+str(len(mapping_duid))+' row/user, '+str(len(mapping_pid))+' col/program).')
return [mapping_duid, mapping_pid, row, col, data]
def experiment_future_program(exp_name, previous_data_files, future_data_file, \
min_occ_user, min_occ_prog, method_list, top_k):
'''
experiment entrance for future programs.
Top-k precision.
Parameters
----------
exp_name: a human-readable experiment name.
method_list: a list of recommendation models
Returns
----------
'''
# define mcpl_log style.
mcpl_log = lambda msg: Logger.Log(msg, Logger.MSG_CATEGORY_EXP)
exp_id = exp_name + '_mu' + str(min_occ_user) + '_mp' + str(min_occ_prog)
mcpl_log('Experimental ID: ' + exp_id)
reader = DailyWatchTimeReader()
tr_data = reader.read_file_with_minval(previous_data_files, min_occ_user,
min_occ_prog)
te_data = reader.read_file_with_minval(future_data_file, min_occ_user,
min_occ_prog)
mcpl_log('Normalization data ...')
tr_data.normalize_row()
# there is no need to normalize train data because we evaluate the hits.
result = {}
for method in method_list:
# do for each method
mcpl_log('Method: ' + method.unique_str())
method_result = experiment_unit_future_program(exp_id, method, tr_data,
te_data, top_k)
result[method.unique_str()] = method_result
mcpl_log('Experiment Done [' + exp_id + ']')
return result
def __init__(self, cache_folder=None, use_cache=None):
'''
Create a cache manager with the specified cache location.
'''
# if cache is system is used.
# if turned off then save/load/check resource will not do anything.
config_use_cache = ConfigManager.GetBoolean(CFG_SEC_UTILS,
CFG_UTILS_USECACHE)
self.use_cache = config_use_cache if use_cache is None else use_cache
if not self.use_cache:
Logger.Log("URM is turned off. All cached resources are not available.", \
Logger.MSG_CATEGORY_SYSTEM)
# set up the directory for cache.
config_cache_folder = ConfigManager.Get(CFG_SEC_UTILS,
CFG_UTILS_CACHEFOLDER)
self.cache_folder = config_cache_folder if cache_folder is None else cache_folder
# create directory if it does not exist
self.cacheLocation = self.cache_folder
if not os.path.exists(self.cacheLocation):
os.makedirs(self.cacheLocation)
def experiment_unit_rand_split(exp_id, method, tr_data, te_data, iteration):
'''
One iteration of training and testing. The experimental ID
'''
# define mcpl_log style.
mcpl_log = lambda msg: Logger.Log(msg, Logger.MSG_CATEGORY_EXP)
result_resource_str = 'exp' + exp_id + \
'_method' + method.unique_str() + \
'_iter' + str(iteration)
sub_folder = exp_id + '/models/' + method.unique_str()
# use a sub folder to store the experiment resource.
# check resource for existing model.
trained_model = URM.LoadResource(URM.RTYPE_RESULT, result_resource_str,
sub_folder)
if not trained_model:
# train model using the training data.
# NOTE: this is the most time-consuming part.
mcpl_log('training models...')
method.train(tr_data)
# save resource
trained_model = [method]
URM.SaveResource(URM.RTYPE_RESULT, result_resource_str, trained_model,
sub_folder)
# compute performance on test data using the model.
[method] = trained_model
mcpl_log('computing evaluation metrics on the test data...')
eval_result = rmse(te_data.data_val,
method.predict(te_data.data_row, te_data.data_col))
return eval_result
def experiment_unit_leave_k_out(exp_id, method, data_tr, data_left, iteration,
top_n):
'''
This method works on the column/row index of the data_tr and data_left, and
the data_tr and data_left must be completely aligned in both row-wise and column-wise.
'''
# define lko_log style.
lko_log = lambda msg: Logger.Log(msg, Logger.MSG_CATEGORY_EXP)
result_resource_str = 'exp' + exp_id + \
'_method' + method.unique_str() + \
'_iter' + str(iteration)
sub_folder = exp_id + '/models/' + method.unique_str()
# use a sub folder to store the experiment resource.
# check resource for existing model.
trained_model = URM.LoadResource(URM.RTYPE_RESULT, result_resource_str,
sub_folder)
if not trained_model:
# train model using the training data.
# NOTE: this is the most time-consuming part.
lko_log('training models...')
method.train(data_tr)
# save resource
trained_model = [method]
URM.SaveResource(URM.RTYPE_RESULT, result_resource_str, trained_model,
sub_folder)
# compute performance on test data using the model.
[method] = trained_model
lko_log('computing evaluation metrics on the test data...')
eval_result = {}
# ranked list.
col_num = data_left.num_col
pred_col = range(col_num)
tr_data_csr = data_tr.get_sparse_matrix().tocsr()
lo_data_csr = data_left.get_sparse_matrix().tocsr()
for user_idx in range(data_left.num_row):
# predict the entire row.
#pred_row = [user_idx] * col_num;
#row_pred = method.predict(pred_row, pred_col);
row_pred = method.predict_row(user_idx, pred_col)
# rank the column (the result is a list of indices).
srt_col = [
k[0] for k in sorted(
enumerate(row_pred), key=lambda x: x[1], reverse=True)
]
# trained columns.
tr_col = set(np.nonzero(tr_data_csr[user_idx, :])[1].tolist())
# remove the trained column.
te_srt_col = [col_pos for col_pos in srt_col if col_pos not in tr_col]
# top - k (safeguard)
te_topk_col = te_srt_col[:min(top_n,
len(te_srt_col) - 1)]
# test column index;
lo_col = set(np.nonzero(lo_data_csr[user_idx, :])[1].tolist())
prec = precision_itemlist(te_topk_col, lo_col)
rec = recall_itemlist(te_topk_col, lo_col)
eval_result['prec'] = prec
eval_result['recall'] = rec
eval_result['rmse'] = rmse(
data_left.data_val,
method.predict(data_left.data_row, data_left.data_col))
return eval_result
def experiment_rand_split(exp_name, daily_data_file, min_occ_user, min_occ_prog, \
method_list, training_prec, total_iteration):
'''
Parameters
----------
exp_name: a human-readable experiment name.
method_list: a list of matrix completion models
Returns
----------
'''
# define mcpl_log style.
mcpl_log = lambda msg: Logger.Log(msg, Logger.MSG_CATEGORY_EXP)
#mcpl_log('Data ID: ' + hash(daily_data_file));
# here we use a regular hash.
exp_id = exp_name + '_data' +str(hash(daily_data_file)) + '_mu' + str(min_occ_user) + '_mp' + str(min_occ_prog) \
+ '_trprec' + str(training_prec) + '_toiter' + str(total_iteration)
mcpl_log('Experiment ID: ' + exp_id)
# save experiment splitting as resources.
reader = UtilityDataReader()
data = reader.read_file_with_minval(daily_data_file, min_occ_user,
min_occ_prog)
# we normalize here before splitting.
mcpl_log('Normalizing data...')
data.normalize_row()
result = {}
for method in method_list:
# do for each method
perf_vect = []
for iteration in range(total_iteration):
# do for each iteration for each method;
mcpl_log('Method: ' + method.unique_str() + ' Iteration: ' +
str(iteration))
# data split of the current iteration.
split_resource_str = 'exp' + exp_id + '_split_iter' + str(
iteration)
split_dir = exp_id + '/split'
split = URM.LoadResource(URM.RTYPE_RESULT, split_resource_str,
split_dir)
if not split:
split = ds.split(data.num_row, training_prec)
URM.SaveResource(URM.RTYPE_RESULT, split_resource_str, split,
split_dir)
[split_tr, split_te] = split
data_tr = data.subdata_row(split_tr)
data_te = data.subdata_row(split_te)
iter_result = experiment_unit_rand_split(exp_id, method, data_tr,
data_te, iteration)
perf_vect.append(iter_result)
result[method.unique_str()] = perf_vect
mcpl_log('Experiment Done [' + exp_id + ']')
return result
Created on Jan 31, 2014 @author: Shiyu C. ([email protected]) ''' import numpy as np; from rs.algorithms.recommendation.generic_recalg import CFAlg; from rs.utils.log import Logger; import scipy.sparse; import scipy.linalg # an encapsulated logger. log = lambda message: Logger.Log(CF_ONMTF.ALG_NAME + ':'+message, Logger.MSG_CATEGORY_ALGO); class CF_ONMTF(CFAlg): ''' A random guess recommender (demo). ''' ALG_NAME = 'CF_ONMTF'; ################################################################################################## def __init__(self, latent_factor = 20, lamb = 1e-3, stop_delta = 1e-4, maxiter = 1e3, verbose = False): ''' Constructor
'''
import numpy as np
import scipy.sparse
import scipy.linalg
#import timeit;
from rs.utils.log import Logger
from rs.algorithms.recommendation.generic_recalg import CFAlg
from rs.algorithms.optimization.prox import projfun_probability_simplex,\
proximal, proj_nonneg
from rs.algorithms.optimization.sparsa import Opt_SpaRSA
# an encapsulated logger.
log = lambda message: Logger.Log(HierLat.ALG_NAME + ':' + message, Logger.
MSG_CATEGORY_ALGO)
class HierLat(CFAlg):
'''
A random guess recommender (demo).
'''
ALG_NAME = 'HierLat'
CS_EQUAL_PROB = 'cs_equal_prob'
# equal probability
CS_ALL_AVG = 'cs_all_avg'
# all average and then normalize.
CS_OBS_AVG = 'cs_obs_avg'
# average at observe and then normalize.
def experiment_unit_leave_k_out_map(exp_id, method, data_tr, data_left, iteration, max_rank):
'''
This method works on the column/row index of the data_tr and data_left, and
the data_tr and data_left must be completely aligned in both row-wise and column-wise.
'''
# define lko_log style.
lko_log = lambda msg: Logger.Log(msg, Logger.MSG_CATEGORY_EXP);
result_resource_str = 'exp' + exp_id + \
'_method' + method.unique_str() + \
'_iter' + str(iteration);
sub_folder = exp_id + '/models/' + method.unique_str(); # use a sub folder to store the experiment resource.
# check resource for existing model.
trained_model = URM.LoadResource(URM.RTYPE_RESULT, result_resource_str, sub_folder);
if not trained_model:
# train model using the training data.
# NOTE: this is the most time-consuming part.
lko_log('training models...');
method.train(data_tr);
# save resource
trained_model = [method];
URM.SaveResource(URM.RTYPE_RESULT, result_resource_str, trained_model, sub_folder);
# compute performance on test data using the model.
[method] = trained_model;
lko_log('computing evaluation metrics on the test data...');
eval_result = {};
# ranked list.
col_num = data_left.num_col;
pred_col = range(col_num);
tr_data_csr = data_tr.get_sparse_matrix().tocsr();
lo_data_csr = data_left.get_sparse_matrix().tocsr();
perf_vect_prec = np.zeros(max_rank); # precision
perf_vect_rec = np.zeros(max_rank); # recall
perf_vect_hr = np.zeros(max_rank); # hit rate (Modification of Xia Ning's Paper)
for user_idx in range(data_left.num_row):
# predict the entire row.
# test column index;
lo_col = set(np.nonzero(lo_data_csr[user_idx, :])[1].tolist());
# there is no testing on this user.
if len(lo_col) == 0:
continue;
#pred_row = [user_idx] * col_num;
#row_pred = method.predict(pred_row, pred_col);
row_pred = method.predict_row(user_idx, pred_col);
# rank the column (the result is a list of indices).
srt_col = [k[0] for k in sorted(enumerate(row_pred), key=lambda x:x[1], reverse=True)];
# trained columns.
tr_col = set(np.nonzero(tr_data_csr[user_idx, :])[1].tolist());
# remove the trained column from prediction.
# this contains a set of indices that predicted (excluding training items).
te_srt_col = [col_pos for col_pos in srt_col if col_pos not in tr_col];
#max_rank will result in an array of 0:max_rank-1;
hit = 0; # the hit variable keeps track of the number of hits till the current rank.
for rk in range(max_rank):
# if rk is greater than the length of te_srt_col, then continue;
# if not, detect possible hits.
# a hit is defined by items hits
if (rk < len(te_srt_col)) and (te_srt_col[rk] in lo_col):
hit += 1;
perf_vect_hr[rk] += float(hit)/len(lo_col); # hit rate
perf_vect_prec[rk] += float(hit)/(rk+1); # precision
perf_vect_rec[rk] += float(hit)/len(lo_col); # recall
#normalization over users.
perf_vect_hr = perf_vect_hr/data_left.num_row;
perf_vect_prec = perf_vect_prec/data_left.num_row;
perf_vect_rec = perf_vect_rec/data_left.num_row;
eval_result['hit_rate'] = perf_vect_hr;
eval_result['precision'] = perf_vect_prec;
eval_result['recall'] = perf_vect_rec;
eval_result['RMSE'] = rmse(data_left.data_val, method.predict(data_left.data_row, data_left.data_col));
return eval_result;
@author: Shiyu C. ([email protected]) Modified on Feb 5, 2014 by Jiayu Zhou, added Rec_LMaFit. ''' import numpy as np; from rs.algorithms.recommendation.generic_recalg import CFAlg; from rs.algorithms.recommendation.recommender_wrapper import Recommender; from rs.utils.log import Logger; import scipy.sparse import scipy.linalg # encapsulated loggers. mcpl_log = lambda message: Logger.Log(LMaFit.ALG_NAME + ':'+message, Logger.MSG_CATEGORY_ALGO); rec_log = lambda message: Logger.Log(Rec_LMaFit.ALG_NAME + ':'+message, Logger.MSG_CATEGORY_ALGO); class Rec_LMaFit(Recommender): ''' An implementation recommender wrapper using the LMaFit algorithm (with the capability of ensemble). ''' ALG_NAME = 'Rec_LMaFit'; def __init__(self, latent_factors = [1, 2], lamb = [1e-3, 1e-1], stop_delta = 1e-4, maxiter = 1e3, verbose = False): ''' Constructor. ''' self.models = []; for model_idx in range(len(latent_factors)):
def read_file_with_id_list(self, filename, duidlist, pidlist, ignore_prog_without_genre = True):
'''
This file reads an aggregated file.
The file only include the specified duid and pid.
'''
mapping_duid = {}; # store duid->row# mapping
mapping_pid = {}; # store pid->col# mapping
row = [];
col = [];
data = [];
pggr_pg = [];
pggr_gr = [];
visited_program_list = set([]);
lineNum = 0;
# turn a single file into a file list.
if not isinstance(filename, list):
filename_arr = [filename];
else:
filename_arr = filename;
for filename in filename_arr:
with open(filename, 'rb') as csvfile:
logreader = csv.reader(csvfile, delimiter = self.fieldDelimiter, quotechar = '|');
for logrow in logreader:
log_duid = logrow[self.fieldMapping['duid']];
log_pid = logrow[self.fieldMapping['pid']];
log_pg_gr = logrow[self.fieldMapping['genre']].strip();
if not log_pg_gr:
Logger.Log('Empty genre information for program '+log_pid, Logger.MSG_CATEGORY_DATA);
if ignore_prog_without_genre:
# ignore records whose program has no genre information.
continue;
## we need both duid and pid are in the list.
if (log_duid in duidlist) and (log_pid in pidlist):
log_watchtime = int(logrow[self.fieldMapping['watchtime']]);
if not (log_duid in mapping_duid):
mapping_duid[log_duid] = len(mapping_duid);
row.append(mapping_duid[log_duid]);
if not (log_pid in mapping_pid):
mapping_pid[log_pid] = len(mapping_pid);
col.append(mapping_pid[log_pid]);
# store program - genre mappings, for programs that were not visited before.
if not mapping_pid[log_pid] in visited_program_list:
for pg_gr in log_pg_gr.split(','):
if not pg_gr:
continue;
pggr_pg.append(mapping_pid[log_pid]);
pggr_gr.append(int(pg_gr));
visited_program_list.add(mapping_pid[log_pid]);
data.append(log_watchtime);
lineNum+=1;
if self.verbose and (lineNum%self.display == 0):
print str(lineNum), ' lines read.';
if (self.verbose):
Logger.Log('Done reading agg log file. '+str(len(data)) + ' elements read'+ \
' ( '+str(len(mapping_duid))+' row/user, '+str(len(mapping_pid))+' col/program).');
return [mapping_duid, mapping_pid, row, col, data, pggr_pg, pggr_gr];
def read_file_with_minval(self, filename, min_duid, min_pid, num_duid = None, num_pid = None, rand_seed = 1):
'''
This method first goes through the data once, and filter out
the device and program that has occurrences below specified values.
Support random undersampling.
Parameters
----------
@param filename: a string consists of the file name and location of the data file to be read.
@param min_duid: a positive integer. the minimum occurrence of a device for the device to be included.
@param min_pid: a positive integer. the minimum occurrence of a program for the program to be included.
Returns
----------
result: a FeedbackData data structure constructed from the data file. In the result there is also
a genre-program mapping data (result.meta['pggr_pg'][i], meta['pggr_pr'][i]) indicates that
the program at result.meta['pggr_pg'][i] is marked by genre at meta['pggr_pr'][i]. The genre
mapping is in R:/Data/Rovi/genre.csv, and a vintage copy is also kept in datasample/Rovi folder.
'''
if num_duid is None and num_pid is None:
subsample = False;
res_str = 'DWT_RFWMV[' + str(filename) + '][MIN DUID' + str(min_duid) + '][MIN PID' + str(min_pid) +']';
elif num_duid is not None and num_pid is not None:
subsample = True;
res_str = 'DWT_RFWMV[' + str(filename) + '][MIN DUID' + str(min_duid) + '][MIN PID' + str(min_pid) +']'\
+ '[NUM DUID' + str(num_duid) + ']' + '[NUM PID' + str(num_pid) + ']';
else:
raise ValueError('num_duid and num_pid should be both set or both use default');
# We check if the current resource is available. If not then load from test data and save resource.
if not URM.CheckResource(URM.RTYPE_DATA, res_str):
Logger.Log('Computing data information...');
[occur_duid, occur_pid, _, _] = self.read_file_info(filename);
print str(len(occur_duid)), 'devices', str(len(occur_pid)), 'programs';
Logger.Log('Generating filtering indices...');
duidlist = [sel_duid for sel_duid, sel_duidcnt in occur_duid.iteritems() if sel_duidcnt > min_duid];
pidlist = [sel_pid for sel_pid, sel_pidcnt in occur_pid.iteritems() if sel_pidcnt > min_pid];
print 'After filtering [MIN_DUID',str(min_duid), ' MIN_PID:', str(min_pid),']:',\
str(len(occur_duid)), 'devices', str(len(occur_pid)), 'programs';
# perform random sampling.
if subsample:
random.seed(rand_seed);
if len(duidlist) > num_duid:
# subsample DUID;
random.shuffle(duidlist);
duidlist = duidlist[:num_duid];
if len(pidlist) > num_pid:
# subsample PID;
random.shuffle(pidlist);
pidlist = pidlist[:num_pid];
duidlist = set(duidlist);
pidlist = set(pidlist);
# read the raw data file with the list.
[mapping_duid, mapping_pid, row, col, data, pggr_pg, pggr_gr] \
= self.read_file_with_id_list(filename, duidlist, pidlist);
Logger.Log('read_file_with_minval process completed.');
result = FeedbackData(row, col, data, len(mapping_duid), len(mapping_pid),\
mapping_duid, mapping_pid, {'pggr_pg': pggr_pg, 'pggr_gr': pggr_gr});
# save computed results to resource cache.
URM.SaveResource(URM.RTYPE_DATA, res_str, result);
return result;
else:
return URM.LoadResource(URM.RTYPE_DATA, res_str);
def log(msg):
'''
logging style.
'''
Logger.Log(msg, Logger.MSG_CATEGORY_CACHE)
def experiment_unit_future_program(exp_id, method, tr_data, te_data, top_k):
'''
'''
# define mcpl_log style.
mcpl_log = lambda msg: Logger.Log(msg, Logger.MSG_CATEGORY_EXP)
result_resource_str = 'model_exp' + exp_id + \
'_method' + method.unique_str()
sub_folder = exp_id + '/models/' + method.unique_str()
# use a sub folder to store the experiment resource.
# check resource for existing model.
trained_model = URM.LoadResource(URM.RTYPE_RESULT, result_resource_str,
sub_folder)
if not trained_model:
# train model using the training data.
# NOTE: this is the most time-consuming part.
mcpl_log('training models...')
method.train(tr_data)
# save resource
trained_model = [method]
URM.SaveResource(URM.RTYPE_RESULT, result_resource_str, trained_model,
sub_folder)
# compute performance on test data using the model.
[method] = trained_model
mcpl_log('computing evaluation metrics on the test data...')
# compute the score of the programs in the prediction.
prog_list = te_data.col_mapping.keys()
# program list
te_datamat = te_data.get_sparse_matrix().tolil()
eval_result = []
# TODO: on a subset of DUID?
for duid in te_data.row_mapping.keys(): # iterate every element.
prog_score = method.get_score(duid, prog_list, te_data.meta)
# get scores of the programs in the list.
# sort the score (first dimension is the index and the second is the actual prediction value).
# NOTE: the first dimension is the order with respect to prog_list
srt_list = [(k[0], k[1]) for k in sorted(
enumerate(prog_score), key=lambda x: x[1], reverse=True)]
srt_list = srt_list[:top_k]
# truncate to top k.
[srt_idx, _] = zip(*srt_list)
# map from prog_list to actual index.
mapped_srt_idx = [
te_data.col_mapping[prog_list[idx]] for idx in srt_idx
]
#print te_datamat[te_data.row_mapping[duid], mapped_srt_idx].todense();
# get the ground truth hit.
prog_hit = (te_datamat[te_data.row_mapping[duid],
mapped_srt_idx].todense().tolist())[0]
# compute hit precision (now we consider only binary hit).
eval_result.append(hit_prec(prog_hit))
return eval_result
''' Created on Feb 17, 2014 @author: Shiyu C. ([email protected]) ''' import numpy as np from rs.algorithms.recommendation.generic_recalg import CFAlg from rs.utils.log import Logger import scipy.sparse #import scipy.linalg # an encapsulated logger. log = lambda message: Logger.Log(item_item_sim.ALG_NAME + ':'+message, \ Logger.MSG_CATEGORY_ALGO) class item_item_sim(CFAlg): ALG_NAME = 'item_item_sim' def __init__(self, N=3): ''' Constructor ''' # initialize parameters. self.N = N log('Item-based similarity algorithm created: Neighborhood size' + str(self.N))
'''
Created on Feb 12, 2014
@author: jiayu.zhou
'''
from rs.algorithms.recommendation.generic_recalg import CFAlg
from rs.utils.log import Logger;
import numpy as np;
mcpl_log = lambda message: Logger.Log(SVDPlusPlus.ALG_NAME + ':'+message, Logger.MSG_CATEGORY_ALGO);
class SVDPlusPlus(CFAlg):
'''
SVD Plus Plus
'''
ALG_NAME = 'SVD++';
def __init__(self, params):
'''
Constructor
'''
self.regularization = 0.015;
self.learn_rate = 0.001;
self.bais_learn_rate = 0.7;
self.bais_reg = 0.33;
def experiment_coldstart_map(exp_name, daily_data_file,\
min_occ_user, min_occ_prog, num_user, num_prog,\
method_list, blind_k_out, total_iteration, max_rank, binary = False):
'''
Parameters
----------
@param exp_name: the experiment name (prefix)
@param daily_datafile: a list of files.
@param min_occ_user: cold start user criteria
@param min_occ_prog: cold start user criteria
@param num_user: the number of users selected in the experiment.
@param num_prog: the number of programs selected in the experiment.
@param method_list:
@param blind_k_out: leave k out for each user. The k must be strict less than
min_occ_user
@param binary: if this is set to true then the binary data is used (non-zero set to 1).
Returns
----------
@return out
'''
print 'Blind k out: k = ', str(blind_k_out);
print 'Min_occ_user: '******'Min_occ_prog: ', str(min_occ_prog);
if blind_k_out >= min_occ_user:
raise ValueError('The k in the leave k out [' + str(blind_k_out)
+'] should be strictly less than min_occ_user [' + str(min_occ_user) +'].');
# define lko_log style.
lko_log = lambda msg: Logger.Log(msg, Logger.MSG_CATEGORY_EXP);
if isinstance(daily_data_file, list):
hash_file_str = str(hash(tuple(daily_data_file)));
else:
hash_file_str = str(hash(daily_data_file));
# construct exp_id
if binary:
exp_id = 'cst_bi_' + exp_name + '_data' + hash_file_str\
+ '_mu' + str(min_occ_user) + '_mp' + str(min_occ_prog) \
+ '_nu' + str(num_user) + '_np' + str(num_prog) \
+ '_k' + str(blind_k_out) + '_toiter' + str(total_iteration);
else:
exp_id = 'cst_' + exp_name + '_data' + hash_file_str\
+ '_mu' + str(min_occ_user) + '_mp' + str(min_occ_prog) \
+ '_nu' + str(num_user) + '_np' + str(num_prog) \
+ '_k' + str(blind_k_out) + '_toiter' + str(total_iteration);
lko_log('Experiment ID: ' + exp_id);
# load data.
lko_log('Read data...');
reader = DailyWatchTimeReader();
data = reader.read_file_with_minval(daily_data_file, min_occ_user, min_occ_prog, num_user, num_prog);
lko_log('Data loaded: ' + str(data));
if binary:
lko_log('Binarizing data...');
data.binarize();
else:
# normalize
lko_log('Normalizing data...');
data.normalize_row();
result = {};
for method in method_list:
# do for each method
perf_vect = [];
for iteration in range(total_iteration):
# do for each iteration for each method.
lko_log('Method: '+ method.unique_str() + ' Iteration: '+ str(iteration));
# data split of the current iteration.
split_resource_str = 'exp' + exp_id + '_blind_idx_iter' + str(iteration);
split_dir = exp_id + '/blind_idx';
blind_out_idx = URM.LoadResource(URM.RTYPE_RESULT, split_resource_str, split_dir);
if not blind_out_idx:
# randomly generate k items to blind out.
blind_out_idx = ds.sample_num(data.num_col, blind_k_out);
URM.SaveResource(URM.RTYPE_RESULT, split_resource_str, blind_out_idx, split_dir);
lko_log('Blind index done.');
# split the k items as a separate.
[data_tr, data_left] = data.blind_k_out(blind_out_idx);
lko_log('Start index');
iter_result = experiment_unit_leave_k_out_map(exp_id, method, \
data_tr, data_left, iteration, max_rank);
perf_vect.append(iter_result);
result[method.unique_str()] = perf_vect;
return result;
def experiment_leave_k_out(exp_name, daily_data_file, min_occ_user, min_occ_prog, \
method_list, leave_k_out, total_iteration, top_n, binary = False):
'''
Parameters
----------
@param exp_name: the experiment name (prefix)
@param daily_datafile:
@param min_occ_user:
@param method_list:
@param leave_k_out: leave k out for each user. The k must be strict less than
min_occ_user
@param binary: if this is set to true then the binary data is used (non-zero set to 1).
Returns
----------
@return out
'''
if leave_k_out >= min_occ_user:
raise ValueError(
'The k in the leave k out should be strictly less than min_occ_user.'
)
# define lko_log style.
lko_log = lambda msg: Logger.Log(msg, Logger.MSG_CATEGORY_EXP)
# construct exp_id
if binary:
exp_id = 'lko_bi_' + exp_name + '_data' +str(hash(daily_data_file)) + '_mu' + str(min_occ_user) + '_mp' + str(min_occ_prog) \
+ '_k' + str(leave_k_out) + '_toiter' + str(total_iteration)
else:
exp_id = 'lko_' + exp_name + '_data' +str(hash(daily_data_file)) + '_mu' + str(min_occ_user) + '_mp' + str(min_occ_prog) \
+ '_k' + str(leave_k_out) + '_toiter' + str(total_iteration)
lko_log('Experiment ID: ' + exp_id)
# load data.
lko_log('Read data...')
reader = DailyWatchTimeReader()
data = reader.read_file_with_minval(daily_data_file, min_occ_user,
min_occ_prog)
lko_log('Data loaded: ' + str(data))
if binary:
lko_log('Binarizing data...')
data.binarize()
else:
# normalize
lko_log('Normalizing data...')
data.normalize_row()
result = {}
for method in method_list:
# do for each method
perf_vect = []
for iteration in range(total_iteration):
# do for each iteration for each method.
lko_log('Method: ' + method.unique_str() + ' Iteration: ' +
str(iteration))
# data split of the current iteration.
split_resource_str = 'exp' + exp_id + '_lvidx_iter' + str(
iteration)
split_dir = exp_id + '/lv_idx'
leave_k_out_idx = URM.LoadResource(URM.RTYPE_RESULT,
split_resource_str, split_dir)
if not leave_k_out_idx:
# randomly generate k items from each row/user.
leave_k_out_idx = ds.leave_k_out(data, leave_k_out)
URM.SaveResource(URM.RTYPE_RESULT, split_resource_str,
leave_k_out_idx, split_dir)
# split the k items as a separate.
[data_left, data_tr] = data.leave_k_out(leave_k_out_idx)
iter_result = experiment_unit_leave_k_out(exp_id, method, \
data_tr, data_left, iteration, top_n)
perf_vect.append(iter_result)
result[method.unique_str()] = perf_vect
return result
def experiment_tr_te_map(exp_name, train_data_file, test_data_file, \
train_item_feature_file, test_item_feature_file, \
max_rank, binary = False):
'''
Parameters
----------
@param exp_name:
@param train_data_file:
@param test_data_file:
@param train_content_file:
@param test_content_file:
@param max_rank: the maximal N in the computation.
Returns
----------
@return out
'''
# initialize utilities
trte_log = lambda msg: Logger.Log(msg, Logger.MSG_CATEGORY_EXP)
# processing file name hashing (used for cache string).
# create hash for single file or a list of files.
if isinstance(train_data_file, list):
hash_file_tr_data_str = str(hash(tuple(train_data_file)))
else:
hash_file_tr_data_str = str(hash(train_data_file))
if isinstance(test_data_file, list):
hash_file_te_data_str = str(hash(tuple(test_data_file)))
else:
hash_file_te_data_str = str(hash(test_data_file))
if train_item_feature_file:
if isinstance(train_item_feature_file, list):
hash_file_tr_item_feature_str = str(
hash(tuple(train_item_feature_file)))
else:
hash_file_tr_item_feature_str = str(hash(train_item_feature_file))
else:
hash_file_tr_item_feature_str = ''
if test_item_feature_file:
if isinstance(test_item_feature_file, list):
hash_file_te_item_feature_str = str(
hash(tuple(test_item_feature_file)))
else:
hash_file_te_item_feature_str = str(hash(test_item_feature_file))
else:
hash_file_te_item_feature_str = ''
# display information
print 'Training data file', train_data_file, ' [hash:', hash_file_tr_data_str, ']'
if train_item_feature_file:
print 'Training content feature provided: ', train_item_feature_file, \
' [hash:', hash_file_tr_item_feature_str, ']'
else:
print 'Training content feature not provided.'
print 'Testing data file ', test_data_file, ' [hash:', hash_file_te_data_str, ']'
if test_item_feature_file:
print 'Testing content feature provided: ', test_item_feature_file, \
' [hash:', hash_file_te_item_feature_str, ']'
else:
print 'Testing content feature not provided.'
if binary:
exp_id_prefix = 'trte_bi_'
else:
exp_id_prefix = 'trte_'
exp_id = exp_id_prefix + exp_name + '_trdata_' + hash_file_tr_data_str \
+ '_tedata_' + hash_file_te_data_str \
+ '_tritemf_' + hash_file_tr_item_feature_str \
+ '_tritemf_' + hash_file_te_item_feature_str
trte_log('Experiment ID: ' + exp_id)
# load utility data and feature data.
trte_log('Read training data...')
reader = UtilityDataReader(fieldDelimiter='\t')
tr_data = reader.read_file_with_minval(train_data_file, 0, 0)
trte_log('Training data loaded: ' + str(tr_data))
te_data = reader.read_file_with_minval(test_data_file, 0, 0)
trte_log('Testing data loaded: ' + str(te_data))
# load item feature data
if binary:
trte_log('Binarizing data...')
tr_data.binarize()
te_data.binarize()
result = {}
'''
Created on Jan 29, 2014
@author: jiayu.zhou
'''
import numpy as np
from rs.algorithms.recommendation.generic_recalg import CFAlg
from rs.utils.log import Logger
# an encapsulated logger.
log = lambda message: Logger.Log(RandUV.ALG_NAME + ':' + message, Logger.
MSG_CATEGORY_ALGO)
class RandUV(CFAlg):
'''
A random guess recommender (demo).
'''
ALG_NAME = 'RANDOM ALGO'
def __init__(self, latent_factor=5, verbose=False):
'''
Constructor
'''
# initialize parameters.
self.latent_factor = latent_factor
log('dummy algorithm instance created: latent factor ' +
str(self.latent_factor))
self.verbose = verbose
'''
import numpy as np
import csv
import cPickle as pickle
import os
#@UnusedImport
import sys
from rs.utils.log import Logger
from scipy.sparse import coo_matrix
from rs.data.daily_watchtime import DailyWatchTimeReader
from rs.utils.sparse_matrix import normalize_row
from scipy.spatial.distance import cosine
mcpl_log = lambda message: Logger.Log('PROG SIMILARITY: ' + message, Logger.
MSG_CATEGORY_EXP)
if __name__ == '__main__':
if len(sys.argv) >= 3:
filename = sys.argv[1]
rovi_daily_file = sys.argv[2]
else:
# INPUT: the ROVI daily mapping.
# Hadoop location: /apps/vddil/rovi_daily
rovi_daily_file = "/Users/jiayu.zhou/Data/rovi_daily/20131209.tsv"
# INPUT: the aggregated data file.
# Hadoop location: /apps/vddil/duid-program-watchTime-genre
#filename = "/Users/jiayu.zhou/Data/duid-program-watchTime-genre/20131209/part-r-00000";
filename = "../../datasample/agg_duid_pid_watchtime_genre/20131209_100000"