def collaborative(self,ratings,user_id):
reader = Reader()
#ratings.head()
temp_ratings = ratings
data = Dataset.load_from_df(temp_ratings[['user_id', 'book_id', 'rating']], reader)
data.split(n_folds=2)
## Training the data ##
svd = SVD()
evaluate(svd, data, measures=['RMSE', 'MAE'])
trainset = data.build_full_trainset()
algo = SVD()
algo.fit(trainset)
#svd.train(trainset)
## Testing the data ##
from collections import defaultdict
testset = trainset.build_anti_testset()
predictions = algo.test(testset)
count = 0
for uid, iid, true_r, est, _ in predictions:
if uid == user_id:
count = count+1
temp_ratings.loc[len(temp_ratings)+1]= [uid,iid,est]
#print("count\n")
#print(count)
#print("\n--------here-------\n")
#print(temp_ratings)
cb = temp_ratings[(temp_ratings['user_id'] == user_id)][['book_id', 'rating']]
#print("\n--------here-------\n")
#print(cb)
cb = temp_ratings[(temp_ratings['user_id'] == user_id)][['book_id', 'rating']]
return(cb)
def test_performances():
"""Test the returned dict. Also do dumping."""
current_dir = os.path.dirname(os.path.realpath(__file__))
folds_files = [(current_dir + '/custom_train',
current_dir + '/custom_test')]
reader = Reader(line_format='user item rating', sep=' ', skip_lines=3)
data = Dataset.load_from_folds(folds_files=folds_files, reader=reader,
rating_scale=(1, 5))
algo = NormalPredictor()
tmp_dir = tempfile.mkdtemp() # create tmp dir
with pytest.warns(UserWarning):
performances = evaluate(algo, data, measures=['RmSe', 'Mae'],
with_dump=True, dump_dir=tmp_dir, verbose=2)
shutil.rmtree(tmp_dir) # remove tmp dir
assert performances['RMSE'] is performances['rmse']
assert performances['MaE'] is performances['mae']
data = Dataset.load_builtin('ml-100k')
u_cols = ['user_id', 'age', 'sex', 'occupation', 'zip_code']
users = pd.read_csv('ml-100k/u.user',
sep='|',
names=u_cols,
encoding='latin-1')
#print users.head()
#data.split(n_folds=2)
algo1 = SVD()
algo2 = KNNBasic()
algo3 = KNNBaseline()
algo4 = KNNWithMeans()
algo5 = NormalPredictor()
#start_time1=time.time()
start = timeit.default_timer()
perf1 = evaluate(algo1, data, measures=['RMSE', 'MAE'])
stop = timeit.default_timer()
print("--- %s seconds ---" % (stop - start))
#start_time2=time.time()
start1 = timeit.default_timer()
perf2 = evaluate(algo2, data, measures=['RMSE', 'MAE'])
stop1 = timeit.default_timer()
print("...%s seconds..." % (stop1 - start1))
#start_time3=time.time()
perf3 = evaluate(algo3, data, measures=['RMSE', 'MAE'])
#print ("...%s seconds..."%(time.time()-start_time3))
#start_time4=time.time()
perf4 = evaluate(algo4, data, measures=['RMSE', 'MAE'])
#print ("...%s seconds..."%(time.time()-start_time4))
#start_time5=time.time()
perf5 = evaluate(algo5, data, measures=['RMSE', 'MAE'])
def hybrid(userId,train_rd):
#get_ipython().magic('matplotlib inline')
import pandas as pd
import numpy as np
import matplotlib.pyplot as plt
import seaborn as sns
from scipy import stats
from ast import literal_eval
from sklearn.feature_extraction.text import TfidfVectorizer, CountVectorizer
from sklearn.metrics.pairwise import linear_kernel, cosine_similarity
from nltk.stem.snowball import SnowballStemmer
from nltk.stem.wordnet import WordNetLemmatizer
from nltk.corpus import wordnet
from surprise import Reader, Dataset, SVD, evaluate
import warnings; warnings.simplefilter('ignore')
# In[2]:
#Popularity#
md = pd.read_csv('CustomData/FinalData.csv')
fd = pd.read_csv('avg_ratings1.csv')
fd[fd['rating'].notnull()]['rating'] = fd[fd['rating'].notnull()]['rating'].astype('float')
vote_averages= fd[fd['rating'].notnull()]['rating']
C = vote_averages.mean()
fd1 = pd.read_csv('ratings_count.csv')
fd1[fd1['rating'].notnull()]['rating'] = fd1[fd1['rating'].notnull()]['rating'].astype('float')
vote_counts = fd1[fd1['rating'].notnull()]['rating']
# In[3]:
m = vote_counts.quantile(0.75)
# In[4]:
md['ratings_count'] = fd1['rating']
md['average_rating'] = fd['rating']
# In[28]:
#print(md.shape)
qualified = md[(md['ratings_count'].notnull())][['book_id','title', 'authors', 'ratings_count', 'average_rating']]
qualified['ratings_count'] = qualified['ratings_count'].astype('float')
qualified['average_rating'] = qualified['average_rating'].astype('float')
#qualified.shape
# In[29]:
def weighted_rating(x):
v = x['ratings_count']
R = x['average_rating']
return (v/(v+m) * R) + (m/(m+v) * C)
# In[30]:
qualified['popularity_rating'] = qualified.apply(weighted_rating, axis=1)
#qualified['wr']
#qualified = qualified.sort_values('popularity_rating', ascending=False).head(250)
pop = qualified[['book_id','popularity_rating']]
#print(qualified.shape)
#print(pop.shape)
# In[11]:
### Collaborative ##
reader = Reader()
ratings=train_rd
#ratings = pd.read_csv('ratings.csv')
#ratings.head()
temp_ratings = ratings[0:1000]
#print(temp_ratings)
data = Dataset.load_from_df(temp_ratings[['user_id', 'book_id', 'rating']], reader)
data.split(n_folds=2)
# In[12]:
svd = SVD()
evaluate(svd, data, measures=['RMSE', 'MAE'])
# In[13]:
trainset = data.build_full_trainset()
#svd.train(trainset)
algo = SVD()
algo.fit(trainset)
## usefule = temp_rating[rating]
# In[14]:
#print(len(temp_ratings[temp_ratings['user_id']==userId]))
# In[ ]:
def get_top_n(predictions, n=10):
'''Return the top-N recommendation for each user from a set of predictions.
Args:
predictions(list of Prediction objects): The list of predictions, as
returned by the test method of an algorithm.
n(int): The number of recommendation to output for each user. Default
is 10.
Returns:
A dict where keys are user (raw) ids and values are lists of tuples:
[(raw item id, rating estimation), ...] of size n.
'''
# First map the predictions to each user.
top_n = defaultdict(list)
for uid, iid, true_r, est, _ in predictions:
top_n[uid].append((iid, est))
# Then sort the predictions for each user and retrieve the k highest ones.
for uid, user_ratings in top_n.items():
#user_ratings.sort(key=lambda x: x[1], reverse=True)
top_n[uid] = user_ratings[:n]
return top_n
# In[15]:
from collections import defaultdict
testset = trainset.build_anti_testset()
predictions = algo.test(testset)
'''
top_n = get_top_n(predictions, n=10000)
#print(top_n)
#result = pd.DataFrame(top_n)
#print(result)
for uid, user_ratings in top_n.items():
#print(uid, [iid for (iid , _) in user_ratings])
for uid, iid, true_r, est, _ in predictions:
temp_ratings.loc[uid]= [uid,iid,est]
#temp_ratings[i]['cf'] = temp_ratings[(temp_ratings['user_id'] == uid)][['book_id']]
'''
count = 0
for uid, iid, true_r, est, _ in predictions:
if uid == userId:
count = count+1
temp_ratings.loc[len(temp_ratings)+1]= [uid,iid,est]
#print('here')
#print(uid)
#temp_ratings.append([uid,iid,est],ignore_index=True)
#print(count)
#print(temp_ratings)
# In[16]:
#print(len(temp_ratings[temp_ratings['user_id']==2]))
# In[ ]:
# In[46]:
##### CONTENT ######
import pandas as pd
import numpy as np
import matplotlib.pyplot as plt
import seaborn as sns
from scipy import stats
from ast import literal_eval
from sklearn.feature_extraction.text import TfidfVectorizer, CountVectorizer
from sklearn.metrics.pairwise import linear_kernel, cosine_similarity
from nltk.stem.snowball import SnowballStemmer
from nltk.stem.wordnet import WordNetLemmatizer
from nltk.corpus import wordnet
from surprise import Reader, Dataset, SVD, evaluate
import csv
import warnings; warnings.simplefilter('ignore')
# In[48]:
md=pd.read_csv('CustomData/FinalData.csv')
rd=train_rd
#rd=pd.read_csv('ratings.csv')
md['book_id'] = md['book_id'].astype('int')
rd['book_id'] = rd['book_id'].astype('int')
rd['user_id'] = rd['user_id'].astype('int')
rd['rating'] = rd['rating'].astype('int')
#print(md.head())
md['authors'] = md['authors'].str.replace(' ','')
md['authors'] = md['authors'].str.lower()
md['authors'] = md['authors'].str.replace(',',' ')
#print(md.head())
md['authors'] = md['authors'].apply(lambda x: [x,x])
#print(md['authors'])
md['Genres']=md['Genres'].str.split(';')
#print(md['Genres'])
md['soup'] = md['authors'] + md['Genres']
#print(md['soup'])
md['soup'] = md['soup'].str.join(' ')
#md['soup'].fillna({})
#print(md['soup'])
count = CountVectorizer(analyzer='word',ngram_range=(1,1),min_df=0, stop_words='english')
count_matrix = count.fit_transform(md['soup'])
#print (count_matrix.shape)
#print np.array(count.get_feature_names())
#print(count_matrix.shape)
cosine_sim = cosine_similarity(count_matrix, count_matrix)
# In[91]:
def build_user_profiles():
user_profiles=np.zeros((53421,999))
#print(rd.iloc[0]['user_id'])
#len(rd['book_id'])
for i in range(0,1000):
u=rd.iloc[i]['user_id']
b=rd.iloc[i]['book_id']
#print(u,b)
#print(i)
#if b<999:
#print("match at "+str(b))
user_profiles[u][b-1]=rd.iloc[i]['rating']
#print(user_profiles)
return user_profiles
user_profiles=build_user_profiles()
def _get_similar_items_to_user_profile(person_id):
#Computes the cosine similarity between the user profile and all item profiles
#print(user_profiles[person_id])
#print("\n---------\n")
#print(cosine_sim[0])
user_ratings = np.empty((999,1))
cnt=0
for i in range(0,998):
book_sim=cosine_sim[i]
user_sim=user_profiles[person_id]
user_ratings[i]=(book_sim.dot(user_sim))/sum(cosine_sim[i])
maxval = max(user_ratings)
#print(maxval)
for i in range(0,998):
user_ratings[i]=((user_ratings[i]*5.0)/(maxval))
#print(user_ratings[i])
if(user_ratings[i]>3):
#print("MILA KUCCHHH")
cnt+=1
#print(max(user_ratings))
#print (cnt)
#print(cosine_similarities)
#return similar_items
return user_ratings
content_ratings = _get_similar_items_to_user_profile(userId)
# In[100]:
num = md[['book_id']]
#print(num)
num1 = pd.DataFrame(data=content_ratings[0:,0:])
frames = [num, num1]
#result = pd.concat([df1, df4], axis=1, join_axes=[df1.index])
mer = pd.concat(frames, axis =1,join_axes=[num.index])
mer.columns=['book_id', 'content_rating']
#print(mer.shape)
#print('here')
#print(mer)
# In[102]:
## for user 2 #
#print(temp_ratings.shape)
cb = temp_ratings[(temp_ratings['user_id'] == userId)][['book_id', 'rating']]
# print(cb.shape)
# print(pop.shape)
hyb = md[['book_id']]
hyb = hyb.merge(cb,on = 'book_id')
hyb = hyb.merge(pop, on='book_id')
hyb = hyb.merge(mer, on='book_id')
#hyb.shape
# In[106]:
def weighted_rating(x):
v = x['rating']
R = x['popularity_rating']
c = x['content_rating']
return 0.4*v + 0.2*R + 0.4 * c
# In[107]:
print(hyb)
hyb['final'] = hyb.apply(weighted_rating, axis=1)
hyb = hyb.sort_values('final', ascending=False).head(999)
#print(hyb['final'])
print(hyb)
return hyb
n_users = ratings.userId.unique().shape[0]
n_movies = ratings.movieId.unique().shape[0]
print 'Number of users = ' + str(n_users) + ' | Number of movies = ' + str(
n_movies)
# In[69]:
data = Dataset.load_from_df(ratings[['userId', 'movieId', 'rating']],
reader=reader)
data.split(n_folds=5)
# In[70]:
svd = SVD()
perf1 = evaluate(svd, data, measures=['RMSE', 'MAE'])
# In[71]:
slp = SlopeOne()
perf2 = evaluate(slp, data, measures=['RMSE', 'MAE'])
# In[72]:
knn = KNNBaseline()
perf3 = evaluate(knn, data, measures=['RMSE', 'MAE'])
# In[73]:
trainset = data.build_full_trainset()
svd.train(trainset)
file_path = os.path.expanduser('~/PycharmProjects/aashay/shuffled_ratings.csv')
reader = Reader(line_format='user item rating', sep=',')
data = surprise.Dataset.load_from_file(file_path, reader=reader)
# data.split(5) # split data for 2-folds cross validation
# dataset = 'ml-1m'
# data = Dataset.load_builtin(dataset)
data.split(2)
kf = KFold(n_splits=2,random_state=0,shuffle=False) # folds will be the same for all algorithms.
table = []
for klass in classes:
start = time.time()
#out = cross_validate(klass(), data, ['rmse', 'mae'], kf)
out = surprise.evaluate(klass(), data, measures=['RMSE'], with_dump=False
)
cv_time = str(datetime.timedelta(seconds=int(time.time() - start)))
link = LINK[klass.__name__]
mean_rmse = '{:.3f}'.format(np.mean(out['test_rmse']))
mean_mae = '{:.3f}'.format(np.mean(out['test_mae']))
new_line = [link, mean_rmse, mean_mae, cv_time]
print(tabulate([new_line], tablefmt="pipe")) # print current algo perf
table.append(new_line)
header = [LINK[data],
'RMSE',
'MAE',
'Time'
]
print(tabulate(table, header, tablefmt="pipe"))
# =============================== load data ===================================
# ml-latest-small
# file_path = 'input/ml-latest-small/ratings.csv'
# reader = env.Reader(line_format='user item rating timestamp', sep=',', skip_lines=1)
# ------------------------------------------------------------------------------
# ml-100k
file_path = 'input/ml-100k/u.data'
reader = env.Reader(line_format='user item rating timestamp', sep='\t', skip_lines=1)
# ------------------------------------------------------------------------------
# ml-20m
# file_path = 'input/ml-20m/ratings.csv'
# reader = env.Reader(line_format='user item rating timestamp', sep=',', skip_lines=1)
# ==============================================================================
# data = env.Dataset.load_from_file(file_path, reader=reader)
# data.split(n_folds=5)
# file_path = 'input/ml-100k/u.data'
# reader = myDataset.Reader(line_format='user item rating timestamp', sep='\t', skip_lines=1, implicit=True,
# threshold=4.5)
data = myDataset.Dataset.load_from_file(file_path, reader=reader)
data.split(n_folds=5)
# define algorithm
algo = SLIM3(l1_reg=0.001, l2_reg=0.01, max_iter=200, tol=1e-3)
# evaluate
env.evaluate(algo, data, measures=['rmse', 'mae', 'fcp'])
# myEvaluate.evaluate(algo, data, measures=['fcp', 'hr', 'arhr'], topN=10, leave_out_num=1, verbose=2)
self.trainset = trainset
def estimate(self, u, i):
'''Rende la valutazione/rating stimato dell'utente u per l'item i.'''
# Rende un prodotto scalare tra p_u e q_i se l'utente e l'item sono conosciuti, altrimenti rende una media di tutti i ratings
if self.trainset.knows_user(u) and self.trainset.knows_item(i):
return numpi.dot(self.p[u], self.q[i])
else:
return self.trainset.global_mean
# Caricamento del db, utilizziamo il Movielens DataSet (https://grouplens.org/datasets/movielens/100k/)
# Grazie alla libreria Surprise possiamo scaricarlo automaticamente.
data = surprise.Dataset.load_builtin('ml-100k')
data.split(2) # Divide i dati per 2-folds cross validation
algo = RecAlgo(learning_rate=.01, n_epochs=10, n_factors=10)
surprise.evaluate(algo, data, measures=['RMSE'])
surprise.evaluate(algo, data, measures=['mae'])
# Utilizziamo un algoritmo di neighborhood sugli stessi dati come confronto
algo = surprise.KNNBasic()
surprise.evaluate(algo, data, measures=['RMSE'])
surprise.evaluate(algo, data, measures=['mae'])
# Utilizziamo un metodo di fattorizzazione piu sofisticato sugli stessi dati
algo = surprise.SVD()
surprise.evaluate(algo, data, measures=['RMSE'])
surprise.evaluate(algo, data, measures=['mae'])
import time
import matplotlib.pyplot as plt
import psutil
timex=[]
mem=[]
m1=psutil.virtual_memory().percent
start = time.time()
df1 = pd.read_csv('C:/Users/Mausamee Patel/Desktop/Project/A5/Ratings_1Million1.csv', dtype={'rating': float})
reader = Reader(rating_scale=(1, 5))
data = Dataset.load_from_df(df1[['user_id','book_id','rating']], reader)
data.split(2)
algo = surprise.KNNBasic()
result1 = surprise.evaluate(algo, data, measures=['RMSE'])
end = time.time()
print("Time1",end - start)
timex.append(end-start)
m2=psutil.virtual_memory().percent
#print(m2)
mem.append(m2)
start = time.time()
df2 = pd.read_csv('C:/Users/Mausamee Patel/Desktop/Project/A5/Ratings_1Million2.csv', dtype={'rating': float})
reader = Reader(rating_scale=(1, 5))
data = Dataset.load_from_df(df2[['user_id','book_id','rating']], reader)
data.split(2)
algo = surprise.KNNBasic()
result2 = surprise.evaluate(algo, data, measures=['RMSE'])
end = time.time()
gen_occ_mean = merged_df[['sex', 'rating', 'movie_id', 'occupation'
]].pivot_table(values='rating',
index='movie_id',
columns=['occupation', 'sex'],
aggfunc='mean')
print(gen_occ_mean.head())
print(score(cf_gen_occ))
# Define a Reader object
# The Reader object helps in parsing the file or dataframe containing ratings
reader = Reader()
# Create the dataset to be used for building the filter
data = Dataset.load_from_df(ratings, reader)
# Define the algorithm object; in this case kNN
knn = KNNBasic()
# Evaluate the performance in terms of RMSE
evaluate(knn, data, measures=['RMSE'])
# Import SVD
from surprise import SVD
# Define the SVD algorithm object
svd = SVD()
# Evaluate the performance in terms of RMSE
evaluate(svd, data, measures=['RMSE'])
def test_SVD_parameters():
"""Ensure that all parameters are taken into account."""
# The baseline against which to compare.
algo = SVD(n_factors=1, n_epochs=1)
rmse_default = evaluate(algo, data, measures=['rmse'])['rmse']
# n_factors
algo = SVD(n_factors=2, n_epochs=1)
rmse_factors = evaluate(algo, data, measures=['rmse'])['rmse']
assert rmse_default != rmse_factors
# n_epochs
algo = SVD(n_factors=1, n_epochs=2)
rmse_n_epochs = evaluate(algo, data, measures=['rmse'])['rmse']
assert rmse_default != rmse_n_epochs
# biased
algo = SVD(n_factors=1, n_epochs=1, biased=False)
rmse_biased = evaluate(algo, data, measures=['rmse'])['rmse']
assert rmse_default != rmse_biased
# lr_all
algo = SVD(n_factors=1, n_epochs=1, lr_all=5)
rmse_lr_all = evaluate(algo, data, measures=['rmse'])['rmse']
assert rmse_default != rmse_lr_all
# reg_all
algo = SVD(n_factors=1, n_epochs=1, reg_all=5)
rmse_reg_all = evaluate(algo, data, measures=['rmse'])['rmse']
assert rmse_default != rmse_reg_all
# lr_bu
algo = SVD(n_factors=1, n_epochs=1, lr_bu=5)
rmse_lr_bu = evaluate(algo, data, measures=['rmse'])['rmse']
assert rmse_default != rmse_lr_bu
# lr_bi
algo = SVD(n_factors=1, n_epochs=1, lr_bi=5)
rmse_lr_bi = evaluate(algo, data, measures=['rmse'])['rmse']
assert rmse_default != rmse_lr_bi
# lr_pu
algo = SVD(n_factors=1, n_epochs=1, lr_pu=5)
rmse_lr_pu = evaluate(algo, data, measures=['rmse'])['rmse']
assert rmse_default != rmse_lr_pu
# lr_qi
algo = SVD(n_factors=1, n_epochs=1, lr_qi=5)
rmse_lr_qi = evaluate(algo, data, measures=['rmse'])['rmse']
assert rmse_default != rmse_lr_qi
# reg_bu
algo = SVD(n_factors=1, n_epochs=1, reg_bu=5)
rmse_reg_bu = evaluate(algo, data, measures=['rmse'])['rmse']
assert rmse_default != rmse_reg_bu
# reg_bi
algo = SVD(n_factors=1, n_epochs=1, reg_bi=5)
rmse_reg_bi = evaluate(algo, data, measures=['rmse'])['rmse']
assert rmse_default != rmse_reg_bi
# reg_pu
algo = SVD(n_factors=1, n_epochs=1, reg_pu=5)
rmse_reg_pu = evaluate(algo, data, measures=['rmse'])['rmse']
assert rmse_default != rmse_reg_pu
# reg_qi
algo = SVD(n_factors=1, n_epochs=1, reg_qi=5)
rmse_reg_qi = evaluate(algo, data, measures=['rmse'])['rmse']
assert rmse_default != rmse_reg_qi
cust_benchmark = round(df_cust_summary['count'].quantile(0.7),0)
drop_cust_list = df_cust_summary[df_cust_summary['count'] < cust_benchmark].index
df = df[~df['Movie_id'].isin(drop_movie_list)]
df = df[~df['Cust_id'].isin(drop_cust_list)]
#Pivot data
df_p = pd.pivot_table(df, index="Cust_id", columns="Movie_id", values="Rating")
#See which algorithm gives the lowest RMSE value
reader = Reader()
data = Dataset.load_from_df(df[['Cust_id', 'Movie_id', 'Rating']][:100000], reader)
benchmark = []
for algo in [SVD(), SVDpp(), SlopeOne(), NMF(), NormalPredictor(), BaselineOnly(), CoClustering()]:
data.split(n_folds=3)
results = evaluate(algo, data, measures = ["RMSE"])
tmp = pd.DataFrame.from_dict(results).mean(axis=0)
tmp = tmp.append(pd.Series([str(algo).split(' ')[0].split('.')[-1]], index=['Algorithm']))
benchmark.append(tmp)
print(pd.DataFrame(benchmark).set_index('Algorithm').sort_values('rmse'))
##Train and Test split
#reader = Reader()
#data = Dataset.load_from_df(df[['Cust_id', 'Movie_id', 'Rating']], reader)
#trainset, testset = train_test_split(data, test_size = 0.25)
#blo = BaselineOnly()
#blo.fit(trainset)
#predictions = blo.test(testset[:10000])
#accuracy.rmse(predictions)
from surprise import Reader, Dataset
from surprise import NMF, evaluate
# creating the format for the dataset when given the user, item, rating and timestamp
data_reader = Reader(line_format="user item rating timestamp", sep="\t")
# store the data in the specific format created above
# u. data is the data we want
data = Dataset.load_from_file("./ml-100k/u.data", reader=data_reader)
# will be splitting the data into 5 folds for cross validation
data.split(n_folds=5)
# for this project I will be using the NMF algorithm
algorithm = NMF()
evaluate(algorithm, data, measures=["RMSE", "MAE"])
# train the whole data set now
training_set = data.build_full_trainset()
algorithm.train(training_set)
# set the specific user and movie I want to predict
user_id = str(200)
item_id = str(222)
actual_rating = 5
# see how it works!
print(algorithm.predict(user_id, item_id, actual_rating))
top_n[uid].append((iid, est))
# Then sort the predictions for each user and retrieve the k highest ones.
for uid, user_ratings in top_n.items():
user_ratings.sort(key=lambda x: x[1], reverse=True)
top_n[uid] = user_ratings[:n]
return top_n
reader = Reader(rating_scale=(0, 5))
dataset = Dataset.load_from_df(actions[["user_id", "context_product"]], reader)
algo = SVD()
evaluate(algo, dataset, measures=["RMSE", "MAE"])
trainset = dataset.build_full_trainset()
algo.fit(trainset)
algo.predict("53ff5739aebb450829000074", "affect-health-drinking-chocolate",
15)
algo.predict("53ff5739aebb450829000074", "affect-health-drinking-chocolate", 0)
testset = trainset.build_anti_testset()
predictions = algo.test(testset)
top_n = get_top_n(predictions, n=10)
recommendations = {}
# Print the recommended items for each user
for uid, user_ratings in top_n.items():
data=users.assign(key=1).merge(hotels.assign(key=1), on='key', how='inner').drop('key', axis=1)
data=data.merge(activity_count, on=['user', 'hotel'], how='left')
data['browse']=data.browse.fillna(0)
data=data[['user', 'hotel', 'browse']]
# tentatively CV test for some algorithms
reader = Reader(rating_scale=(0, 1))
data = Dataset.load_from_df(data, reader)
data_cv=data
data_cv.split(n_folds=5)
# SVD test
svd = SVD()
perf = evaluate(svd, data, measures=['RMSE'])
print_perf(perf) # MSE 0.052
param_svd = {'n_factors': [50, 100], 'lr_all': [0.003, 0.005],
'reg_all': [0.05, 0.1, 0.5]}
gs = GridSearch(SVD, param_svd, measures=['RMSE'])
gs.evaluate(data_cv) # RMSE 0.2272 ~ 0.2284, after many tests notice 0.2272 is a benchmark, 100, 0.003, 0.1
# Co-clustering test
coc=CoClustering()
perf = evaluate(coc, data, measures=['RMSE'])
print_perf(perf) # MSE 0.053
param_svd = {'n_cltr_u': [3, 5, 7], 'n_cltr_i': [3, 5, 7],
'n_epochs': [10, 20]}
gs = GridSearch(CoClustering, param_svd, measures=['RMSE'])
from surprise import Dataset
from surprise import SVD
from surprise import evaluate, print_perf
# Load the movielens-100k dataset (download it if needed),
# and split it into 3 folds for cross-validation.
data = Dataset.load_builtin('ml-100k')
data.split(n_folds=3)
# We'll use the famous SVD algorithm.
algo = SVD()
# Evaluate performances of our algorithm on the dataset.
perf = evaluate(algo, data, measures=['RMSE', 'MAE'])
print_perf(perf)
train[['id_usuario', 'id_restaurante', 'rating_ambiente',
'fecha']].to_csv('surprise_format.csv', index=False)
file_path = 'surprise_format.csv'
reader = Reader(line_format='user item rating timestamp',
sep=',',
skip_lines=1)
data = Dataset.load_from_file(file_path, reader=reader)
data.split(n_folds=5)
# We'll use the famous SVD++ algorithm.
algo = SVDpp()
# Evaluate performances of our algorithm on the dataset.
perf = evaluate(algo, data, measures=['RMSE', 'MAE'])
print_perf(perf)
#grid search
SVDpp_ambiente = SVDpp()
param_grid = {
'n_epochs': [50, 100, 150],
'lr_all': [0.002, 0.003, 0.004],
'reg_all': [0.2, 0.3],
'n_factors': [10, 20, 30, 40]
}
grid_search = GridSearch(SVDpp_ambiente, param_grid, measures=['RMSE', 'FCP'])
def eval(self):
# Evaluate performances of our algorithm on the dataset.
perf = evaluate(self.svd, self.data, measures=['RMSE'])
print_perf(perf)
import os
from surprise import Reader, Dataset
# 指定文件路径
file_path = os.path.expanduser('./popular_music_suprise_format.txt')
# 指定文件格式
reader = Reader(line_format='user item rating timestamp', sep=',')
# 从文件读取数据
music_data = Dataset.load_from_file(file_path, reader=reader)
# 分成5折
music_data.split(n_folds=5)
# 使用NormalPredictor
from surprise import NormalPredictor, evaluate
algo1 = NormalPredictor()
perf1 = evaluate(algo1, music_data, measures=['RMSE', 'MAE'])
# 使用BaselineOnly
from surprise import BaselineOnly, evaluate
algo2 = BaselineOnly()
perf2 = evaluate(algo2, music_data, measures=['RMSE', 'MAE'])
# 使用基础版协同过滤
from surprise import KNNBasic, evaluate
algo3 = KNNBasic()
perf3 = evaluate(algo3, music_data, measures=['RMSE', 'MAE'])
# 使用均值协同过滤
from surprise import KNNWithMeans, evaluate
algo4 = KNNWithMeans()
perf4 = evaluate(algo4, music_data, measures=['RMSE', 'MAE'])
param_grid = { 'n_factors':range(10,30,2), 'n_epochs': [10,15,20], 'lr_all': [0.002, 0.005, 0.1],'reg_all': [0.4, 0.6, 0.8]}
param_grid = { 'n_factors':range(2,22,2), 'n_epochs': [10], 'lr_all': [0.1],'reg_all': [0.4]}
param_grid = { 'n_factors':[2], 'n_epochs':range(11), 'lr_all': [0.1],'reg_all': [0.4]}
grid_search = GridSearch(SVDpp, param_grid, measures=['RMSE', 'MAE'])
grid_search.evaluate(music_data)
print(grid_search.best_params['RMSE'])
print(grid_search.best_params['MAE'])
# 开始训练模型
print('开始训练模型...')
#algo = KNNBaseline()
algo = SVDpp(n_factors=grid_search.best_params['RMSE']['n_factors'],n_epochs=grid_search.best_params['RMSE']['n_epochs'],lr_all=grid_search.best_params['RMSE']['lr_all'],reg_all=grid_search.best_params['RMSE']['reg_all'],verbose=2)
algo=SVDpp()
#algo=SVD()
#algo=SVDpp()
perf = evaluate(algo, music_data, measures=['RMSE', 'MAE'],verbose=1)
print_perf(perf)
#print()
#print('针对歌单进行预测:')
#current_playlist_name =list(name_id_dict.keys())[3]
#print('歌单名称', current_playlist_name)
#playlist_rid = name_id_dict[current_playlist_name]
#print('歌单rid', playlist_rid)
#playlist_inner_id = algo.trainset.to_inner_uid(playlist_rid)
#print('歌曲inid', playlist_inner_id)
#algo.compute_similarities()
#Intialising the Reader which is used to parse the file containing the ratings reader=Reader() #Making the dataset containing the column as userid itemid ratings #the order is very specific and we have to follow the same order dataset=Dataset.load_from_df(ratings_dataset[['userId','movieId','rating']],reader) #Using the split function to perform cross validation dataset.split(n_folds=6) #Intialising the SVD model and specifying the number of latent features #we can tune this parameters according to our requirement svd=SVD(n_factors=25) #evaluting the model on the based on the root mean square error and Mean absolute error evaluate(svd,dataset,measures=['rmse','mae']) #making the dataset to train our model train=dataset.build_full_trainset() #training our model svd.train(train) #Making a new series which have two columns in it #Movie name and movie id movies_dataset = movies_dataset.reset_index() titles = movies_dataset['movie_name'] indices = pd.Series(movies_dataset.index, index=movies_dataset['movie_name']) #Function to make recommendation to the user def recommendataion(user_id,movie):
def metrics(self, measures): return evaluate(self.algo, self.data, measures=measures)
from surprise import Reader, Dataset, SVD, evaluate
sns.set_style("darkgrid")
df1 = pd.read_csv('../../Data/combined_data_1.txt',
header=None,
usecols=[0, 1],
names=['uid', 'rating'])
df1['rating'] = df1['rating'].astype(float).fillna(1.0)
df1['iid'] = pd.DataFrame(list(range(len(df1))))
df = df1.head(100000)
df = df[['uid', 'iid', 'rating']]
df_title = pd.read_csv('../../Data/movie_titles.csv',
encoding="ISO-8859-1",
header=None,
names=['Movie_Id', 'Year', 'Name'])
USERID = '822109'
reader = Reader()
data = Dataset.load_from_df(df, reader)
alg = SVD()
output = alg.fit(data.build_full_trainset())
evaluate(alg, data)
pickle.dump([alg, df, df_title], open('../../Evaluations/matrix-data.p', "wb"))
print(df[df['rating'] == 5]['uid'])
def surprise_algorithms_print_perf():
print('Surprise Algorithms (Tabla de resultados finales)...')
print('Que data desea utilizar?')
print('(1) Android')
print('(2) WordPress')
data_utilizar = input()
# Funcion de encoding para no tener error de lectura del archivo.
reload(sys)
sys.setdefaultencoding('utf8')
if data_utilizar == 1:
file_path = configuration.FILE_PATH_ANDROID
reader = Reader(line_format='user item rating', sep='\t')
else:
file_path = configuration.FILE_PATH_WORDPRESS
reader = Reader(line_format='user item rating', sep=',')
# Dataset
data = Dataset.load_from_file(file_path, reader=reader)
data.split(n_folds=5)
# BaselineOnly
algo_normal_predictor = NormalPredictor()
perf_normal_predictor = evaluate(algo_normal_predictor,
data,
measures=['RMSE', 'MAE'],
verbose=False)
# SVD
algo_svd = SVD()
perf_svd = evaluate(algo_svd,
data,
measures=['RMSE', 'MAE'],
verbose=False)
# BaselineOnly
algo_baseline_only = BaselineOnly()
perf_baseline_only = evaluate(algo_baseline_only,
data,
measures=['RMSE', 'MAE'],
verbose=False)
# SVDpp
algo_svdpp = SVDpp()
perf_svdpp = evaluate(algo_svdpp,
data,
measures=['RMSE', 'MAE'],
verbose=False)
# NMF
algo_nmf = NMF()
perf_nmf = evaluate(algo_nmf,
data,
measures=['RMSE', 'MAE'],
verbose=False)
# SlopeOne
algo_slope_one = SlopeOne()
perf_slope_one = evaluate(algo_slope_one,
data,
measures=['RMSE', 'MAE'],
verbose=False)
# CoClustering
algo_coclustering = CoClustering()
perf_coclustering = evaluate(algo_coclustering,
data,
measures=['RMSE', 'MAE'],
verbose=False)
"""Segmento que utiliza KNN para el analisis:
'k' Es el numero maximo de vecinos a tomar en cuenta para la agregacion
'min_k' El numero minimo de vecinos a tomar en cuenta para la agregacion.
Si no hay suficientes vecinos,la predicción se establece en la media global de todas las calificaciones
'sim_options' son las opciones de similitud que utiliza el knn
'bsl_options' configuracion de las estimaciones de base"""
k = 40
min_k = 1
sim_options = {
'name': 'pearson_baseline',
'user_based': 0 # no shrinkage
}
bsl_options = {'method': 'als', 'n_epochs': 5, 'reg_u': 12, 'reg_i': 5}
algo_knn_basic = KNNBasic(k=k, min_k=k, sim_options=sim_options)
perf_knn_basic = evaluate(algo_knn_basic,
data,
measures=['RMSE', 'MAE'],
verbose=False)
algo_knn_with_means = KNNWithMeans(k=k, min_k=k, sim_options=sim_options)
perf_knn_with_means = evaluate(algo_knn_with_means,
data,
measures=['RMSE', 'MAE'],
verbose=False)
algo_knn_base_line = KNNBaseline(k=k,
min_k=k,
sim_options=sim_options,
bsl_options=bsl_options)
perf_knn_base_line = evaluate(algo_knn_base_line,
data,
measures=['RMSE', 'MAE'],
verbose=False)
"""Imprimiendo resultados de los algoritmos"""
print('')
print('Printing results from algorithms...')
print('- Normal predictor')
print_perf(perf_normal_predictor)
print('')
print('- Normal SVD')
print_perf(perf_svd)
print('')
print('- Normal Baseline Only')
print_perf(perf_baseline_only)
print('')
print('- Normal SVD++')
print_perf(perf_svdpp)
print('')
print('- Normal NMF')
print_perf(perf_nmf)
print('')
print('- Normal Slope One')
print_perf(perf_slope_one)
print('')
print('- Normal Co-Clustering')
print_perf(perf_coclustering)
print('')
print('- Normal KNN Basic')
print_perf(perf_knn_basic)
print('')
print('- Normal KNN With Means')
print_perf(perf_knn_with_means)
print('')
print('- Normal KNN Base Line')
print_perf(perf_knn_base_line)
def run_svd(n_epochs, reg_all, init_mean):
start_time = time.time()
algo = SVD(n_epochs=n_epochs, reg_all=reg_all, init_mean=init_mean)
evaluate(algo, data)
running_time = time.time() - start_time
print("SVD:", running_time, " s")
from surprise import evaluate, print_perf
from surprise import GridSearch
import pandas as pd
import io
#载入数据集，该数据集是一个电影评分数据集,数据结构：uid,iid,score,time
data = Dataset.load_builtin('ml-100k')
#将数据集采用交叉验证均分为3份
data.split(n_folds=3)
'''协调过滤'''
#使用协调过滤算法
algo = KNNBasic()
#评估算法的效果，这里采用RMSE和MAE
perf = evaluate(algo, data, measures=['rmse', 'mae'])
print_perf(perf)
'''SVD分解'''
#指定参数取值范围
param_grid = {
'n_epochs': [5, 10],
'lr_all': [0.002, 0.005],
'reg_all': [0.4, 0.6]
}
#利用surprise自带的GridSearch确定最优参数
grid_search = GridSearch(SVD, param_grid, measures=['rmse', 'fcp'])
grid_search.evaluate(data)
#确定最优参数和结果
print(grid_search.best_score['rmse'])
print(grid_search.best_params['rmse'])
# In[ ]: from surprise import SVD, evaluate from surprise import NMF from surprise import KNNBasic # In[ ]: # svd algo = SVD() evaluate(algo, data, measures=['RMSE']) # In[ ]: # nmf algo = NMF() evaluate(algo, data, measures=['RMSE']) # In[ ]: # knn algo = KNNBasic()
import surprise as env
path = "input/ml-latest-small/ratings.csv"
reader = env.Reader(line_format="user item rating timestamp",
sep=",",
skip_lines=1)
data = env.Dataset.load_from_file(path, reader=reader)
data.split(n_folds=3)
algo = env.SVD()
env.evaluate(algo, data)
for i in open('C:\\Users\\Dimple Shah\\Desktop\\mtech\\reco\\3l.csv',
'r').readlines()
]
ratings_df1 = pd.DataFrame(ratings_list1,
columns=['UserID', 'BookID', 'Rating'],
dtype=float)
ratings_df1.loc[:, 'Rating'] = sk.minmax_scale(ratings_df1.loc[:, 'Rating'])
data1 = Dataset.load_from_df(ratings_df1[['UserID', 'BookID', 'Rating']],
reader)
data1.split(2) # split data for 2-folds cross validation
algo1 = MatrixFacto(learning_rate=.01, n_epochs=10, n_factors=10) #print(algo)
#test_rms=
result1 = surprise.evaluate(algo1, data1, measures=['RMSE']) #print(test_rms)
x.append(np.mean(result1['RMSE']))
end = time.time()
#print("Time1",end - start)
timex.append(end - start)
process = psutil.Process(os.getpid())
m2 = process.memory_full_info().uss
#m2=m2-m1
print(m2)
mem.append(m2)
#Checking RMSE with 500k data records
start = time.time()
ratings_list2 = [
i.strip().split(",")
print('-' * 12)
print('-' * 12)
return hr, arhr
if __name__ == '__main__':
# builtin dataset
# data = env.Dataset.load_builtin('ml-100k')
# =============================== load data ============================
# ml-latest-small
# file_path = 'input/ml-latest-small/ratings.csv'
# reader = env.Reader(line_format='user item rating timestamp', sep=',', skip_lines=1)
# ------------------------------------------------------------------------------
# ml-100k
file_path = 'input/ml-100k/u.data'
reader = env.Reader(line_format='user item rating timestamp', sep='\t', skip_lines=1)
# ------------------------------------------------------------------------------
# ml-20m
# file_path = 'input/ml-20m/ratings.csv'
# reader = env.Reader(line_format='user item rating timestamp', sep=',', skip_lines=1)
# ==============================================================================
data = env.Dataset.load_from_file(file_path, reader=reader)
data.split(n_folds=5)
algo = env.SVDpp()
# evaluate_topn(algo, data, top_n=100, threshold=3, verbose=1)
env.evaluate(algo, data, measures=['rmse', 'mae', 'fcp'], verbose=1)
from surprise import SVD
from surprise import Reader
from surprise import Dataset
from surprise import evaluate
import pandas as pd
from pandas import plotting
import matplotlib.pyplot as plt
import warnings
warnings.simplefilter('ignore')
reader = Reader()
ratings = pd.read_csv('./tmdb-5000-movie-dataset/ratings.csv')
ratings.head()
data = Dataset.load_from_df(ratings[['userId', 'movieId', 'rating']], reader)
data.split(n_folds=5)
svd = SVD()
evaluate(svd, data, measures=['RMSE', 'MAE'])
trainset = data.build_full_trainset()
svd.fit(trainset)
X = raw_input("Select a UserId")
Y = raw_input("Select a MovieId")
print(svd.predict(int(X),int(Y) ,3))
# ml-latest-small
# file_path = 'input/ml-latest-small/ratings.csv'
# reader = env.Reader(line_format='user item rating timestamp', sep=',', skip_lines=1)
# ------------------------------------------------------------------------------
# ml-100k
file_path = 'input/ml-100k/u.data'
reader = env.Reader(line_format='user item rating timestamp',
sep='\t',
skip_lines=1)
# ------------------------------------------------------------------------------
# ml-20m
# file_path = 'input/ml-20m/ratings.csv'
# reader = env.Reader(line_format='user item rating timestamp', sep=',', skip_lines=1)
# ==============================================================================
data = env.Dataset.load_from_file(file_path, reader=reader)
data.split(n_folds=5)
# define algorithm
algo = WAPR(learning_rate=0.01,
factor_num=20,
epoch_num=1,
batch_num=512,
alpha=0.01,
eps=1e-2,
random=False)
# evaluate
# topn.evaluate_topn(algo, data, top_n=100, threshold=4.5)
env.evaluate(algo, data, measures=['fcp'])
AlgoBase.train(self, trainset)
# Compute baselines and similarities
self.bu, self.bi = self.compute_baselines()
self.sim = self.compute_similarities()
def estimate(self, u, i):
if not (self.trainset.knows_user(u) and self.trainset.knows_item(i)):
raise PredictionImpossible('User and/or item is unkown.')
# Compute similarities between u and v, where v describes all other
# users that have also rated item i.
neighbors = [(v, self.sim[u, v]) for (v, r) in self.trainset.ir[i]]
# Sort these neighbors by similarity
neighbors = sorted(neighbors, key=lambda x: x[1], reverse=True)
print('The 3 nearest neighbors of user', str(u), 'are:')
for v, sim_uv in neighbors[:3]:
print('user {0:} with sim {1:1.2f}'.format(v, sim_uv))
# ... Aaaaand return the baseline estimate anyway ;)
bsl = self.trainset.global_mean + self.bu[u] + self.bi[i]
return bsl
data = Dataset.load_builtin('ml-100k')
algo = MyOwnAlgorithm()
evaluate(algo, data)
data = Dataset.load_from_file(file_path, reader=reader)
data.split(n_folds=5)
sim_options = {
'name': 'pearson_baseline',
'shrinkage': 0 # no shrinkage
}
knnbasic_ambiente = KNNBasic()
k_neig = np.array([40, 45, 50, 60])
for i in range(0, len(k_neig)):
knnbasic_ambiente = KNNBasic(k=k_neig[i])
perf = evaluate(knnbasic_ambiente,
data,
measures=['RMSE', 'MAE'],
verbose=0)
print('K es ', k_neig[i], 'media', np.array(perf['rmse']).mean())
#mejor k de ambiente es 40
knnbasic_ambiente = KNNBasic(k=40)
# Retrieve the trainset.
trainset = data.build_full_trainset()
knnbasic_ambiente.train(trainset)
from sklearn.externals import joblib
joblib.dump(knnbasic_ambiente, 'knnbasic_ambiente.pkl')
####comida knn######