def kernel(input1, ker, arg, input2=None):
if input2 is None:
input1 = input1.T
if ker == 'linear':
K = kernels.linear_kernel(input1)
# polynomial은 미구현. 파라미터가 좀 다른듯...
# if ker == 'poly':
# K = kernels.polynomial_kernel(input, )
if ker == 'rbf':
gamma = (0.5 / (arg * arg))
K = kernels.rbf_kernel(input1, gamma=gamma)
if ker == 'sigmoid':
K = kernels.sigmoid_kernel(input1, gamma=arg[0], coef0=arg[1])
return K
else:
input1 = input1.T
input2 = input2.T
if ker == 'linear':
K = kernels.linear_kernel(input1, input2)
# polynomial은 미구현. 파라미터가 좀 다른듯...
# if ker == 'poly':
# K = kernels.polynomial_kernel(input, )
if ker == 'rbf':
gamma = (0.5 / (arg * arg))
K = kernels.rbf_kernel(input1, input2, gamma=gamma)
if ker == 'sigmoid':
K = kernels.sigmoid_kernel(input1, input2, gamma=arg[0], coef0=arg[1])
return K
def kernelMatrix(self, X, y=None):
if self.K_type == 'linear':
"""
if y != None:
if self.mu == None:
reg = Lasso(self.param) #TODO change with a model for classification and let the possibility to specify regression or classification
self_mu = reg.fit(X, y).coef_
self.Xtr = self.Xtr[:, mp.where(self_mu != 0)]
self.X = self.X[:, mp.where(self_mu != 0)]
"""
if self.normalize:
self.K = normalize(linear_kernel(X, self.Xtr))
else:
self.K = linear_kernel(X, self.Xtr)
return self.K
if self.K_type == 'polynomial':
if self.normalize:
self.K = normalize(
polynomial_kernel(X, self.Xtr, degree=self.param))
else:
self.K = polynomial_kernel(X, self.Xtr, degree=self.param)
return self.K
if self.K_type == 'gaussian':
if self.normalize:
self.K = normalize(rbf_kernel(X, self.Xtr, gamma=self.param))
else:
self.K = rbf_kernel(X, self.Xtr, gamma=self.param)
return self.K
if self.K_type == 'laplacian':
if self.normalize:
self.K = normalize(
laplacian_kernel(X, self.Xtr, gamma=self.param))
else:
self.K = laplacian_kernel(X, self.Xtr, gamma=self.param)
return self.K
if self.K_type == 'sigmoid':
if self.normalize:
self.K = normalize(
sigmoid_kernel(X, self.Xtr, gamma=self.param))
else:
self.K = sigmoid_kernel(X, self.Xtr, gamma=self.param)
return self.K
def recommend(search_word):
movie_df = pre_process()
tfv = vectorizer(min_df=3,
max_features=None,
strip_accents='unicode',
analyzer='word',
token_pattern=r'\w{1,}',
ngram_range=(1, 3),
stop_words='english')
tfv_matrix = tfv.fit_transform(movie_df['bow'])
sig = sigmoid_kernel(tfv_matrix, tfv_matrix)
index = pd.Series(movie_df.index,
index=movie_df['original_title']).drop_duplicates()
try:
idx = index[search_word]
sig_scores = list(enumerate(sig[idx]))
sig_scores = sorted(sig_scores, key=lambda x: x[1], reverse=True)
sig_scores = sig_scores[1:15]
movie_indices = [i[0] for i in sig_scores]
return list(movie_df['original_title'].iloc[movie_indices])
except:
return None
def product_recommendation(title):
tfidf_v = TfidfVectorizer(
max_features=None,
strip_accents="unicode",
analyzer="word",
min_df=10,
token_pattern=r"\w{1,}",
ngram_range=(1,
3), #take the combination of 1-3 different kind of words
stop_words="english")
products["description"] = products["description"].fillna("")
products["product_name"] = products["product_name"].str.lower()
tfidf_matrix = tfidf_v.fit_transform(products["description"])
sig = sigmoid_kernel(tfidf_matrix, tfidf_matrix)
indices = pd.Series(products.index,
index=products["product_name"]).drop_duplicates()
index = indices.get(title.lower())
if index is not None:
sorted_sig_scores = list(enumerate(sig[index]))
sorted_sig_scores = sorted(sorted_sig_scores,
key=lambda item: item[1],
reverse=True)
top_10_products = [sorted_sig_scores[i][0] for i in range(0, 11)]
return products["product_name"].iloc[top_10_products].unique()
return [index]
def reset_vec(self, kernel='rbf_ap'):
feat = preprocessing.scale(self.fake_features)
count = feat.shape[1]
if kernel == 'rbf':
temp = rbf_kernel(feat, gamma=1.0 / count).sum(axis=0)
elif kernel == 'cos':
temp = ((cosine_similarity(feat) + 1) / 2.0).sum(axis=0)
elif kernel == 'euc':
temp = (1.0 / (euclidean_distances(feat) + 1)).sum(axis=0)
elif kernel == 'sigmoid':
Sig = sigmoid_kernel(feat, coef0=0, gamma=1.0 / count)
temp = ((Sig + 1.0) / 2.0).sum(axis=0)
elif kernel == 'rbf_ap':
gamma = 1.0 / count
expVec = np.exp(-gamma * np.einsum("ij, ij -> i", feat, feat))
feaVec = np.einsum("i, ij -> j", expVec, feat) * (2.0 * gamma)
outMat = np.einsum("i,ij,ik->jk", expVec, feat, feat)
outMat *= (2.0 * gamma**2)
first = expVec * np.sum(expVec)
second = np.einsum("i, j, ij -> i", expVec, feaVec, feat)
third = np.einsum("i, jk, ij, ik -> i", expVec, outMat, feat, feat)
temp = first + second + third
return (temp / np.sum(temp))
def _apply_kernel(self, x, y):
"""Apply the selected kernel function to the data."""
if self.kernel == 'linear':
phi = linear_kernel(x, y)
elif self.kernel == 'rbf':
phi = rbf_kernel(x, y, self.coef1)
elif self.kernel == 'poly':
phi = polynomial_kernel(x, y, self.degree, self.coef1, self.coef0)
elif self.kernel == 'sigmoid':
coef0 = self.coef0 if self.coef0 is not None else 1
phi = sigmoid_kernel(x, y, self.gamma, coef0)
elif self.kernel == 'chi2':
gamma = self.gamma if self.gamma is not None else 1
phi = chi2_kernel(x, y, self.gamma)
elif self.kernel == 'laplacian':
phi = laplacian_kernel(x, y, self.gamma)
elif callable(self.kernel):
phi = self.kernel(x, y)
if len(phi.shape) != 2:
raise ValueError(
"Custom kernel function did not return 2D matrix")
if phi.shape[0] != x.shape[0]:
raise ValueError(
"Custom kernel function did not return matrix with rows"
" equal to number of data points."
"")
else:
raise ValueError("Kernel selection is invalid.")
if self.bias_used:
phi = np.append(phi, np.ones((phi.shape[0], 1)), axis=1)
return phi
def tf_sig(tfidf_matrix):
print "Using TFIDF with sigmoid kernel"
Ke = sigmoid_kernel(tfidf_matrix[0:1],tfidf_matrix)
K=Ke[0]
top = np.argsort(K)[-11:]
for i in range(10):
print (10-i),Total[top[9-i]-1]
def _get_kernel_matrix(self, X1, X2):
# K is len(X1)-by-len(X2) matrix
if self._kernel == 'rbf':
K = pairwise.rbf_kernel(X1, X2, gamma=self._gamma)
elif self._kernel == 'poly':
K = pairwise.polynomial_kernel(X1,
X2,
degree=self._degree,
gamma=self._gamma,
coef0=self._coef0)
elif self._kernel == 'linear':
K = pairwise.linear_kernel(X1, X2)
elif self._kernel == 'laplacian':
K = pairwise.laplacian_kernel(X1, X2, gamma=self._gamma)
elif self._kernel == 'chi2':
K = pairwise.chi2_kernel(X1, X2, gamma=self._gamma)
elif self._kernel == 'additive_chi2':
K = pairwise.additive_chi2_kernel(X1, X2)
elif self._kernel == 'sigmoid':
K = pairwise.sigmoid_kernel(X1,
X2,
gamma=self._gamma,
coef0=self._coef0)
else:
print('[Error] Unknown kernel')
K = None
return K
def hsh_sig(hash_matrix):
print "Using Hashing with sigmoid kernel"
Ke = sigmoid_kernel(hash_matrix[0:1],hash_matrix)
K=Ke[0]
top = np.argsort(K)[-11:]
for i in range(10):
print (10-i),Total[top[9-i]-1]
def cal_km(params, X_fit, X, type):
if type == 'interface':
if params['kernel'] == 'linear':
km = linear_kernel(X_fit, X)
elif params['kernel'] == 'rbf':
km = rbf_kernel(X_fit, X, gamma=params['gamma'])
elif params['kernel'] == 'poly':
km = polynomial_kernel(X_fit, X, gamma=params['gamma'], coef0=0.0)
elif params['kernel'] == 'sigmoid':
km = sigmoid_kernel(X_fit, X, gamma=params['gamma'], coef0=0.0)
else:
print('Unknown kernel')
km = None
elif type == 'realize':
if params['kernel'] == 'linear':
km = cal_linear(X_fit, X)
elif params['kernel'] == 'rbf':
km = cal_rbf(X_fit, X, gamma=params['gamma'])
elif params['kernel'] == 'poly':
km = cal_poly(X_fit, X, gamma=params['gamma'])
elif params['kernel'] == 'sigmoid':
km = cal_sigmoid(X_fit, X, gamma=params['gamma'])
else:
print('Unknown kernel')
km = None
else:
print('Unknown type')
km = None
return km
def cnt_sig(count_matrix):
print "Using Count with sigmoid kernel"
Ke = sigmoid_kernel(count_matrix[0:1],count_matrix)
K=Ke[0]
top = np.argsort(K)[-11:]
for i in range(10):
print (10-i),Total[top[9-i]-1]
def margin_kernel(self, X1, kernel_type = 'linear', gamma =1.0):
"""
Forms the kernel matrix using the samples X1
Parameters:
----------
X1: np.ndarray
data (n_samples,n_features) to form a kernel of shape (n_samples,n_samples)
kernel_type : str
type of kernel to be used
gamma: float
kernel parameter
Returns:
-------
X: np.ndarray
the kernel of shape (n_samples,n_samples)
"""
if(kernel_type == 'linear'):
X = linear_kernel(X1,X1)
elif(kernel_type == 'rbf'):
X = rbf_kernel(X1,X1,gamma)
elif(kernel_type == 'tanh'):
X = sigmoid_kernel(X1,X1,-gamma)
elif(kernel_type == 'sin'):
# X = np.sin(gamma*manhattan_distances(X1,X1))
X = np.sin(gamma*pairwise_distances(X1,X1)**2)
elif(kernel_type =='TL1'):
X = np.maximum(0,gamma - manhattan_distances(X1,X1))
else:
print('no kernel_type, returning None')
return None
return X
def kernel_mean_matching(self, X, Z, kern='lin', B=1.0, eps=None):
nx = X.shape[0]
nz = Z.shape[0]
print("nx: ", nx, " nz: ", nz)
if eps == None:
eps = B / math.sqrt(nz)
if kern == 'lin':
K = np.dot(Z, Z.T)
K = K.todense()
kappa = np.sum(np.dot(Z, X.T) * float(nz) / float(nx), axis=1)
elif kern == 'rbf':
K = sk.rbf_kernel(Z, Z)
kappa = np.sum(sk.rbf_kernel(Z, X), axis=1) * float(nz) / float(nx)
elif kern == 'poly':
K = sk.polynomial_kernel(Z, Z)
kappa = np.sum(sk.polynomial_kernel(Z, X),
axis=1) * float(nz) / float(nx)
elif kern == 'laplacian':
K = sk.laplacian_kernel(Z, Z)
kappa = np.sum(sk.laplacian_kernel(Z, X),
axis=1) * float(nz) / float(nx)
elif kern == 'sigmoid':
K = sk.sigmoid_kernel(Z, Z)
kappa = np.sum(sk.sigmoid_kernel(Z, X),
axis=1) * float(nz) / float(nx)
else:
raise ValueError('unknown kernel')
K = K.astype(np.double)
K = matrix(K)
kappa = matrix(kappa)
G = matrix(np.r_[np.ones((1, nz)), -np.ones((1, nz)),
np.eye(nz), -np.eye(nz)])
h = matrix(np.r_[nz * (1 + eps), nz * (eps - 1), B * np.ones((nz, )),
np.zeros((nz, ))])
print("starting solver")
solvers.options['show_progress'] = False
sol = solvers.qp(K, -kappa, G, h)
print(sol)
coef = np.array(sol['x'])
return coef
def rec_hotel(amenities, city):
my_dataframe = pd.DataFrame({
'Rating': travel_df['Rating'],
'Amenities': travel_df['Amenities'],
'Hotel Names': travel_df['Hotel Names'],
'City': travel_df['City'],
'Address': travel_df['Address']
})
df = pd.DataFrame({
"Rating": 2,
"Amenities": amenities,
"Hotel Names": ['abc'],
"City": [city]
})
# print(df)
my_dataframe = my_dataframe.append(df, ignore_index=True)
my_dataframe = my_dataframe[my_dataframe['City'] == city]
my_dataframe.reset_index(inplace=True)
# print(my_dataframe.iloc[-1])
# print(my_dataframe)
# print(df.columns)
tfv = TfidfVectorizer(min_df=3,
max_features=None,
strip_accents='unicode',
analyzer='word',
token_pattern=r'\w{1,}',
ngram_range=(1, 3),
stop_words='english')
# Filling NaNs with empty string
my_dataframe['Amenities'] = my_dataframe['Amenities'].fillna('')
# print(amenities)
# Fitting the TF-IDF on the 'Amenities' text
tfv_matrix = tfv.fit_transform(my_dataframe['Amenities'])
# Compute the sigmoid kernel
sig = sigmoid_kernel(tfv_matrix, tfv_matrix)
my_ratings = np.array(
my_dataframe[my_dataframe['City'] == city]['Rating']) / 5
indices = pd.Series(
my_dataframe.index,
index=my_dataframe['Hotel Names']).drop_duplicates()
# print(indices)
idx = indices['abc']
# l=np.add(sig[idx]*0.5,my_ratings)
# print("rating:",my_ratings.shape,"sig:",sig[idx].shape)
# Get the pairwsie similarity scores
sig_scores = list(enumerate(sig[idx]))
# Sort the hotels
sig_scores = sorted(sig_scores, key=lambda x: x[1], reverse=True)
# Scores of the 5 most similar hotels
sig_scores = sig_scores[2:7]
# Movie indices
hotel_indices = [i[0] for i in sig_scores]
my_dataframe = my_dataframe.iloc[:-1, :]
return my_dataframe[['Hotel Names', 'Address',
'Rating']].iloc[hotel_indices]
def abc():
data = pd.read_csv('final.csv')
tfv = TfidfVectorizer(min_df = 3, max_features = None, strip_accents = 'unicode', analyzer = 'word', token_pattern = r'\w{1,}', ngram_range = (1, 3), stop_words = 'english')
tfv_matrix = tfv.fit_transform(data['DESCRIPTION'])
sig = sigmoid_kernel(tfv_matrix, tfv_matrix)
indices = pd.Series(data.index, index = data['TRACK NAME']).drop_duplicates()
return data, sig, indices
def ResetProbVec(self, kernel='rbf_ap'):
"""
Calculate the reset probability vector with assigned kernel
rbf: Radial basis function
cos: (cosine similarity + 1) / 2.0
euc: 1.0 / (1 + euclidean distances)
sigmoid: (tanh(gamma <X_i, X_j>) + 1) / 2.0
rbf_ap: Taylor-expansion approximated Radial basis function
"""
if kernel == 'rbf':
RBF = rbf_kernel(self.featMat, gamma=1.0 / self.featCount)
RBF = RBF.sum(axis=0)
resetProbVec = RBF / np.sum(RBF)
elif kernel == 'cos':
Cos = (cosine_similarity(self.featMat) + 1) / 2.0
Cos = Cos.sum(axis=0)
resetProbVec = Cos / np.sum(Cos)
elif kernel == 'euc':
Euc = 1.0 / (euclidean_distances(self.featMat) + 1)
Euc = Euc.sum(axis=0)
resetProbVec = Euc / np.sum(Euc)
elif kernel == 'sigmoid':
gamma = 1.0 / self.featCount
Sig = sigmoid_kernel(self.featMat, coef0=0, gamma=gamma)
Sig = (Sig + 1.0) / 2.0
Sig = Sig.sum(axis=0)
resetProbVec = Sig / np.sum(Sig)
elif kernel == 'rbf_ap':
parameter = 1.0 / self.featCount
# w
lengths = np.einsum("ij, ij -> i", self.featMat, self.featMat)
expNormVector = np.exp(-parameter * lengths)
# y
f_normVec = np.einsum("i, ij -> j", expNormVector, self.featMat)
featureNormVector = f_normVec * (2.0 * parameter)
# Z
outerMat = np.einsum("i, ij, ik -> jk", expNormVector,
self.featMat, self.featMat)
featureOuterNorm = outerMat * (2.0 * parameter**2)
# r'
first = expNormVector * np.sum(expNormVector)
second = np.einsum("i, j, ij -> i", expNormVector,
featureNormVector, self.featMat)
third = np.einsum("i, jk, ij, ik -> i", expNormVector,
featureOuterNorm, self.featMat, self.featMat)
resetProbVec = first + second + third
# r
resetProbVec /= np.sum(resetProbVec)
self.resetProbVec = resetProbVec
def kernel_func(X1, X2, kernel_name, gamma, d, r):
if kernel_name == 'rbf':
return rbf_kernel(X1, X2, gamma=gamma)
elif kernel_name == 'polynomial':
return polynomial_kernel(X1, X2, gamma=gamma, degree=d, coef0=r)
elif kernel_name == 'sigmoid':
return sigmoid_kernel(X1, X2, gamma=gamma, coef0=r)
elif kernel_name == 'linear':
return linear_kernel(X1, X2)
else:
raise NotImplementedError
def gen_similarity(args, X):
if args.sim_method == 'sigmoid_kernel':
sim_UXU = sigmoid_kernel(X=X, Y=None, gamma=None, coef0=1)
sim_MXM = sigmoid_kernel(X=X.T, Y=None, gamma=None, coef0=1)
elif args.sim_method == 'cosine_similarity':
sim_UXU = cosine_similarity(X=X, Y=None)
sim_MXM = cosine_similarity(X=X.T, Y=None)
## =====================================================================
# Save similarity matrix
fn_str = args.RESULTPATH + 'sim_%s_UXU.npy' % (args.sim_method)
with open(fn_str, 'wb') as f:
pickle.dump(sim_UXU, f)
fn_str = args.RESULTPATH + 'sim_%s_MXM.npy' % (args.sim_method)
with open(fn_str, 'wb') as f:
pickle.dump(sim_MXM, f)
print('saving similarity matrix is done!')
## =====================================================================
return sim_UXU, sim_MXM
def calc_gaussian_sim(data_matrix, method):
if method == "rbf":
return rbf_kernel(data_matrix)
elif method == "chi2":
return chi2_kernel(data_matrix)
elif method == "laplacian":
return laplacian_kernel(data_matrix)
elif method == "sigmoid":
return sigmoid_kernel(data_matrix)
else:
raise ValueError("Wron method parameter ind calc_gaussian_sim()")
def transform(self, X, Y):
if self.type == 'rbf':
return rbf_kernel(X, Y, self.gamma)[0]
elif self.type == 'Chi2':
return chi2_kernel(X, Y, self.gamma)[0]
elif self.type == 'AChi2':
return -additive_chi2_kernel(X, Y)[0]
elif self.type == 'laplacian':
return laplacian_kernel(X, Y, self.gamma)[0]
elif self.type == 'sigmoid':
return sigmoid_kernel(X, Y, self.gamma, self.coef0)[0]
def calculate_gram_matrix(x, kernel='linear', gamma=0, degree=0, coef0=0):
if kernel == 'linear':
gram = linear_kernel(x, x)
elif kernel == 'poly':
gram = polynomial_kernel(x, x, degree=degree, gamma=gamma, coef0=coef0)
elif kernel == 'sigmoid':
gram = sigmoid_kernel(x, x, gamma=gamma, coef0=coef0)
elif kernel == 'rbf':
gram = rbf_kernel(x, x, gamma=gamma)
else:
raise ValueError
return gram
def _apply_kernel(self, X, Y):
if self.kernel == "rbf":
return rbf_kernel(X, Y, self.gamma)
elif self.kernel == "sigmoid":
return sigmoid_kernel(X, Y, self.gamma, self.coef0)
elif self.kernel == "poly":
return polynomial_kernel(X, Y, self.degree, self.gamma, self.coef0)
elif self.kernel == "linear":
return linear_kernel(X, Y)
elif callable(self.kernel):
return self.kernel(X, Y)
else:
raise ValueError("Unknown kernel: " + str(self.kernel))
def preprocessing():
# Model defination with the feature declaration
tfv = TfidfVectorizer(min_df=3, max_features=None, strip_accents='unicode', analyzer='word', token_pattern=r'\w{1,}', ngram_range=(1, 5), stop_words='english')
# Filling NaNs with empty string
js['ArticleTitle'] = js['ArticleTitle'].fillna('')
tfv_matrix = tfv.fit_transform(js['ArticleTitle'])
# Compute the sigmoid kernel
sig = sigmoid_kernel(tfv_matrix, tfv_matrix)
# Generate the indices for the recommender system, removing the duplicates
indices = pd.Series(js.index, index=js['ArticleFullPath'
]).drop_duplicates()
#returning the indices and sigmoid kernel matrix
return indices, sig
def call_recommend(m):
m = m.lower()
movie = pd.read_csv('movie_data_final.csv')
# check if the movie is in our database or not
if m not in movie['original_title'].unique():
return (
'This movie is not in our database.\nPlease check if you spelled it correct.'
)
else:
## Content Based Recommendation System
### Using Tf-IDF Vectorizer to formulate vectorization matrix
tf = TfidfVectorizer(min_df=3,
max_features=None,
strip_accents='unicode',
analyzer='word',
token_pattern=r'\w{1,}',
ngram_range=(1, 3),
stop_words='english')
#Fitting the TF-IDF on 'overview' text
tf_matrix = tf.fit_transform(movie['overview'].values.astype('U'))
#Compute sigmoid kernel
sig = sigmoid_kernel(tf_matrix, tf_matrix)
#Reverse mapping of indices and movie titles
indices = pd.Series(movie.index,
index=movie['original_title']).drop_duplicates()
#Get the corresponding to original_title
index = indices[m]
#Get the pairwise similiarity scores
sig_scores = list(enumerate(sig[index]))
#Sort the movies
sig_scores = sorted(sig_scores, key=lambda x: x[1], reverse=True)
#Score of 10 most similar movies
sig_scores = sig_scores[1:11]
#Movie indices
movie_indices = [i[0] for i in sig_scores]
movieList = movie['original_title'].iloc[movie_indices]
#movieList.columns = ['Movie Name','Rating']
#movieList = movieList.sort_values(['Rating'],ascending=False)
#Top 10 most similar movies
return movieList
def recommendation(input_json, input_param):
# FETCHING DATA FROM API
counter = 0
job_recommended = []
jobs = input_json
# Getting user input - insert to list
input_value = [{'title': 'INPUT', 'description': input_param}]
title = input_value[0].get('title')
added_jobs = jobs.append(input_value, ignore_index=True, sort=False)
# Term frequency and inverse document frequency
tfv = TfidfVectorizer(min_df=0,
max_features=None,
strip_accents='unicode',
analyzer='word',
token_pattern=r'\w{1,}',
ngram_range=(1, 3),
stop_words='english')
added_jobs['description'] = added_jobs['description'].fillna('')
tfv_matrix = tfv.fit_transform(added_jobs['description'])
# Sigmoid kernel for Sigmoid calculationsa
sig = sigmoid_kernel(tfv_matrix, tfv_matrix)
indices = pd.Series(added_jobs.index, index=added_jobs['title'])
# Search for the very peculiar input
jobs_list_length = len(added_jobs)
jobs_last = jobs_list_length - 1
for i in range(jobs_list_length):
# 0.7615941559557649 is sigmoid value for very peculiar input
if sig[jobs_last][i] <= 0.7615941559557649:
counter += 1
if counter >= jobs_last:
return None
else:
# Getting final result
id_input = indices[title]
sig_scores = list(enumerate(sig[id_input]))
sig_scores = sorted(sig_scores, key=lambda x: x[1], reverse=True)
sig_scores = sig_scores[1:15]
job_indices = [i[0] for i in sig_scores]
for job in job_indices:
job_dic = {'title': added_jobs['title'].iloc[job]}
job_recommended.append(job_dic)
# # Return all recommended titles
return job_recommended
def get_recommendations(movie_id):
sql_engine = create_engine(os.path.join('sqlite:///' +
os.path.join(basedir, 'site.db')),
echo=False)
movies_results = pd.read_sql_query('select movie_id,genres from Movie',
sql_engine)
movies_results.to_csv(os.path.join(basedir, 'Movie.csv'),
index=False,
sep=";")
user_movies_results = pd.read_sql_query('select movie_id from Credits',
sql_engine)
user_movies_results.to_csv(os.path.join(basedir, 'Credits.csv'),
index=False,
sep=";")
movies_df = pd.read_csv(os.path.join(basedir, 'Movie.csv'), sep=';')
user_df = pd.read_csv(os.path.join(basedir, 'Credits.csv'), sep=';')
user_df.drop_duplicates(subset='movie_id', inplace=True)
user_df.reset_index(drop=True, inplace=True)
movies_df_merge = movies_df.merge(user_df, on='movie_id')
tfv = TfidfVectorizer(min_df=3,
max_features=None,
strip_accents='unicode',
analyzer='word',
token_pattern=r'\w{1,}',
ngram_range=(1, 3),
stop_words='english')
tfv_matrix = tfv.fit_transform(movies_df_merge['genres'])
indices = pd.Series(movies_df_merge.index,
index=movies_df_merge['movie_id']).drop_duplicates()
sig = sigmoid_kernel(tfv_matrix, tfv_matrix)
# Get the index corresponding to original_title
idx = indices[movie_id]
# Get the pairwsie similarity scores
sig_scores = list(enumerate(sig[idx]))
# Sort the movies
sig_scores = sorted(sig_scores, key=lambda x: x[1], reverse=True)
# Scores of the 10 most similar movies
sig_scores = sig_scores[1:]
# Movie indices
movie_indices = [i[0] for i in sig_scores]
# Top 10 most similar movies
rem_movie = list(movies_df_merge['movie_id'].iloc[movie_indices])
return rem_movie
def tanhFunc():
if self.parameters["kernel"].__contains__("gamma"):
g = self.parameters["kernel"]["gamma"]
else:
g = 0.01
if self.parameters["kernel"].__contains__("offset"):
c = self.parameters["kernel"]["offset"]
else:
c = 1
K = smp.sigmoid_kernel(X, Y, gamma=g, coef0=c)
return K
def train_and_test (self, dataTest, realOutput=None, aval=False, reg=0.01, deg=3, gamm=None, coef=1):
if self.kernelType == 'rbf':
K = rbf_kernel(self.inTrain, self.inTrain, gamm)
Ktest = rbf_kernel(dataTest, self.inTrain, gamm)
elif self.kernelType == 'pol':
K = polynomial_kernel(self.inTrain, self.inTrain, deg, gamm, coef)
Ktest = polynomial_kernel(dataTest, self.inTrain, deg, gamm, coef)
elif self.kernelType == 'sig':
K = sigmoid_kernel(self.inTrain, self.inTrain, gamm, coef)
Ktest = sigmoid_kernel(dataTest, self.inTrain, gamm, coef)
I = np.eye(self.inTrain.shape[0])
outNet = np.dot (np.dot(Ktest, np.linalg.inv(K + reg*I)), self.outTrain)
if aval:
miss = float(cont_error (realOutput, outNet))
si = float(outNet.shape[0])
acc = (1-miss/si)*100
print 'Miss classification on the test: ', miss, ' of ', si, ' - Accuracy: ',acc , '%'
return outNet, acc
return outNet, None
def process():
global movie_df, sig, index
movie_df = pre_process()
tfv = vectorizer(min_df=3,
max_features=None,
strip_accents='unicode',
analyzer='word',
token_pattern=r'\w{1,}',
ngram_range=(1, 3),
stop_words='english')
tfv_matrix = tfv.fit_transform(movie_df['overview'])
sig = sigmoid_kernel(tfv_matrix, tfv_matrix)
index = pd.Series(movie_df.index,
index=movie_df['title']).drop_duplicates()
def calculateMultipleKernel(x, y):
theta = random.sample(range(1, 47), 46) # given a random theta for now
# Convert our 2d arrays to numpy arrays
x = np.array(x)
y = np.array(y)
# Reshape the array-like input vectors since we only have one sample
x = x.reshape(1, -1)
y = y.reshape(1, -1)
# Variables to aggregate the kernel result
kernelResult = 0
index = 0
for i in range(0, 3):
kernelResult += theta[index] * additive_chi2_kernel(x, y)
index += 1
for i in range(0, 3):
kernelResult += theta[index] * chi2_kernel(x, y, theta[index + 1])
index += 2
for i in range(0, 3):
kernelResult += theta[index] * cosine_similarity(x, y)
index += 1
for i in range(0, 3):
kernelResult += theta[index] * linear_kernel(x, y)
index += 1
for i in range(0, 3):
kernelResult += theta[index] * polynomial_kernel(
x, y, theta[index + 1], theta[index + 2], theta[index + 3])
index += 4
for i in range(0, 3):
kernelResult += theta[index] * rbf_kernel(x, y, theta[index + 1])
index += 2
for i in range(0, 3):
kernelResult += theta[index] * laplacian_kernel(x, y, theta[index + 1])
index += 2
for i in range(0, 3):
kernelResult += theta[index] * sigmoid_kernel(x, y, theta[index + 1])
index += 2
return kernelResult
def calculateMultipleKernel(x, y):
theta = random.sample(range(1,47),46) # given a random theta for now
# Convert our 2d arrays to numpy arrays
x = np.array(x)
y = np.array(y)
# Reshape the array-like input vectors since we only have one sample
x = x.reshape(1,-1)
y = y.reshape(1,-1)
# Variables to aggregate the kernel result
kernelResult = 0;
index = 0;
for i in range(0,3):
kernelResult += theta[index] * additive_chi2_kernel(x,y)
index += 1
for i in range(0,3):
kernelResult += theta[index] * chi2_kernel(x,y,theta[index+1])
index += 2
for i in range(0,3):
kernelResult += theta[index] * cosine_similarity(x,y)
index += 1
for i in range(0,3):
kernelResult += theta[index] * linear_kernel(x,y)
index += 1
for i in range(0,3):
kernelResult += theta[index] * polynomial_kernel(
x,y,theta[index+1],theta[index+2], theta[index+3])
index += 4
for i in range(0,3):
kernelResult += theta[index] * rbf_kernel(x,y,theta[index+1])
index += 2
for i in range(0,3):
kernelResult += theta[index] * laplacian_kernel(x,y,theta[index+1])
index += 2
for i in range(0,3):
kernelResult += theta[index] * sigmoid_kernel(x,y,theta[index+1])
index += 2
return kernelResult
def compare_data(self):
# getting all movies that are animated or not depending on the movie searched
data = Movies.query.filter_by(animation=self.movie_details.animation)
# Converting the list of SQLalchemy movies objects into a data frame of movies
movie_data_frame = pd.DataFrame([(d.title, d.overview, d.image, d.popularity, d.release_date) for d in data],
columns=['title', 'overview', 'image', 'popularity', 'release_date'])
# Specifying parameters for the comparison
tfv = TfidfVectorizer(min_df=1, max_features=None, strip_accents='unicode', analyzer='word',
token_pattern=r'\w{1,}', ngram_range=(1, 3), stop_words='english')
# Specify the column for the comparison
tfv_matrix = tfv.fit_transform(movie_data_frame['overview'])
# Form a matrix
sig = sigmoid_kernel(tfv_matrix, tfv_matrix)
# Remove duplicate movies and index them
indices = pd.Series(movie_data_frame.index, index=movie_data_frame['title']).drop_duplicates()
return movie_data_frame, sig, indices
def kernel_function(self, x1, x2):
features = []
# linear kernel:
# Cosine distance
features += np.squeeze(1 -
pairwise.paired_cosine_distances(x1, x2)[0]),
# Manhanttan distance
features += pairwise.paired_manhattan_distances(x1, x2)[0],
# Euclidean distance
features += pairwise.paired_euclidean_distances(x1, x2)[0],
# Chebyshev distance
features += pairwise.pairwise_distances(x1, x2,
metric="chebyshev")[0][0],
# stat kernel:
# Pearson coefficient
pearson = stats.pearsonr(np.squeeze(np.asarray(x1)),
np.squeeze(np.asarray(x2)))[0]
features += 0 if np.isnan(pearson) else pearson,
# Spearman coefficient
spearman = stats.spearmanr(x1, x2, axis=1).correlation
features += 0 if np.isnan(spearman) else spearman,
# Kendall tau coefficient
kendall = stats.kendalltau(x1, x2).correlation
features += 0 if np.isnan(kendall) else kendall,
# non-linear kernel:
# polynomial
features += pairwise.polynomial_kernel(x1, x2, degree=2)[0][0],
# rbf
features += pairwise.rbf_kernel(x1, x2)[0][0],
# laplacian
features += pairwise.laplacian_kernel(x1, x2)[0][0],
# sigmoid
features += pairwise.sigmoid_kernel(x1, x2)[0][0],
return features
def Recommendation_System(df,player_id,k):
query = str(Playerdata.objects.all().query)
df1 = pd.read_sql_query(query, connection)
ID2namesmapper=df1.set_index('sofifa_id')['short_name']
sc=StandardScaler()
df_sc=sc.fit_transform(df)
kn=sigmoid_kernel(df_sc,df_sc)
so_fifa_id=list(df.index)
kn_df=pd.DataFrame(kn,index=so_fifa_id,columns=so_fifa_id)
try:
temp_dict=kn_df[player_id].to_dict()
temp_list=list({k: v for k, v in sorted(temp_dict.items(), key=lambda item: item[1], reverse=True)}.keys())
temp_list.remove(player_id)
return ID2namesmapper[temp_list[0:k]].to_list()
except:
print('PlayerID not present in the database')
def drawAlgoCompGraph():
h = 0.02
names = ["ridge", "KNN", "Linear SVM", "RBF SVM", "LDA",
"Random Forest", "AdaBoost", "Naive Bayes", "QDA", "Logistic"]
kernel_names =['laplacian kernel', 'RBF kernel', 'Sigmoid kernel']
classifiers = [
linear_model.Ridge(),
KNeighborsClassifier(9),
SVC(kernel="linear", C=0.025),
SVC(kernel="rbf", gamma=0.25),
LDA(),
RandomForestClassifier(max_depth=5, n_estimators=10, max_features=1),
AdaBoostClassifier(),
GaussianNB(),
QDA(),
linear_model.LogisticRegression()]
filename = '/Users/guichengwu/Desktop/208_mid term/exam.dat'
data = np.loadtxt(filename, dtype='str')
for i in range(data.shape[0]):
for j in range(1,data.shape[1]):
data[i][j] = data[i][j][2:]
data_matrix = np.matrix(data).astype(np.float)
X = data_matrix[:, 1:5]
y = np.asarray(data_matrix[:, 0])
X = preprocessing.scale(X)
Lap_X = laplacian_kernel(X)
pca1 = decomposition.PCA(n_components=2)
pca1.fit(Lap_X)
Lap_X = pca1.transform(Lap_X)
RBF_X = rbf_kernel(X)
pca2 = decomposition.PCA(n_components=2)
pca2.fit(RBF_X)
RBF_X = pca2.transform(RBF_X)
Sig_X = sigmoid_kernel(X)
pca3 = decomposition.PCA(n_components=2)
pca3.fit(Sig_X)
Sig_X = pca3.transform(Sig_X)
linearly_separable1 = (Lap_X, y)
linearly_separable2 = (RBF_X, y)
linearly_separable3 = (Sig_X, y)
datasets = [
linearly_separable1,
linearly_separable2,
linearly_separable3,
]
figure = plt.figure(figsize=(30, 10))
i = 1
for kernel_name, ds in zip(kernel_names, datasets):
X, y = ds
X = StandardScaler().fit_transform(X)
X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=.4)
x_min, x_max = X[:, 0].min() - 0.5, X[:, 0].max()+0.5
y_min, y_max = X[:, 1].min() - 0.5, X[:, 1].max()+0.5
xx, yy = np.meshgrid(np.arange(x_min, x_max, h),
np.arange(y_min, y_max, h))
cm = plt.cm.RdBu
cm_bright = ListedColormap(['#FF0000', '#0000FF'])
ax = plt.subplot(len(datasets), len(classifiers)+1, i)
ax.scatter(X_train[:, 0], X_train[:, 1], c=y_train, cmap=cm_bright)
ax.scatter(X_test[:, 0], X_test[:,1], c=y_test, cmap=cm_bright, alpha=0.6)
ax.set_xlim(xx.min(), xx.max())
ax.set_ylim(yy.min(), yy.max())
ax.set_xticks(())
ax.set_yticks(())
ax.set_title(kernel_name)
i += 1
# iterate over classifiers
for name, clf in zip(names, classifiers):
ax = plt.subplot(len(datasets), len(classifiers) + 1, i)
clf.fit(X_train, y_train)
score = clf.score(X_test, y_test)
if hasattr(clf, "decision_function"):
Z = clf.decision_function(np.c_[xx.ravel(), yy.ravel()])
else:
Z = clf.predict_proba(np.c_[xx.ravel(), yy.ravel()])[:, 1]
Z = Z.reshape(xx.shape)
ax.contourf(xx, yy, Z, cmap=cm, alpha=0.8)
ax.scatter(X_train[:, 0], X_train[:,1], c=y_train, cmap=cm_bright)
ax.scatter(X_test[:, 0], X_test[:, 1], c=y_test, cmap=cm_bright, alpha=0.6)
ax.set_xlim(xx.min(), xx.max())
ax.set_ylim(yy.min(), yy.max())
ax.set_xticks(())
ax.set_yticks(())
ax.set_title(name)
ax.text(xx.max() - 0.3, yy.min() + 0.3, ('%.2f' % score).lstrip('0'),
size=15, horizontalalignment='right')
i += 1
figure.subplots_adjust(left=0.02, right=0.98)
plt.show()
figure.savefig('/Users/guichengwu/Desktop/algorithm_comparison2.png')