def event_apriori_data(event_id, support):
support = float(support)
data = db.events
lists = data.find({'eventId': event_id})
lists = list(lists)
if (len(lists) != 0):
df1 = pd.DataFrame(lists)
item = []
for i in range(0, len(df1.triggers[0])):
text = df1.triggers[0][i]['data']
text = text.split(',')
item.append(text)
te = TransactionEncoder()
te_arry = te.fit_transform(item)
df2 = pd.DataFrame(te_arry, columns=te.columns_)
frq_item = apriori(df2, min_support=support, use_colnames=True)
rule = association_rules(frq_item,
metric='confidence',
min_threshold=0.6)
return rule.to_json(orient='records')
else:
return "No Data"
def apply_(self):
df_ = self.frequent_patterns_prepare(min_threshold=1000)
te = TransactionEncoder() # 对数据集进行TransactionEncoder编码
df_tf = te.fit_transform(df_.values)
df = pd.DataFrame(df_tf, columns=te.columns_)
start = time()
# 寻找频繁项集
frequent_itemsets = fpgrowth(df, min_support=0.05, use_colnames=True)
logging.debug('寻找频繁项集算法时耗:%s\n' % (time() - start))
print('寻找频繁项集算法时耗:', time() - start)
print()
frequent_itemsets.sort_values(by='support',
ascending=False,
inplace=True)
logging.debug(f'freqSet:\n{frequent_itemsets}\n')
print(f'freqSet:\n{frequent_itemsets}')
print('\n\n', '**' * 30)
# 生成关联规则
association_rule = association_rules(frequent_itemsets,
metric='confidence',
min_threshold=0.7) # 指标为置信度
association_rule.sort_values(by='leverage',
ascending=False,
inplace=True) # 关联规则按leverage排序
logging.debug('关联规则：\n{}'.format(association_rule))
print('关联规则：\n{}'.format(association_rule))
def rule():
data = get_data()
te = TransactionEncoder()
te_ary = te.fit_transform(data)
df = pd.DataFrame(te_ary, columns=te.columns_)
frequent_itemsets = apriori(df, min_support=0.05, use_colnames=True)
rules = association_rules(frequent_itemsets,
metric='confidence',
min_threshold=0.2)
return frequent_itemsets, rules
def rule():
data = pd.read_csv('shopping_data.csv', header=None)
df_arr = data.apply(deal,axis=1).tolist()
te = TransactionEncoder() # ????
te_ary = te.fit_transform(df_arr) # ?????
df = pd.DataFrame(te_ary, columns=te.columns_)
frequent_itemsets = apriori(df, min_support=0.05, use_colnames=True)
association_rules = association_rules(frequent_itemsets, metric="confidence", min_threshold=0.2)
return frequent_itemsets, association_rule # ?????????????? DataFrame
def transaction_encoder(transaction):
"""
读入交易记录，转化为0-1编码交易记录
Parameters:
transaction (二维list): 交易记录
Returns:
encoded_transaction (DataFrame): 0-1编码的交易记录
"""
te = TransactionEncoder() # 定义模型
df_tf = te.fit_transform(transaction)
encoded_transaction = pd.DataFrame(df_tf, columns=te.columns_)
return encoded_transaction
def fp_growth_retail(TOP_PERCENTAGE, file_name, no_of_trx):
data = pd.read_csv('../Datasets/' + str(file_name) + '.csv', header=None)
print("\n --- FP Growth on File " + str(file_name) +
" : and Top Percentage: " + str(TOP_PERCENTAGE))
# converting into required format of TransactionEncoder()
trans = []
for i in range(0, no_of_trx):
trans.append([str(data.values[i, j]) for j in range(0, 20)])
Items = dict(collections.Counter([x for sublist in trans
for x in sublist]))
Items['nan'] = 0
print("Frequencies of Each Item:")
print(Items)
top_items = top_x_per_products(Items, TOP_PERCENTAGE)
print("Top Items:")
print(top_items)
plot_graph(top_items, 'fp_growth', TOP_PERCENTAGE)
Output = [b for b in trans if any(a in b for a in top_items.keys())]
# Using TransactionEncoder
trans = np.array(trans)
Output = np.array(Output)
# print(Output.shape)
t = TransactionEncoder()
data = t.fit_transform(Output)
data = pd.DataFrame(data, columns=t.columns_, dtype=int)
# print(data.shape)
# here we also find nan as one of the columns so lets drop that column
data.drop('nan', axis=1, inplace=True)
# print(data.shape)
# print(data.head())
# running the fpgrowth algorithm
res = fpgrowth(data, min_support=0.01, use_colnames=True)
print("Number of Frequent Item sets:" + str(len(res)))
res = association_rules(res, metric="confidence", min_threshold=0.5)
print("\n=============== ASOCIATION RULES ======================")
cols = [0, 1, 4, 5]
res = res[res.columns[cols]]
print(res)
def rule():
df = pd.read_csv("shopping_data.csv", header=None)
dataset = df.stack().groupby(level=0).apply(list).tolist()
te = TransactionEncoder() # 定义模型
te_ary = te.fit_transform(dataset) # 转换数据集
df = pd.DataFrame(te_ary, columns=te.columns_) # 将数组处理为 DataFrame
frequent_itemsets = apriori(df, min_support=0.05, use_colnames=True)
association_rules = rules(frequent_itemsets,
metric="confidence",
min_threshold=0.2) # 置信度阈值为 0.1
return frequent_itemsets, association_rules
def rule3():
from mlxtend.frequent_patterns import fpgrowth
from mlxtend.frequent_patterns import association_rules
from mlxtend.preprocessing import TransactionEncoder
now = time.time()
te = TransactionEncoder()
te_ary = te.fit_transform(transactions)
df = pd.DataFrame(te_ary, columns=te.columns_)
frequent_itemsets = fpgrowth(df, min_support=0.03, use_colnames=True)
rules = association_rules(frequent_itemsets,
metric="lift",
min_threshold=0.2)
print("频繁项集：", frequent_itemsets)
print("关联规则：", rules[(rules['lift'] >= 1) & (rules['confidence'] >= 0.2)])
print("用时：", time.time() - now)
def encode_orders_materials(orders):
orders_grouped = orders[['order_id', 'material']].groupby('order_id')
orders_materials = [
list(orders_group.material) for (_, orders_group) in orders_grouped
]
encoder = TransactionEncoder()
orders_materials = encoder.fit_transform(orders_materials, sparse=True)
orders_index = list(orders_grouped.groups.keys())
orders_columns = [str(column) for column in encoder.columns_]
return pandas.DataFrame.sparse.from_spmatrix(orders_materials,
index=orders_index,
columns=orders_columns)
def unitfiy_sample_dataset(self):
start = time.perf_counter()
print("开始进一步规约样本数据集")
shopping_df = pd.DataFrame(self.sampleList)
df_arr = shopping_df.stack().groupby(level=0).apply(list).tolist() # 方法一
# df_arr = shopping_df.apply(self.deal,axis=1).tolist() # 方法二
te = TransactionEncoder() # 定义模型
df_tf = te.fit_transform(df_arr)
# df_01 = df_tf.astype('int') # 将 True、False 转换为 0、1 # 官方给的其它方法
# df_name = te.inverse_transform(df_tf) # 将编码值再次转化为原来的商品名
self.sample_df = pd.DataFrame(df_tf, columns=te.columns_)
elapsed = (time.perf_counter() - start)
print("Time used:", elapsed)
print("样本数据集已进一步规约完毕")
def rule():
df = pd.read_csv('shopping_data.csv')
dataset = df.stack().groupby(level=0).apply(list).tolist()
te = TransactionEncoder()
te_ary = te.fit_transform(dataset)
data = pd.DataFrame(te_ary, columns=te.columns_)
frequent_itemsets = apriori(data, min_support=0.05, use_colnames=True)
association_rules = rules(
frequent_itemsets, metric="confidence", min_threshold=0.2)
return frequent_itemsets, association_rules
def ele(date_start, date_end, asset_id, support):
support = float(support)
date_start = parser.parse(date_start, dayfirst=True)
date_end = parser.parse(date_end, dayfirst=True)
data = db.reports
lists = data.find({
'date': {
'$gt': date_start,
'$lt': date_end
},
'assetId': asset_id
})
lists = list(lists)
if (len(lists) != 0):
df = pd.DataFrame(lists)
data_ele = []
for i in range(0, len(df.elements)):
data_ele.append(df.elements[i])
for i in range(0, len(data_ele)):
for j in range(0, len(data_ele[i])):
if data_ele[i][j] is None:
data_ele[i][j] = "other"
te = TransactionEncoder()
te_arry = te.fit_transform(data_ele)
df1 = pd.DataFrame(te_arry, columns=te.columns_)
frq_item = apriori(df1, min_support=support, use_colnames=True)
rule = association_rules(frq_item,
metric='confidence',
min_threshold=0.5)
return rule.to_json(orient='records')
else:
return "No Data"
def rule():
df_data=pd.read_csv('shopping_data.csv',header=None)
dataset=[]
for i in range(len(df_data)):
list_data=list(df_data.loc[i])
list_no_nan=[]
for j in range(len(list_data)):
if isinstance(list_data[j],float):
break
else:
list_no_nan.append(list_data[j])
dataset.append(list_no_nan)
te = TransactionEncoder()
te_ary = te.fit_transform(dataset)
df_te = pd.DataFrame(te_ary, columns=te.columns_)
frequent_itemsets = apriori(df_te, min_support=0.05, use_colnames=True)
association_rules_df=association_rules(frequent_itemsets, metric="confidence", min_threshold=0.2)
print(frequent_itemsets)
print(association_rules_df)
return frequent_itemsets,association_rules_df
def generate_rules(df):
df['cat_suicides_num'] = pd.cut(df['num_of_suicides'], bins=6)
df['cat_suicides/100k'] = pd.cut(df['suicides/100k'], bins=6)
df['cat_population'] = pd.cut(df['population'], bins=6)
df['cat_gdp_for_year'] = pd.cut(df['gdp_for_year'], bins=6)
df['cat_gdp_per_capita'] = pd.cut(df['gdp_per_capita'], bins=6)
df.drop([
'num_of_suicides', 'population', 'suicides/100k', 'gdp_for_year',
'gdp_per_capita'
],
axis=1,
inplace=True)
# for i in df['continent'].unique():
# df_continent = df.loc[df.continent == i]
# df_continent = df_continent.drop(['continent'], axis=1)
# print('start: ', datetime.now().time())
trans = []
for y in range(0, df.shape[0]):
trans.append([str(df.values[y, j]) for j in range(0, df.shape[1])])
# print('just transformed the dataset into array: ', datetime.now().time())
te = TransactionEncoder()
data = te.fit_transform(trans)
data = pd.DataFrame(data, columns=te.columns_)
print(data)
frequent_items = apriori(data, min_support=0.5, use_colnames=True)
print(frequent_items)
rules = association_rules(frequent_items,
metric="confidence",
min_threshold=0.5)
print(rules)
# print('finished mining: ', datetime.now().time())
rules.to_csv('generated_rules.csv')
def data_for_apriori(self):
# rating_data
rating_df = pd.read_pickle(self.rating_data_path)
# 4점 이상의 고평점 영화만 사용
over_4_rating = rating_df[rating_df['rating'] >= 4]
user_movie_basket = over_4_rating.groupby('user_id')['movie_id'].apply(
set)
# basket -> vector
transaction = TransactionEncoder()
basket_array = transaction.fit_transform(user_movie_basket)
basket_df = pd.Dataframe(basket_array, columns=transaction.columns_)
# 평점 개수 기준 상위 5000개
top_5000_movie= rating_df.groupby('movie_id')['rating'].count().sort_values(ascending=False).\
iloc[:5000].index
top_5000_basket = basket_df[top_5000_movie]
top_5000_basket = top_5000_basket[top_5000_basket.sum(axis=1) > 0]
return top_5000_basket
def data_transform():
# 导入数据并进行条件过滤
df = pd.read_excel('./销售基础表查询.xlsx', sheet_name='销售基础表查询', header=0)
print('原始数据: {}'.format(df.shape))
bool_content = ((df['实销数量'] > 0) & (df['实销金额'] > 0))
df = df[bool_content]
print('数据过滤后: {}'.format(df.shape))
# 选择需要的数据字段
df2 = df[['单据号', '商品']]
print('提取字段后: {}'.format(df2.shape))
# 数据整合 —— 唯一单据号对应商品
df3 = pd.DataFrame([(i, df2[df2['单据号'] == i]['商品'].tolist()) for i in df2['单据号'].unique()])
print('数据整合后: {}'.format(df3.shape))
# 生成购物篮对应商品列表
df_arr = df3[1].tolist()
print('购物篮对应商品列表: {}'.format(len(df_arr)))
# 调用模型
te = TransactionEncoder()
df_tf = te.fit_transform(df_arr)
# 生成数据集
df4 = pd.DataFrame(df_tf, columns=te.columns_)
print('转换完成: {}'.format(df4.shape))
# 返回数据
return df4
def data_transform():
# 导入数据并进行条件过滤
df = pd.read_excel('./销售基础表查询.xlsx', sheet_name='销售基础表查询', header=0)
# print(df.head())
# print(df.shape)
bool_content = ((df['实销数量'] > 0) & (df['实销金额'] > 0))
df = df[bool_content]
# print(df.head())
print('df: {}'.format(df.shape))
# 选择需要的数据字段
df2 = df[['单据号', '商品']]
print('df2: {}'.format(df2.shape))
# 数据整合 —— 唯一单据号对应商品
df3 = pd.DataFrame([(i, df2[df2['单据号'] == i]['商品'].tolist()) for i in df2['单据号'].unique()])
print('df3: {}'.format(df3.shape))
# 生成购物篮对应商品列表
# shopping_lists = []
# for shopping_list in df3[1]:
# shopping_lists.append(shopping_list)
# shopping_df = pd.DataFrame(shopping_lists)
# print(shopping_df.head(20))
# 剔除数据中的空值（ apply ）
# df_arr = shopping_df.apply(deal, axis=1).tolist()
# print('df_arr: {}'.format(len(df_arr)))
# print(df_arr[:21])
df_arr = df3[1].tolist()
print('df_arr: {}'.format(len(df_arr)))
# 调用模型
te = TransactionEncoder()
df_tf = te.fit_transform(df_arr)
# 生成数据集
df4 = pd.DataFrame(df_tf, columns=te.columns_)
print('df4: {}'.format(df4.shape))
# print(df4.head(20))
# 返回数据
return df4
import matplotlib.pyplot as plt
all_data = pd.read_csv('dataset_group.csv', header=None)
print(all_data)
unique_id = all_data[1].unique()
print(unique_id.size)
items = all_data[2].unique()
print(items.size)
dataset = [[elem for elem in all_data[all_data[1] == id][2] if elem in items]
for id in unique_id]
te = TransactionEncoder()
te_ary = te.fit_transform(dataset)
df = pd.DataFrame(te_ary, columns=te.columns_)
print(df)
# 1
results = apriori(df, min_support=0.3, use_colnames=True)
results['length'] = results['itemsets'].apply(lambda x: len(x))
print(results)
results_orig = apriori(df, min_support=0.3, use_colnames=True, max_len=1)
results_orig['length'] = results_orig['itemsets'].apply(lambda x: len(x))
print(results_orig)
results = apriori(df, min_support=0.3, use_colnames=True)
results['length'] = results['itemsets'].apply(lambda x: len(x))
results_2 = results[results['length'] == 2]
def test_fit_transform():
oht = TransactionEncoder()
trans = oht.fit_transform(dataset)
np.testing.assert_array_equal(expect, trans)
"D:\\Machine Learning_Algoritms\\Apriori\\GroceryStoreDataSet.csv",
encoding='latin1',
names=['products'],
header=None)
num_records = len(Dataframe)
print(num_records)
transactions = []
for i in range(0, num_records):
transactions.append([str(Dataframe.values[i, j]) for j in range(0, 3)])
Dataframe = list(Dataframe["products"].apply(lambda x: x.split(',')))
from mlxtend.preprocessing import TransactionEncoder
te = TransactionEncoder()
te_data = te.fit_transform(Dataframe)
Dataframe = pd.DataFrame(te_data, columns=te.columns_)
count = Dataframe.loc[:, :].sum()
reverse_count = count.sort_values(0, ascending=False).head(11)
reverse_count = reverse_count.to_frame()
reverse_count = reverse_count.reset_index()
#reverse_count = reverse_count.rename(columns = {“index”: “items” ,0: “count”})
plt.style.available
plt.rcParams['figure.figsize'] = (10, 6)
plt.style.use('dark_background')
ax = reverse_count.plot.barh()
plt.title("Popular items")
import youtube_process
from mlxtend.preprocessing import TransactionEncoder
file_US = "USvideos.csv"
US_data = pd.read_csv(file_US, keep_default_na=False, low_memory=False)
US_data
df = US_data[['category_id','views']]
df
with open("US_category_id.json", 'r') as f:
content = json.load(f)
category_map = {}
for i in content['items']:
category_map[int(i['id'])] = i['snippet']['title']
category_map
t = df['category_id'].map(category_map)
df = pd.concat([df,t],axis=1)
df.columns=['category_id','views','category']
grade = []
for i in df['views'].values:
views_map = lambda x:{x>=4194399:'A',1823157<=x<4194399:'B',681861<=x<1823157:'C',
242329<=x<681861:'D',549<=x<242329:'E'}
grade.append(views_map(i)[True])
df['views_grade'] = grade
df = df.drop(['category_id', 'views'], axis = 1)
df
def deal(data):
return data.dropna().tolist()
df_arr = df.apply(deal,axis=1).tolist() # 转化成列表
TE = TransactionEncoder() # 定义模型
df_tf = TE.fit_transform(df_arr)
df = pd.DataFrame(df_tf,columns=TE.columns_)
df
['莴苣','豆奶','尿布','葡萄酒'],
['莴苣','豆奶','尿布','橙汁']]
shopping_df = pd.DataFrame(shopping_list)
def deal(data):
return data.dropna().tolist()
df_arr = shopping_df.apply(deal,axis=1).tolist()
"""由于mlxtend的模型只接受特定的数据格式。（TransactionEncoder类似于独热编码，每个值转换为一个唯一的bool值）"""
from mlxtend.preprocessing import TransactionEncoder # 传入模型的数据需要满足特定的格式，可以用这种方法来转换为bool值，也可以用函数转换为0、1
te = TransactionEncoder() # 定义模型
df_tf = te.fit_transform(df_arr)
# df_01 = df_tf.astype('int') # 将 True、False 转换为 0、1 # 官方给的其它方法
# df_name = te.inverse_transform(df_tf) # 将编码值再次转化为原来的商品名
df = pd.DataFrame(df_tf,columns=te.columns_)
"""求频繁项集：
导入apriori方法设置最小支持度min_support=0.05求频繁项集，还能选择出长度大于x的频繁项集。
"""
from mlxtend.frequent_patterns import apriori
frequent_itemsets = apriori(df,min_support=0.05,use_colnames=True) # use_colnames=True表示使用元素名字，默认的False使用列名代表元素
# frequent_itemsets = apriori(df,min_support=0.05)
frequent_itemsets.sort_values(by='support',ascending=False,inplace=True) # 频繁项集可以按支持度排序
print('求频繁项集')
print(frequent_itemsets[frequent_itemsets.itemsets.apply(lambda x: len(x)) >= 2]) # 选择长度 >=2 的频繁项集
from datetime import datetime
import json
global rules
data = pd.read_csv('groceryinfo.csv', header=None)
#print(data)
records = []
for i in range(0, 7501):
records.append([str(data.values[i, j]) for j in range(0, 20)])
removed_records = []
for row in records:
row = list(filter(lambda a: a != 'nan', row))
row = list(filter(lambda a: a != 'mineral water', row))
removed_records.append(row)
te = TransactionEncoder()
data = te.fit_transform(removed_records)
data = pd.DataFrame(data, columns=te.columns_)
from mlxtend.frequent_patterns import apriori, association_rules
frq_items = apriori(data, min_support=0.004, use_colnames=True)
rules = association_rules(frq_items, metric="confidence", min_threshold=0.2)
rules = rules.sort_values(['confidence', 'lift'], ascending=[False, False])
print(len(rules))
global products
products = {
"olive oil":
'https://images-na.ssl-images-amazon.com/images/I/71JLJ0MQT8L._SY679_.jpg',
"frozen vegetables":
'https://images-na.ssl-images-amazon.com/images/I/81Dxf-0CzwL._SL1500_.jpg',
# məhsulları ayrı ayrılıqda list formatına çevirmək
transactions = list(items["mehsul_ad"].transform(lambda x: x.split(";")))
# In[12]:
transactions[0]
# In[13]:
# məhsulları pivot formatında səbətə çevirmək: hər bir sətirdə(səbətdə) hansı məhsulların olub olmaması
from mlxtend.preprocessing import TransactionEncoder
tr_enc = TransactionEncoder()
basket = pd.DataFrame(tr_enc.fit_transform(transactions),
columns=tr_enc.columns_)
# In[14]:
basket
# In[15]:
# səbət analizi üçün lazım olan funksiyalar
from mlxtend.frequent_patterns import apriori, association_rules
# In[16]:
# məhsulların ayrı ayrılıqda və birlikdə səbətlərdə görünmə dərəcəsi
"""
import csv
dict = dkey
w = csv.writer(open("output.csv", "w"))
for key, val in dict.items():
w.writerow([key, val])
"""
# To create a list of lists from the dictionary values
i=10002
while i in range(10002,42580):
dkey[i]=list(map(str,dkey[i]))
we=list(dkey.values())
#Fitting the association rule learning model
from mlxtend.preprocessing import TransactionEncoder
te = TransactionEncoder()
dat=we[1:50]
te_ary = te.fit_transform(dat,sparse=False)
df = pd.DataFrame(te_ary, columns=te.columns_)
from mlxtend.frequent_patterns import apriori
frequent_itemsets = apriori(df, min_support=0.1, use_colnames=True)
print (frequent_itemsets)
from mlxtend.frequent_patterns import association_rules
t=association_rules(frequent_itemsets, metric="confidence", min_threshold=0.7)
from apyori import apriori
rules = apriori(symptoms, min_support=0.1, min_confidence=0.7)
results = list(rules)
for i in results:
for j in i.ordered_statistics:
X = j.items_base
Y = j.items_add
x = ', '.join([item for item in X])
y = ', '.join([item for item in Y])
if x != '':
print(x + ' → ' + y)
from mlxtend.preprocessing import TransactionEncoder
TE = TransactionEncoder()
data = TE.fit_transform(symptoms)
print(data)
import pandas as pd
df = pd.DataFrame(data, columns=TE.columns_)
df.head()
from mlxtend.frequent_patterns import apriori
items = apriori(df, min_support=0.1, use_colnames=True)
print(items)
print(items[items['itemsets'].apply(lambda x: len(x)) >= 2])
from mlxtend.frequent_patterns import association_rules
rules = association_rules(items, min_threshold=0.7)
def Mlx(itemsets, minimumSup):
te = TransactionEncoder() # 定義模型
df_tf = te.fit_transform(itemsets)
df = pd.DataFrame(df_tf, columns=te.columns_)
return apriori(df, min_support=minimumSup, use_colnames=True)
# %%
items = [
'whole milk', 'yogurt', 'soda', 'tropical fruit', 'shopping bags',
'sausage', 'whipped/sour cream', 'rolls/buns', 'other vegetables',
'root vegetables', 'pork', 'bottled water', 'pastry', 'citrus fruit',
'canned beer', 'bottled beer'
]
np_data_new = all_data.to_numpy()
np_data_new = [[
elem for elem in row[1:] if isinstance(elem, str) and elem in items
] for row in np_data_new]
# %%
te_new = TransactionEncoder()
te_ary_new = te_new.fit_transform(np_data_new)
data_new = pd.DataFrame(te_ary_new, columns=te_new.columns_)
data_new
# %%
fpg_result_new = fpgrowth(data_new, min_support=0.03,
use_colnames=True).sort_values('support',
ascending=False)
fpg_result_new
# %%
fpm_result_new = fpmax(data_new, min_support=0.03,
use_colnames=True).sort_values('support',
ascending=False)
fpm_result_new
import pandas as pd
from mlxtend.preprocessing import TransactionEncoder
from mlxtend.frequent_patterns import apriori, association_rules
import requests
file = open('/root/PycharmProjects/DATA_MINING/groceries.csv', 'w')
data = requests.get(
'https://raw.githubusercontent.com/stedy/Machine-Learning-with-R-datasets/master/groceries.csv'
)
file.write(data.text)
file.close()
file = open('/root/PycharmProjects/DATA_MINING/groceries.csv', 'r')
lines = file.readlines()
data = [[x if x[len(x) - 1] != '\n' else x[:len(x) - 1] for x in y.split(',')]
for y in lines]
print(data)
encoder = TransactionEncoder()
data = encoder.fit_transform(data)
print(data)
data = data.astype('int')
data = pd.DataFrame(data, columns=encoder.columns_)
print(data)
print(" Minimum support 5 % and confidence 9 % ")
frq_items = apriori(data, min_support=0.05, use_colnames=True)
rules = association_rules(frq_items, metric="confidence", min_threshold=0.09)
print(rules)
print(" Minimum support 7 % and confidence 10 % ")
frq_items = apriori(data, min_support=0.07, use_colnames=True)
rules = association_rules(frq_items, metric="confidence", min_threshold=0.10)
print(rules)
if freq[i] in txt:
res.append(freq[i])
if len(set(res)) == 0:
return (set(freq))
elif len(set(res)) < 15:
for j in range(len(freq)):
if len(set(res)) < 15:
res.append(freq[j])
else:
return set(res)
return set(res)
else:
return set(res)
df = pd.read_csv("dataset/sample.csv")['Tags']
df = df.apply(lambda x: x.split(" "))
data = df.values
td = TransactionEncoder()
td_data = td.fit_transform(df)
df2 = pd.DataFrame(td_data, columns=td.columns_)
freq_data = apriori(df2, min_support=0.009, use_colnames=True) #0.0004
freq_data['len'] = freq_data.itemsets.apply(lambda x: len(x))
def test():
df = pd.read_csv("sample.csv").head(1)
txt = df["Title"] + " " + df["Body"]
return get_ferq_with_txt(txt, ["linux", "c#", "php"])
'''
【白话机器学习】算法理论+实战之关联规则
https://mp.weixin.qq.com/s/KXoKE0cY7hiJIA2hE86mDw
'''
# 一、直接可用数据集
data = [('牛奶', '面包', '尿布'), ('可乐', '面包', '尿布', '啤酒'), ('牛奶', '尿布', '啤酒', '鸡蛋'),
('面包', '牛奶', '尿布', '啤酒'), ('面包', '牛奶', '尿布', '可乐')]
# 1.1、第三方库：
from mlxtend.frequent_patterns import apriori as mlxtend_apriori, association_rules as mlxtend_association_rules
from mlxtend.preprocessing import TransactionEncoder
# TransactionEncoder是进行数据转换中的，需要先将上面的data数据转成宽表的形式，何谓宽表，下面的这种：
"""数据转换"""
transEn = TransactionEncoder()
oht_ary = transEn.fit_transform(data)
new_data = pd.DataFrame(oht_ary, columns=transEn.columns_)
# In[]:
print(new_data.iloc[0][0])
print(type(new_data.iloc[0][0]))
# In[]:
# 第一步：计算频繁项集，在这里可以定义最小支持度进行筛选频繁项集：
"""计算频繁项集"""
frequent_itemset = mlxtend_apriori(new_data,
min_support=0.5,
use_colnames=True)
frequent_itemset
# In[]:
# 第二步：挖取关联规则， 这里的 准则 可以使用 置信度(confidence) 或 提升度（lift）
rules = mlxtend_association_rules(frequent_itemset,
metric='confidence',
