# Changing 'character' columns to factor/numeric sales_dataset$Platform=as.factor(sales_dataset$Platform) sales_dataset$Year_of_Release=as.numeric(sales_dataset$Year_of_Release) sales_dataset$Genre=as.factor(sales_dataset$Genre) sales_dataset$Publisher=as.factor(sales_dataset$Publisher) sales_dataset$Developer=as.factor(sales_dataset$Developer) sales_dataset$Rating=as.factor(sales_dataset$Rating)
时间: 2023-12-05 13:03:12 浏览: 31
这段代码是用来将数据集中的字符型列转换为因子型或数值型列的。其中,as.factor()函数将列转换为因子型,as.numeric()函数将列转换为数值型。在这段代码中,将数据集sales_dataset中的Platform、Year_of_Release、Genre、Publisher、Developer和Rating列分别转换为因子型或数值型列。这样转换的目的是为了便于后续的数据分析和建模。
相关问题
import pandas as pd import math as mt import numpy as np from sklearn.model_selection import train_test_split from Recommenders import SVDRecommender triplet_dataset_sub_song_merged = triplet_dataset_sub_song_mergedpd triplet_dataset_sub_song_merged_sum_df = triplet_dataset_sub_song_merged[['user','listen_count']].groupby('user').sum().reset_index() triplet_dataset_sub_song_merged_sum_df.rename(columns={'listen_count':'total_listen_count'},inplace=True) triplet_dataset_sub_song_merged = pd.merge(triplet_dataset_sub_song_merged,triplet_dataset_sub_song_merged_sum_df) triplet_dataset_sub_song_merged['fractional_play_count'] = triplet_dataset_sub_song_merged['listen_count']/triplet_dataset_sub_song_merged small_set = triplet_dataset_sub_song_merged user_codes = small_set.user.drop_duplicates().reset_index() song_codes = small_set.song.drop_duplicates().reset_index() user_codes.rename(columns={'index':'user_index'}, inplace=True) song_codes.rename(columns={'index':'song_index'}, inplace=True) song_codes['so_index_value'] = list(song_codes.index) user_codes['us_index_value'] = list(user_codes.index) small_set = pd.merge(small_set,song_codes,how='left') small_set = pd.merge(small_set,user_codes,how='left') mat_candidate = small_set[['us_index_value','so_index_value','fractional_play_count']] data_array = mat_candidate.fractional_play_count.values row_array = mat_candidate.us_index_value.values col_array = mat_candidate.so_index_value.values data_sparse = coo_matrix((data_array, (row_array, col_array)),dtype=float) K=50 urm = data_sparse MAX_PID = urm.shape[1] MAX_UID = urm.shape[0] recommender = SVDRecommender(K) U, S, Vt = recommender.fit(urm) Compute recommendations for test users uTest = [1,6,7,8,23] uTest_recommended_items = recommender.recommend(uTest, urm, 10) Output recommended songs in a dataframe recommendations = pd.DataFrame(columns=['user','song', 'score','rank']) for user in uTest: rank = 1 for song_index in uTest_recommended_items[user, 0:10]: song = small_set.loc[small_set['so_index_value'] == song_index].iloc[0] # Get song details recommendations = recommendations.append({'user': user, 'song': song['title'], 'score': song['fractional_play_count'], 'rank': rank}, ignore_index=True) rank += 1 display(recommendations)这段代码报错了,为什么?给出修改后的 代码
代码中的错误是使用了未定义的模块和类。需要先安装相应的模块并导入相应的类。
以下是修改后的代码:
```python
import pandas as pd
import numpy as np
from scipy.sparse import coo_matrix
from sklearn.model_selection import train_test_split
from Recommenders.SVDRecommender import SVDRecommender # 导入SVDRecommender类
triplet_dataset_sub_song_merged = pd.read_csv('triplet_dataset_sub_song_merged.csv') # 读取数据
triplet_dataset_sub_song_merged_sum_df = triplet_dataset_sub_song_merged[['user','listen_count']].groupby('user').sum().reset_index()
triplet_dataset_sub_song_merged_sum_df.rename(columns={'listen_count':'total_listen_count'},inplace=True)
triplet_dataset_sub_song_merged = pd.merge(triplet_dataset_sub_song_merged,triplet_dataset_sub_song_merged_sum_df)
triplet_dataset_sub_song_merged['fractional_play_count'] = triplet_dataset_sub_song_merged['listen_count']/triplet_dataset_sub_song_merged['total_listen_count']
small_set = triplet_dataset_sub_song_merged[['user','song','fractional_play_count']]
user_codes = small_set.user.drop_duplicates().reset_index()
song_codes = small_set.song.drop_duplicates().reset_index()
user_codes.rename(columns={'index':'user_index'}, inplace=True)
song_codes.rename(columns={'index':'song_index'}, inplace=True)
song_codes['so_index_value'] = list(song_codes.index)
user_codes['us_index_value'] = list(user_codes.index)
small_set = pd.merge(small_set,song_codes,how='left')
small_set = pd.merge(small_set,user_codes,how='left')
mat_candidate = small_set[['us_index_value','so_index_value','fractional_play_count']]
data_array = mat_candidate.fractional_play_count.values
row_array = mat_candidate.us_index_value.values
col_array = mat_candidate.so_index_value.values
data_sparse = coo_matrix((data_array, (row_array, col_array)),dtype=float)
K=50
urm = data_sparse
MAX_PID = urm.shape[1]
MAX_UID = urm.shape[0]
recommender = SVDRecommender(K) # 创建SVD推荐器
U, S, Vt = recommender.fit(urm) # 训练推荐器
uTest = [1,6,7,8,23]
uTest_recommended_items = recommender.recommend(uTest, urm, 10)
# 输出推荐结果
recommendations = pd.DataFrame(columns=['user','song', 'score','rank'])
for user in uTest:
rank = 1
for song_index in uTest_recommended_items[user, 0:10]:
song = small_set.loc[small_set['so_index_value'] == song_index].iloc[0]
recommendations = recommendations.append({'user': user, 'song': song['song'], 'score': song['fractional_play_count'], 'rank': rank}, ignore_index=True)
rank += 1
display(recommendations)
```
import pandas as pd from mlxtend.preprocessing import TransactionEncoder from mlxtend.frequent_patterns import apriori # 读取 Excel 文件数据 df = pd.read_excel('D:/shujuji/zhizaoye.xls', sheet_name='制造业') dataset = df.values.tolist() print(dataset) te = TransactionEncoder() te_data = te.fit(dataset).transform(dataset) df_encoded = pd.DataFrame(te_data, columns=te.columns_) # 应用 Apriori 算法检测频繁项集 frequent_itemsets = apriori(df_encoded, min_support=0.2, use_colnames=True) # 输出结果 print(frequent_itemsets)找出这段代码的错误并更正
这段代码的错误是缺少空格和换行符,正确的代码如下:
```
import pandas as pd
from mlxtend.preprocessing import TransactionEncoder
from mlxtend.frequent_patterns import apriori
# 读取 Excel 文件数据
df = pd.read_excel('D:/shujuji/zhizaoye.xls', sheet_name='制造业')
dataset = df.values.tolist()
print(dataset)
te = TransactionEncoder()
te_data = te.fit(dataset).transform(dataset)
df_encoded = pd.DataFrame(te_data, columns=te.columns_)
# 应用 Apriori 算法检测频繁项集
frequent_itemsets = apriori(df_encoded, min_support=0.2, use_colnames=True)
# 输出结果
print(frequent_itemsets)
```
相关推荐
![rar](https://img-home.csdnimg.cn/images/20210720083606.png)
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)
![7z](https://img-home.csdnimg.cn/images/20210720083312.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)