Description Usage Arguments Value
Extract useful data frome database, and organize them to a needed format
1 2 | preprocess(district, host, port, user, password, dbname, startmon, endmon,
enctype)
|
district |
City name, character |
host |
Host of the server, character |
port |
Port of the server, numeric |
user |
User of the server, character |
password |
Password of the server, character |
dbname |
Database name of city, character |
startmon |
The firt month in the form such as "200606", character |
endmon |
The last month in the form as param startmon, character |
enctype |
The encoding type, gbk or utf8 or else ? character |
A list:
(1) preproccessed data, data frame
(2) the first month conform to some regularity, character
(3) the last month conform to some regularity, character
Note: here, the total number of sample/month should be greater than 10.
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