why weka tampers data

[ouyeyu]

Hi There,

I ran into a problem when I use wek-3-7-5 to read a column from a mysql table.

select sl_yn_nm from backtest_20120112_g1_11 limit 0,10;
The type of "sl_yn_nm" is varchar(1) default NULL. It has two kinds of values: 0 or 1.
The results should be like green below (the left column), unfortunately, SOMETIMES what weka reads is like yellow (the right column).
0 1
1 0
0 1
0 1
0 1
1 0
0 1
1 0
0 1
0 1


Do you know why this happened?
Thanks in advance.

[Mark]

This has been answered over on the Weka mailing list:

https://list.scms.waikato.ac.nz/mail...ne/055595.html

Cheers,
Mark.