Also, I try to use named_parameter to select the parameter I want to initialize:

屏幕快照 2019-05-01 下午3.50.18.png862×154 15.3 KB

But it didn’t work, the value of parameter is not changed.
But when I use:   v.data=regression_fc.data   It works.
Why? What’s the difference between v=regression_fc and v.data=regression_fc.data ?
I alsways assign value to Variable by simply using variable=xxx , when should I need to add .data?