Undefined function or variable 'para'.

beta1(i)=para(i,1);

[DGM]

Yep. Looks undefined to me.

Did you have a question to ask, or any context to provide?

Answer 1

[Jon]

This error message means that you are trying to assign the variable beta1(i) to a variable para(i,1) that you have not defined yet. In other words the variable para must be on the left hand side of an equal sign before it is on the right hand side.