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Hello everybody,

I am using E-view 7.0. My problem:

I have to define several equations, where variables for these equations depend on input from a "INPUT_MATRIX" and a "REFERENCE_MATRIX". The "INPUT_MATRIX" comprises of 1 and 0, indicating which variables from the "REFERENCE_MATRIX" shall be applied.

For example:
Matrix(1,4) INPUT_MATRIX.fill 1,1,0,1
Matrix(1,4) REFERENCE_MATRIX.fill C,AR(1),AR(2),X

combining INPUT_MATRIX and REFERENCE_MATRIX results into the independent variables of a equation which are:
1*C=C
1*AR(1)=AR(1)
0*AR(2)=-
1*X=X

I tried to define equations based on:
dependent_variable=C(1)*1+C(2)*1*AR(1)+C(3)*0*AR(2)+C(4)*1*X
in order to derive the equation
dependent_variable=C(1)+C(2)*AR(1)+C(4)*X
but it does not work.

Does anybody has an idea how to solve that problem in Eviews?

Thank you very much for your support.

Best regards,
Chris

Matrices cannot contain string data. Further, you cannot perform multiplication on strings (thus 1*AR(1)) will not work.

You could store the strings in a table object, rather than a matrix. Or, perhaps better, in a simple string variable.

You can choose whether to include a specific string with an if statement, rather than your multiplication.

Thus, it would look something like this:
or

Great, it works. Thank you very much