Am 07.06.2013 17:51, schrieb Juan S. Sánchez Oliver:

Dear Gretl users,

I'm trying to introduce an interaction in the next script.

ols SPEC const Var1 Var2 COV1 COV2 COV3 COV4 COV5 COV6 COV7

I like to introduce the interaction between Var1 and Var2. What is the correct code?

Var1 is a two-levels factor and Var2 is a continuous predictor. SPEC is the response variable and COV1...7 are control covariates.

Thank you very much.

Try the new interaction operator '^'. You find infos on page 96 of the user-guide:

"In gretl you can do
list H = D ^ Z
where D is a list of discrete series (or a single discrete series), Z is a list (or a single series)1; all the
interactions will be created and listed together under the name H.
An example is provided in script 13.1"

Regards

(And I'm sorry, my English is bad)

Juan

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