[Gretl-users] Re: Updating variables

Am 23.12.20 um 12:00 schrieb Brian Revell: > Is there any way to update variables that are functions of another, if > the original variable Y has been amended or updated . The former is > straightforward to edit Y's values. But I am not clear that for > example, l-Y is automatically recalculated. And if l-Y has already > been used in a session, Gretl will not let it be deleted giving the > error message cannot be deleted variable in use.. > Suggestions around this issue welcomed Hi Brian, Nothing gets automatically re-computed -- which is good. If you want to re-compute anything, you should make use of a function which needs to be called each time you have new/ different input variables. See the following example. With rehard to your second point: Could you give an example please? <hansl> scalar X = 4 scalar Y = 3 scalar Z = X - Y print X Y Z # changes in Y do not affect previously assigned Z scalar Y = 2 print X Y Z # Make use of a function for 'updating' Z function scalar compute_z (scalar X, scalar Y) return X - Y end function scalar Y = 3 eval compute_z(X, Y) scalar Y = 2 eval compute_z(X, Y) </hansl> Artur _______________________________________________ Gretl-users mailing list -- gretl-users(a)gretlml.univpm.it To unsubscribe send an email to gretl-users-leave(a)gretlml.univpm.it Website: https://gretlml.univpm.it/postorius/lists/gretl-users.gretlml.univpm.it/