Evaluating Expressions Within Formulas and Equations

The most interesting place to select expressions to evaluate is within Formulas and Equations. If you select an expression within either of these, you can Right Click to bring up the menu of possible actions. Unless your selection consists entirely of spaces, you will see the option Evaluate (selection or coeff/var at cursor). If you click to select this Evaluate option, the selected expression will be evaluated.

In most cases, you need to be careful to select an appropriate expression. Consider for example the following statement.

FORMULA (all,i,SECT)

DVCOM(i) = SUM(j,SECT, DVCOMIN(i,j)) + DVHOUS(i) + DVGOV(i);

If you select "DVHOUS(i)" the expression "(All,i,SECT) DVHOUS(i)" will be evaluated. If you select "DVHOUS(i) +" an error will occur since this is not a valid expression. Similarly an error will occur if you select "SUM(j,SECT, DVCOMIN(i,j)" since the closing bracket ")" of the SUM is missing. [At present, if you have selected something appropriate, and the error messages if not are rather terse and not very explicit.]

AnalyseGE tries to help you make a valid selection in various ways.

You can use the Toggles menu items in the popup menu to group several related expressions into one Results Coefficient.

URL of this topic: www.copsmodels.com/webhelp/analysege/hc_eval.htm

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