Examples - Decomposing a Selected Expression

You can select an expression in a linearised equation or on the RHS of a Formula and ask AnalyseGE to decompose that expression. You do this via the "Decompose Selected Expression" popup menu item which shows when you right-click on a linearised equation or a Formula. [You need to select (that is, highlight) the whole expression that you wish to decompose.]

When you decompose an expression selected in a linearised equation, you indicate whether you want the intelligent or the complete decomposition. Only the selected expression (rather than the RHS or LHS or whole equation) is decomposed.

•If you choose an intelligent decomposition, you see separate terms in the decomposition for the different parts which are added, subtracted, multiplied or divided. The decomposition respects brackets and SUMs. The last term in the decomposition shows the values of the expression you have selected. Examples will make this clear.

•If you choose the complete decomposition, you also see in the ViewHAR window the values of the whole expression you have selected. An example will make this clear.

When you decompose an expression selected from the RHS of a Formula, you always see an intelligent decomposition (you never see a complete decomposition). Specifically, you see separate terms in the decomposition for the different parts which are added, subtracted, multiplied or divided. The decomposition respects brackets and SUMs. The last term in the decomposition shows the values of the expression you have selected. Examples will make this clear.

Exactly What Are You Seeing?

As with all decompositions, if you are at all unsure exactly what values you are seeing in each toggle, you can look at the Exxx header on the ViewHAR form or in the Evaluate memo on the AnalyseGE form.

We are grateful to Steven Rose for suggesting that we develop automatic decompositions of selected expressions.

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

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