Popup Menu Items Relating to Linearised Equations

If you have clicked on a Linearised Equation, the statement-specific menu items in the popup menu are:

Decompose All or One Side of this Equation

Decompose Selected Expression (eq) [This will only be visible in the menu if you have selected two or more characters in the Equation.]

We describe these below.

Decompose All or One Side of this Equation

The general idea behind this is best illustrated by an example.

When you click on this menu choice to decompose part of the linearised equation, you first see a Type of Decomposition Form which asks you to make 3 choices. These are:

•the part of the equation to decompose, namely the LHS (left-hand side), the RHS (right-hand side) or the whole equation;

•the type of decomposition, namely Complete (that is, by variables) or Intelligent (which respects brackets and SUMs);

•whether the toggle should be first or last.

Once you have made these choices, the software calculates the decomposition and shows the results in the ViewHAR window.

If you choose to decompose the whole equation, the software first collects all terms onto the LHS and then decomposes the LHS. For example, the equation A+B = C-D+E will first be rewritten as A+B-C+D-E = 0.

Occasionally the Intelligent decomposition may not be quite what you want. In this case, it should be reasonably easy to modify the expressions in the memo on the AnalyseGE form and then re-evaluate them.

Decompose Selected Expression (eq)

Again you choose the type of decomposition (intelligent or complete) and whether the toggle should be first or last.

Only the selected expression (rather than the RHS or LHS or whole equation) is decomposed.

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

•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 last term in the decomposition shows the values of the expression you have selected. Examples will make this clear.

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

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