IRIS Toolbox Reference Manual

## dot

Gross rate of growth pseudofunction

#### Syntax

    dot(EXPR)
    dot(EXPR,K)

#### Description

If the input argument `k` is not specified, this pseudofunction expands to

    ((expression)/(expression{-1}))

If the input argument `k` is specified, it expands to

    ((expression)/(expression{k}))

The two derived expressions, `expression{-1}` and `expression{k}`, are based on `expression`, and have all its time subscripts shifted by --1 or by `k` periods, respectively.

#### Example

The following two lines

    dot(Z)
    dot(X+Y,-2)

will expand to

    ((Z)/(Z{-1}))
    ((X+Y)/(X{-2}+Y{-2}))

IRIS Toolbox. Copyright © 2007—2013 Jaromir Benes.