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-- ViSta's Data Analysis Language -- lets you define
script files so that you can run analyses automatically
without requiring user interaction.
also lets you type at the keyboard rather than use the
point-and-click graphical interface.
consists of functions which correspond directly
to menu items. Every menu item is paralleled by
an identically-named function (except spaces are
replaced by dashes).
example, (show-variables) is the ViDal function
that corresponds to the Show Variables menu
item and GuideMap button.
can be used by typing at the keyboard, or
it can be used as a script loaded from a
is a simple ViDAL example:
These ViDAL functions load the
"animal" data, visualize them, then do an analysis of
variance, followed by a report and visualization of
the resulting anova model.
Users may only need ViDal, as they may be most satisfied
with typing commands.
may not wish to use a visual interface all the time
(or ever). ViDal permits this.
direct and simple correspondence of menu items,
GuideMap buttons and ViDAL functions is meant to
gradually teach users the underlying ViDAL language,
gradually increasing the sophistication of the data
permits scripts so that repetitive or long analyses
may proceed without the necessity of have a user
scripts permit learning-by-example tutorial sessions.
Examples are provided with the system.