If you looked at
CFActive.html, the CurveFit control you just
viewed is a sample of the ActiveX technology
we'll be using for some of our smaller demos. It
will be integrated into an EconoMath tutorial on
time-series analysis, the way economists try to
find trends and predict (with varying degrees of
success) how things will be in the future. This
is one of the simplest methods of finding trends,
called linear regression.
Note: you may have received a message telling you
the control is unsigned and could potentially be
unsafe. At this point we have not yet obtained an
Authenticode security certificate, but the
control does implement the standard COM safety
interfaces. The control should not in any way
damage your computer.
Why use ActiveX over Java? With a Java applet,
you must wait for it to load every time you run
it, whereas an ActiveX control downloads once and
resides on your computer. Also, ActiveX is a core
technology in the Windows operating system, and
is quickly spreading to other systems now that
Microsoft has turned the standard over to an
international standards organization.
Why use Java over ActiveX?
Although Java is at times less reliable, it is
extremely portable and is installed on a large
group of machines. Many users may have no access
to ActiveX or may not wish to go to the trouble
of installing it. Thus, we provide both Java and
Some of our future interactive features will
include a stock market simulation using actual
stock prices. You'll be able to tell us which
stocks you'd like, and we'll keep track of how
much (virtual) money you make, and show you how
you stack up against other users of our site.