Campbell Scientific ID-2000W Software - Manual (Page 51)

5-1
SECTION 5. CALCULATED PARAMETERS
In addition to plotting any of the original data file
parameters, ID-2000 standard parameters, or
derivatives/integrals you can also create and
plot “calculated” parameters. A calculated
parameter is just as it sounds - a parameter that
is calculated based upon an equation and other
parameter values.
Calculated parameters are powerful analysis
tools. You can easily plot parameters such as
ratios, multiple parameter averages, normalized
parameters, etc. even though they were not
originally in the data file. You can even have
calculated parameters based upon other
calculated parameters.
Calculated parameters are created by an equation
which you enter. The resulting data from the
equation is appended to the data file. Therefore,
you can plot calculated parameters over and over
without having to recalculate all of its values each
time because the values actually become part of
the data file. You can add, delete, or edit
calculated parameters in any ID-2000 Windows
data file. There is a maximum parameter (original
plus calculated) limit of 512 for any data file.
Calculated parameter equations may contain
other parameters, other calculated parameters,
or standard mathematical functions. Besides
the standard mathematical operators you may
use functions such as ABS(), SIN(), COS(), etc.
in your equations. All equations are saved with
the data file which allows you to review or edit
the equations at a later time.
Once a calculated parameter is added to a data
file it is treated like an original parameter. The
only difference is that calculated parameters
may be deleted from the data file while the
original data can never be changed. All
calculated parameters are displayed in the
Parameter Selection List in square brackets “[ ]”
to distinguish them from the original
parameters.
To access the Calculated Parameters dialog either
select the Edit - Calc. Parameters menu item or
click the calculated parameter toolbar button.
The Calculated Parameters dialog (Figure 5-1)
allows you to create new parameters and edit or
delete existing parameters.
FIGURE 5-1. Calculated Parameters Dialog Box