HP Mob
ile C
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ing L
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7
The Statistics Aplet
The StreamSmart Aplet works seamlessly with the Statistics Aplet to provide you all
the tools you need to collect and analyze data. StreamSmart does the collection
of the data and selection of a final data set for analysis, then exports the data
directly to the Statistics Aplet, where additional graphing and analysis occurs. As
stated previously, the HP MCL can collect data from up to four sensors
simultaneously. In addition, each sample comes with a timestamp. The HP MCL
combines these readings into an ordered data-tuple:
(timestamp, channel 1 sensor, channel 2 sensor, channel 3 sensor, channel
4 sensor)
Of course, one or more of the four channels may not have a sensor attached. In
that case, the ordered data-tuple is shortened appropriately. Once you select the
data you want to analyze, the data is sent to columns in the Statistics Aplet. The
Statistics Aplet has ten columns available for data, C1 through C9, and C0. You
may choose a destination column for each value in the ordered data-tuple of your
experimental data, or use the default values provided. The result is that each data-
tuple becomes a row in a set of columns in the Statistics Aplet.
When you export data to the Statistics Aplet, you can choose to follow your data
into the Statistics Aplet for analysis or stay in the StreamSmart Aplet to continue
experimentation. In-depth analysis of the data, including the calculation of
summary statistics (for 1 or 2 variables) and modeling bi-variate data with various
fits, is performed in the Statistics Aplet. This manual contains a brief introduction
to the Statistics Aplet, but for more information about the Statistics Aplet, refer to
the
HP 39/40gs User’s Guide
.
Manual conventions
Throughout this manual, a few conventions have been employed to help you find
the functions under discussion. There are four notational conventions,
corresponding to primary key functions, shifted key functions, and functions in
menus:
1.
Functions on the keyboard appear in their own special font. For example,
the
ENTER
key appears as
`
. Shifted functions will be noted as such and
referenced both by the function name and the key combination required, as
in the function,
@ R
(Plot Setup).
2.
The HP 39/40gs calculators employ context-sensitive menus that appear
along the bottom of the display. The functions in these menus are accessed
via the top row of keys on the keyboard directly below the screen display.
There are six of these menu keys in all. For example, in the
Plot
screen
capture in Table 1-2, the four items shown in the menu are:
CHAN
,
PAN
,
SCOPE
, and
STOP
. Throughout this guide, these keys appear in a special
font when they represent a key press. For example, when the
ZOOM
function appears in a step as a key press, it is represented by
@ZOOM
.
