Data Collection and
Storage
In approximately half of the lessons in AI it is possible to
record measurements. In many of these the program provides tools
for saving, displaying and exporting collected data to a file.
When the “record settings” buttons at the bottom of an
interactivity screen
is clicked, the current settings of the parameters are stored in
a results buffer. The “store data in file” button will export
all collected data in the session to a text file for easy access
by other data analysis or plotting programs. The “clear results”
button clears the data buffer in preparation for a new session.
 In addition to these tools, AI also provides a plot of recorded
data, accessed by the “show plot” button. Clicking that button
brings up a plot of the results of the adjustments of signal
level at different bandwidths, like that shown here. The panel
on the left plots the signal level at threshold against the
noise bandwidth. The panel on the right displays a table
containing all of the parameters in effect for each click of the
“record settings” button. Having all of the data saved in a
table like this means that one can conduct an experiment using
any pair of parameters as the independent and dependent
variables.
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