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© 2012 Texas Instruments Educaon Technology Page 43
A hand-made funcon table
Capturing data by hand
Instead of typing ‘area’ you can also press
h, highlight area and then press ·.
A powerful feature of TI-Nspire is its ability to capture data from a or page. Follow
through these steps to see an example of how this works, using the measurement of the area of a triangle
from Tutorial 5.
• Create a new page: (c then select ).
• Choose the Manual Data Capture opon from the menus
(b322).
You should see in the entry line: =capture(var,0).
• Overtype var by typing the variable name area.
• Resize the column (b121).
• Move to cell A1 and capture the current value of area by pressing /^.
• Move to the page where you constructed the triangle. If necessary unpin point B and unlock the area
variable, then grab B and move it. Noce that this changes the area.
• Return to page 1.6 and in cell A2 press /^.
In the formula the second parameter, 0, indicates manual
capture was selected. An interesng variaon involves using
automac capture (i.e. =capture(area,1)). Either edit the
formula in column A or enter it in column B (b321).
Then grab and move point B around again and see the huge
amount of data that are generated. (See the Appendix for
more ideas about using this feature).
If you have me you may care to measure the base and height
of the triangle on the Geometry page and capture these
values on the Spreadsheet page. How could such features be
used to develop an understanding of triangle area?
Capturing data by hand
It is quite possible to create from scratch a table of values for
funcons that have been dened elsewhere in the current
document. For example, the screen shown here uses the
denions of f1 and f2 that were used previously. Don’t
worry if the values you see are dierent from these.