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• With the option In highlighted, press @@@OK@@@. The table is expanded
so that the x-increment is now 0.25 rather than 0.5. Simply, what
the calculator does is to multiply the original increment, 0.5, by the
zoom factor, 0.5, to produce the new increment of 0.25. Thus, the
zoom in option is useful when you want more resolution for the
values of x in your table.
• To increase the resolution by an additional factor of 0.5 press @ZOOM,
select
In once more, and press @@@OK@@@. The x-increment is now
0.0125.
• To recover the previous x-increment, press @ZOOM —@@@OK@@@ to select
the option
Un-zoom. The x-increment is increased to 0.25.
• To recover the original x-increment of 0.5 you can do an un-zoom
again, or use the option zoom out by pressing @ZOOM ˜@@@OK@@@.
•The option Decimal in @ZOOM produces x-increments of 0.10.
• The option Integer in @ZOOM produces x-increments of 1.
• The option Trig in produces increments related to fractions of
π
, thus
being useful when producing tables of trigonometric functions.
• To return to normal calculator display press `.
Fast 3D plots
Fast 3D plots are used to visualize three-dimensional surfaces represented
by equations of the form z = f(x,y). For example, if you want to visualize z
= f(x,y) = x
2
+y
2
, we can use the following:
•Press „ô, simultaneously if in RPN mode, to access to the PLOT
SETUP window.
• Change
TYPE to Fast3D. ( @CHOOS!, find Fast3D, @@OK@@).
•Press
˜ and type ‘X^2+Y^2’ @@@OK@@@.
• Make sure that ‘X’ is selected as the
Indep: and ‘Y’ as the Depnd:
variables.
•Press
L@@@OK@@@ to return to normal calculator display.
•Press
„ò, simultaneously if in RPN mode, to access the PLOT
WINDOW screen.
SG49A.book Page 5 Friday, September 16, 2005 1:31 PM