HP F2226A - 48GII Graphic Calculator User Manual page 761

Graphing calculator
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say they line feed character
, you will see at the left side of the bottom of
the screen the keystroke sequence to get such character ( . for this case) and
the numerical code corresponding to the character (10 in this case).
Characters that are not defined appear as a dark square in the characters list
( ) and show (
) at the bottom of the display, even though a numerical
None
code exists for all of them.
Numerical characters show the corresponding
number at the bottom of the display.
Letters show the code α (i.e., ~) followed by the corresponding letter, for
example, when you highlight M, you will see αM displayed at the lower left
side of the screen, indicating the use of ~m. On the other hand, m shows
the keystroke combination α M, or ~„m.
Greek characters, such as σ, will show the code α
, or ~‚s. Some
S
characters, like ρ, do not have a keystroke sequence associated with them.
Therefore, the only way to obtain such characters is through the character list
by highlighting the desired character and pressing @ECHO1@ or @ECHO@.
Use @ECHO1@ to copy one character to the stack and return immediately to
normal calculator display. Use @ECHO@ to copy a series of characters to the
stack. To return to normal calculator display use $.
See Appendix D for more details on the use of special characters. Also,
Appendix G shows shortcuts for producing special characters.
Page 23-4

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