# HP F2226A - 48GII Graphic Calculator User Manual Page 723

Graphing calculator.

CENTR (g)
The command CENTR takes as argument an ordered pair (x,y) or a value x,
and adjusts the first two elements in the variable PPAR, i.e., (x
(x
, y
), so that the center of the plot is (x,y) or (x,0), respectively.
max
max
SCALE (h)
The SCALE command determines the plotting scale represented by the number
of user units per tick mark. The default scale is 1 user-unit per tick mark.
When the command SCALE is used, it takes as arguments two numbers, x
and y
, representing the new horizontal and vertical scales. The effect of
scale
the SCALE command is to adjust the parameters (x
PPAR to accommodate the desired scale. The center of the plot is preserved.
SCALEW (i)
Given a factor x
, the command SCALEW multiplies the horizontal scale by
factor
that factor. The W in SCALEW stands for 'width.' The execution of SCALEW
changes the values of x
min
SCALEH (j)
Given a factor y
, the command SCALEH multiplies the vertical scale by that
factor
factor. The H in SCALEH stands for 'height.' The execution of SCALEW
changes the values of y
min
Note: Changes introduced by using SCALE, SCALEW, or SCALEH, can be
used to zoom in or zoom out in a plot.
ATICK (l)
The command ATICK (Axes TICK mark) is used to set the tick-mark annotations
for the axes. The input value for the ATICK command can be one of the
following:
A real value x : sets both the x- and y-axis tick annotations to x units
A list of two real values { x y }: sets the tick annotations in the x- and y-
axes to x and y units, respectively.
A binary integer #n: sets both the x- and y-axis tick annotations to #n
pixels
and x
in PPAR.
max
and y
in PPAR.
max
, y
) and
min
min
scale
, y
) and (x
, y
) in
min
min
max
max
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