Parametric; Parity - HP 48gII Advanced User's Reference Manual

PARAMETRIC

Type: Command
Description: Parametric Plot Type Command: Sets the plot type to PARAMETRIC.
When the plot type is PARAMETRIC, the DRAW command plots the current equation as a
complex-valued function of one real variable. The current equation is specified in the reserved
variable EQ. The plotting parameters are specified in the reserved variable PPAR, which has the
following form:
For plot type PARAMETRIC, the elements of PPAR are used as follows:
• (x , y
min
of the display range). The default value is (–6.5,–3.1) for the hp48gII and (–6.5,–3.9) for the
hp49g+.
• (x , y
max
corner of the display range). The default value is (6.5,3.2) for the hp48gII and (6.5,4.0) for the
hp49g+.
• indep is a list containing a name that specifies the independent variable, and two numbers
specifying the minimum and maximum values for the independent variable (the plotting
range). Note that the default value is X. If X is not modified and included in a list with a
plotting range, the values in (x
generally leads to meaningless results.
• res is a real number specifying the interval, in user-unit coordinates, between values of the
independent variable. The default value is 0, which specifies an interval equal to 1/130 of the
difference between the maximum and minimum values in indep (the plotting range).
• axes is a list containing one or more of the following, in the order listed: a complex number
specifying the user-unit coordinates of the plot origin, a list specifying the tick-mark
annotation, and two strings specifying labels for the horizontal and vertical axes. The default
value is (0,0).
• ptype is a command name specifying the plot type. Executing the command PARAMETRIC
places the name PARAMETRIC in PPAR.
• depend is a name specifying a label for the vertical axis. The default value is Y.
The contents of EQ must be an expression or program; it cannot be an equation. It is evaluated
for each value of the independent variable. The results, which must be complex numbers, give
the coordinates of the points to be plotted. Lines are drawn between plotted points unless flag
-31 is set.
...µ
Access:
Flags: Simultaneous Plotting (-28), Curve Filling (-31)
Input/Output: None
See also: BAR, CONIC, DIFFEQ, FUNCTION, GRIDMAP, HISTOGRAM, PARSURFACE,
PCONTOUR, POLAR, SCATTER, SLOPEFIELD, TRUTH, WIREFRAME, YSLICE

PARITY

Type: Command
Description: Parity Command: Sets the parity value in the reserved variable IOPAR.
Legal values are shown below. A negative value means the hp49g+/hp48gII does not check
parity on bytes received during Kermit transfers or with SRECV. Parity is still used during data
transmission, however.
3-116 Full Command and Function Reference
{ (x , y
min min
) is a complex number specifying the lower left corner of PICT (the lower left corner
min
) is a complex number specifying the upper right corner of PICT (the upper right
max
min
PARAMETRIC
), (x , y ), indep, res, axes, ptype, depend }
max max
, y ) and (x , y ) are used as the plotting range, which
min max max