Partfrac; Path; Pcar; Pcoef - HP 48gII Advanced User's Reference Manual

See also: BAR, CONIC, DIFFEQ, FAST3D, FUNCTION, GRIDMAP, HISTOGRAM,
PARAMETRIC, PCONTOUR, POLAR, SCATTER, SLOPEFIELD, TRUTH, WIREFRAME,
YSLICE

PARTFRAC

CAS: Perform partial fraction decomposition on a partial fraction.

PATH

Type: Command
Description: Current Path Command: Returns a list specifying the path to the current directory.
The first directory is always HOME, and the last directory is always the current directory.
If a program needs to switch to a specific directory, it can do so by evaluating a directory list,
such as one created earlier by PATH.
!°
Access:
Input/Output:
See also: CRDIR, HOME, PGDIR, UPDIR

PCAR

CAS: Return the characteristic polynomial of a square matrix.

PCOEF

Type: Command
Description: Monic Polynomial Coefficients Command: Returns the coefficients of a monic polynomial (a
polynomial with a leading coefficient of 1) having specific roots.
The argument must be a real or complex array of length n containing the polynomial ' s roots. The
result is a real or complex vector of length n+1 containing the coefficients listed from highest
order to lowest, with a leading coefficient of 1.
!Þ
Access:
Input/Output:
See also: PEVAL, PROOT

PCONTOUR

Type: Command
Description: PCONTOUR Plot Type Command: Sets the plot type to PCONTOUR.
When plot type is set PCONTOUR, the DRAW command plots a contour-map view of a scalar
function of two variables. PCONTOUR requires values in the reserved variables EQ, VPAR,
and PPAR.
VPAR is made up of the following elements:
{ x
For plot type PCONTOUR, the elements of VPAR are used as follows:
• x and x
left
• y and y
near
• z and z
low
• x and x
min
• y and y
min
3-118 Full Command and Function Reference
MEMORY DIRECTORY PATH
Level 1/Argument 1
LL
POLYNOMIAL PCOEF
Level 1/Argument 1
[ array ]
roots
x y y z z
left right near far low high
are real numbers that specify the width of the view space.
right
are real numbers that specify the depth of the view space.
far
are real numbers that specify the height of the view space.
high
are not used.
max
are not used.
max
( °is the left-shift of the Nkey).
{ HOME directory-name
( Þis the left-shift of the 1key).
x x y y x y
min max min max eye eye
Level 1/Item 1
... directory-name
1
Level 1/Item 1
[ array ]
coefficients
z x y }
eye step step
}
n