Reference Guide

D-10 Reserved Variables
TPAR
TPAR is a variable in the current directory. It contains a list of parameters used by the table of values plotting
operation.
Parameter
(Command)
Description Default Value
starting-value Real number that specifies the first value to show in the
table.
0
step Real number that specifies the amount to increment
from starting-value for each row in the table.
.1
table-format 0 for “Automatic”, for generating the table based on
automatically-created values, or 1 for “Build Your
Own”, for generating the table based on values stored in
a vector stored in filename and saving any user-entered
values.
0
zoom-factor Real number that specifies the zoom factor for the table. 4
font-size 0 for the small font or 1 for the large font. 0
filename The name of a variable containing a vector with values
to use for input into the table.
TAB
VPAR
VPAR is a variable in the current directory. It contains a list of parameters used by the 3D plot types. The main data
structure stored in VPAR describes the “view volume,” the abstract three-dimensional region in which the function
is plotted.
Parameter
(Command)
Description Default Value
(x
left
, x
right
) (XVOL) Real numbers that specify the width of the view volume.
( – 1, 1)
(y
far
, y
near
) (YVOL) Real numbers that specify the depth of the view volume.
( – 1, 1)
(z
low
, z
high
) (ZVOL) Real numbers that specify the height of the view volume. (–1, 1)
(x
eye
, y
eye
, z
eye
) (EYEPT) Real numbers that specify the point in space from which
the plot is viewed.
(0, – 3, 0)
(x
step
, y
step
)
(NUMX, NUMY)
Real numbers that specify the increments between of x-
coordinates and y-coordinates plotted. The increments
are equal to the range for the axes divided by the number
of steps. Used instead of (or in combination with) res.
(10, 8)
(xx
left
, xx
right
) (XXRNG) Real numbers that specify the width of the input plane
(domain). Used by GRIDMAP and PARSURFACE.
( – 1, 1)
(yy
far
, yy
near
) (YYRNG) Real numbers that specify the depth of the input plane
(domain). Used by GRIDMAP and PARSURFACE.
( – 1, 1)
Parameters without commands can be modified programmatically by storing new values in the list contained in
VPAR (use the PUT command).