The Tick Instructions, Xt"Andyt; The Tick Length Instruction, Tl - HP 7470A Interfacing And Programming Manual

The Tick Instructions, XT"andYT
DESCRIPHONCThe tick instruction, XT, draws a vertical X-tick at the
current location. The tick instruction, YT, draws a horizontal Y-tick at
the current pen location.
IE3 These instructions can be used to draw tick marks on axes,
draw grid lines by making the tick length 100%,or draw horizontal or
vertical lines either centered on or ending at the current pen position.
SYNTAX XT (terminator)
or
YT (terminator)
EXPLANATWNNeither instruction requires parameters; numeric
parameters are ignored. The terminator should be included to complete
the command.
The tick mark will be drawn at the current pen position whether the
pen is up or down.
The tick length is specified by the tick length instruction, TL. If no tick
length is specified, the length defaults to 0.5% of (P2X—Plx) for YT or
0.5% of (P2y —Ply) for XT for each (positive and negative) portion of
the tick. Refer to The Tick Length Instruction, TL, which follows.
The following example draws a horizontal line 3000 plotter units long,
places X—ticks at the endpoints and at X—locations1200 and 2200, and
raises and stores the pen.
"IN;SP2;PRZOO,SOO;PD;XT;PR1000,0;XT;"
"PR1000,0;XT;PR1000,0;XT;PU;SPO;"
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The Tick Length Instruction, TL
The tick length instruction, TL, specifies the length of
the tick marks drawn by the plotter. The tick lengths are specified as a
percentage of the horizontal and vertical distances between the scaling
points P1 and P2.
NEE The instruction can be used to set the length of both positive
and negative portions of tick marks. The instruction can be used with
only one parameter to suppress the negative portion of a tick mark, or
with a first parameter of zero to suppress the positive portion of the
tick. Setting the tick length, tp, to 100 enables the user to draw grids
easily, using XT and YT instructions.
4-2 ENHANCING THE PLOT