Re: `Different' Axes (centered X axis)

[hankin@xxxxxxxxxxxxxxxxxxx (Steve Hankin)]

On Nov 22,  2:10pm, Mark Verschell wrote:
> Subject: `Different' Axes
> Does anyone know of a way to produce "centered" axes? E.g.:
>
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===================================================================

Hi Mark,

This is most easily described by example.  The documentation on the "%XAXIS"
command is on page 10-3 of the PLOT+ Users Guide
($FER_DIR/doc/pplus_manual.{ps,txt})

example:

PLOT/I=1:100/set_up sin(i/6)				! your plot ...
whatever
ppl axset 0,0,1,1					! no top or bottom axes
ppl plot						! plot w/out X axis
ppl xlab						! turn off X label
ppl %xaxis ($PPL$XMIN1) ($PPL$XMAX1) 10  0 5 2 1 0	! an X axis through Y=0
	                              ^          ^
                                     note 1     note 2
ppl axset 1,1,1,1					! restore default axes



note 1: this tic interval could be determined automatically using the %RANGE
	command (described on the same page of the Users' Guide)
    e.g.
	ppl %range ($PPL$XMIN1) ($PPL$XMAX1) 5   ! request approx 5 tics
	ppl %xaxis ($PPL$RANGE_LOW) ($PPL$RANGE_HIGH) ($PPL$RANGE_INC) 0 5 2 1
0


note 2: this controls the tics: above, below, or through the X axis
	The numeric labels are drawn for above or below but not through


	hope this helps - steve


-- 

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Steve Hankin	|  7600 Sand Point Way NE  |  FAX (206) 526-6744
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