Re: remove all label except vector scale

[Mick Spillane <spillane@xxxxxxxxxxxxx>]

Hi Weiqwang,

The simplest way you can do this is to do the vector/nolab/set (which as
you know eliminates all labelling, including the scale arrow), then
reinstate the scale arrow with a placement and format of your
choosing using the "ppl veckey" command.  For example

	vector/i=1:10/j=1:8/nolab/set i+j,i-j
	ppl veckey/nouser 0,-0.5,,(f4.1) ; ppl vector
(put the scale arrow 0.5 inches below the plot origin; use f4.1 as
format; the 3rd parameter is not implemented by plotplus.)

There is also the "ppl vecset" command which allows you to choose the
size and scale of the vectors.  For example

	vector/i=1:10/j=1:8/nolab/set i+j,i-j
	ppl veckey/nouser 0,-0.5,,(f4.1,'' m/s'')
	ppl vecset 1,50 ; ppl vector
(draws a 1-inch scale arrow to represent 50 user units of vector length
and modifies the plotted vectors accordingly; the ppl veckey command
has been modified to add the units!)
Good luck,
Mick

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