Vector fields in JMP 19

BHarris

I love the new Vector Fields capability in JMP Graph Builder!

 

That said, in one of the EA videos it showed how to stack the arrows, e.g. multiple connected line segments with an arrow off the last one, but the EA program has since closed, and now I can't seem to figure out how to make those show up.

 

E.g. suppose I have a robot tool position, velocity, and acceleration vectors, and I'd like to show position y vs. position x, but to draw a line from that using the velocity x and velocity y as deltas, then the acceleration as a little line segment off the end of that one, then draw an arrowhead at the end...

 

I think I've figured out that the velocity and acceleration terms all need to be dragged to the Interval drop zone, but I can only get one of the lines to show up.

 

Here's an example dataset:

 

time	px	py	vx	vy	ax	ay
0	20	30	3	5	0	0
2	28.1	45.2	5.1	10.2	2.1	5.2
4	40.6	71.4	7.4	16	0.2	0.6
6	57.5	105.4	9.5	18	1.9	1.4
8	73.7	144.1	6.7	20.7	-4.7	1.3
10	86.5	185.4	6.1	20.6	4.1	-1.4

 

If I drag px -> X, py -> Y, and the rest to Interval, then set the line ordering and connection settings, I get this:

 

 

The velocity vectors are drawn, but the accelerations aren't showing up, and nothing changes if I uncheck them from the variables list.  Did that feature get removed/modified?  It's weird that ax and ay don't show up in the Interval box or the legend, but if I right click it they are there and it gives me the option to remove them.

 

What am I missing?

hogi

I remember that this option is possible by dragging multiple columns onto the axes.
With the new option ,they will automatically be used in pairs:

 

To use this mode (instead of Interval) you can calculate the "3" points as transform columns:

Graph Builder(
	Transform Column( "py+vy+ay", Formula( :py + :vy + :ay ) ),
	Transform Column( "py+vy", Formula( :py + :vy ) ),
	Transform Column( "px+vx+ax", Formula( :px + :vx + :ax ) ),
	Transform Column( "px+vx", Formula( :px + :vx ) ),
	Size( 483, 459 ),
	Summary Statistic( "Median" ),
	Variables(
		X( :px ),
		X( :"px+vx"n, Position( 1 ) ),
		X( :"px+vx+ax"n, Position( 1 ) ),
		Y( :py ),
		Y( :"py+vy"n, Position( 1 ) ),
		Y( :"py+vy+ay"n, Position( 1 ) )
	),
	Elements(
		Line(
			X( 1 ),
			X( 2 ),
			X( 3 ),
			Y( 1 ),
			Y( 2 ),
			Y( 3 ),
			Legend( 5 ),
			Ordering( "Within Row" ),
			Connection( "Arrow" ),
			Summary Statistic( "Mean" )
		)
	)
);

don't know how to distinguish between the 3 segments if all 3 are parallel ...