topic Plotting multiple short lines using only points and slopes in Discussions

Plotting multiple short lines using only points and slopes

Lavik17 — Sun, 11 Jun 2023 11:29:59 GMT

Hi everyone,

I was wondering if there is a way to use a dataset of X,Y and slope values to and plot these on a single graph? Ideally it should also do this by group.

e.g.:

Group. X. Y. Slope

A. 1. 1. 2

A. 2. 2. 3

B. 3. 3. 4

The graph will show each of these points, with a slope around it, and the line should be half the distance to the previous and next point in the dataset.

Thank you!!

Re: Plotting multiple short lines using only points and slopes

txnelson — Sat, 10 Dec 2022 02:22:56 GMT

A Graph Box() Display Object can handle this. A script will have to be written to draw the lines, but it wouldn't be a difficult piece of code.

Take a look at the Graph Box() documentation in the Scripting Guide.

Re: Plotting multiple short lines using only points and slopes

Byron_JMP — Mon, 12 Dec 2022 16:28:33 GMT

I did something like that where I wanted the g-force vector plotted for every location along a race track.

To get the lines, I added a customize script to the graph like this:

Pen Size( 1 );
For Each Row(
	Line(
		{:NGPSLongitude, :NGPSLatitude},
		{:NGPSLongitude + :gLong / 2000, :NGPSLatitude + :gLat / 2000}
	)
);

I've attached the data file below. The first script (bubble plot 3) has the figure above.

Re: Plotting multiple short lines using only points and slopes

Jed_Campbell — Mon, 12 Dec 2022 21:50:37 GMT

Except for me not understanding what you mean by the lines being " half the distance...", another way to do this would be to create 2 new formula columns to find one more X and Y point, then do some table stacking and splitting to create graphs for each group, basically just fitting a line to each of the (now) 2 data points. I've attached a workflow (for which you need JMP 17) to demonstrate this. If you need the script, let me know, and I'll send it along. Output below: