Graphing Data

[Eugene529]

Is there a way to create x,y data graphs (Floating point numbers)?

[support]

There is a Graph Module in FlowStone that takes an array of floats and draws a graph. If you look at the FFT Module you will see how it is done.

eg.

Graph clip.png (92.82 KiB) Viewed 16147 times

[Eugene529]

These displays appear to output a graph of a floating point variable and time. Is there a way to graph two independent variables?

[Eugene529]

I would guess that the function I need to experiment with is the Point Array Lines. I this correct?

[support]

Yes correct but now we have Ruby there is a better way:

Ruby Graph clip.png (55.1 KiB) Viewed 16148 times

[aronb]

I need to graph the output of 2 oscillators (think lissajous)...

I could use the Point Array Lines but it auto scales the graph...

Please, how do you stop it from auto scaling?

I want the graph to be scaled at -1 to 1 on both axis regardless of what I input... as may signal (pattern) gets small I want to see it get small NOT have the graph automatically "gain up".

Very frustrating.

Aron

[Jay]

Do you want it to be scaled in size comparible to the volume/level of the signals?

like this?

XY_Scope-1.fsm

(32.04 KiB) Downloaded 888 times

[aronb]

Well I guess... this works to some extent.

The use of the envelope to calculate the area based on the x signal (or y or both) makes it work for some frequency. As the frequency is lowered the scope becomes jittery.

Thanks for the fix, it is quite ingenious!

I was hoping that a version existed that did not "autoscale" and did not need to be "tricked".

I included an offset to show the remaining issue...

We just need a good XY Display with color capability... like an old Vector Monitor - think old school arcade vector games. Or again the Point Array Lines module WITHOUT "autoscale"... I can't even think why you would want a module to falsely add gain to something you want to display in the first place.

Thanks for the help,

Aron