Plugin Scripting with plotter

[Anthony Santago]

I'm attempting export moment vs task data directly from the plotter based on a motion file that I importing. However, when I plot (addMotionSource) in the python scripting I only get from 0 - 1sec of the entire motion (see figure 45). When I use the plot drop down menu to perform the same action I am able to get the full motion (see figure 46). I attempted to extend the axis of figure 45 to contain the full motion thinking that it may be an axis problem. However, when I did that it is obvious that its only plotting the first 1 sec (figure 47)

Figure45

Figure45.png (10 KiB) Viewed 1023 times

Figure46

Figure47

Figure47.png (9.89 KiB) Viewed 1023 times

I read through the plugin scripting examples and none of the examples give any indication that this could be a problem.

How do I get it to plot the full motion?

Code: Select all

for i in range (0,1): #len(subjects)):
	for t in range (0,1): #len(tasks)):
		
		plotterPanelShlElv = createPlotterPanel(subjects[i]+' '+tasks[t]+ ' Shoulder Elevation');
		motionfilePath = 'C:/Users/acsantag/Desktop/Strength_threshold_analysis/filtered young adult data/filtered_'+subjects[i]+'_'+tasks[t]+'_IK_results.mot';
		print(motionfilePath);

		motSrc = addMotionSource(plotterPanelShlElv,motionfilePath);
                crv0 = addMotionCurve(plotterPanelShlElv,'moment.shoulder_elv',muscle[0],motSrc);

[Anthony Santago]

I updated the "BothLegsWalk.mot" to include one extra time point at 1.02 seconds and changed the number of rows to 52 instead of 51. I then doubled checked my problem against the "plotMuscleMomentArmAgainstMotion.py" that comes with the OpenSim download, to ensure that I was coding things correctly, and it does not plot past 1 either.

When I play the motion using bar at the Top of the GUI it plays to 1.02secs so I know that OpenSim is reading in the everything from the motion file.

[Ayman Habib]

Hi Anthony,

There're methods

setMaxX(), setMinX()

that you can invoke to change the default domain bounds of the plot window.

Please let me know if that works for you.

Best regards,
-Ayman

[Anthony Santago]

Ayman,

Thank you for the information. The setMaxX functionality worked perfectly. Interestingly, as long as the value that is sent to setMaxX is greater than the maximum motion time, the plotter will default to the maximum time from the motion.

Thank you again for your help.
Anthony

[Anthony Santago]

Based on some testing with the python plotter scripting interface using the addMotionCurve I am able to access the following information:

Moment Arm: addMotionCurve(plotterPanel, 'momentArm.elv_Angle', muscle[0], motSrc);
Moment: addMotionCurve(plotterPanel, 'moment.elv_Angle', muscle[0], motSrc);
Muscle-Tendon Length: addMotionCurve(plotterPanel, 'Length', muscle[0], motSrc);

However I am unclear nor can find in the doxygen or scripting help how to access the following muscle related properties that I am capable of accessing through the plotter GUI interface.
active Fiber Force
passive Fiber Force
fiber length: neither 'fiber-length' or 'fiberLength' work
tendon length

Could you point me to a link or page on the confluence that describes the muscle properties that I can access via the python plotter scripting interface.

Thank you,
Anthony Santago

[Colton Sauer]

Anthony,

I had a similar problem. The fiber length of the muscle can be accessed using "FiberLength". I tried some of the other variables you were having issues with as well. It seems that if you capitalize the first letter of each word and remove all spaces from the GUI variable names, then you can access the data using addMotionCurve.

Colton

[Colton Sauer]

This is the link with the variables you can plot:
https://simtk.org/api_docs/opensim/gui_ ... otter.html