Rank: 273 based on 222 downloads (last 30 days) and 10 files submitted
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Alan Jennings

E-mail
Company/University
Air Force Institute of Technology
Lat/Long
39.73962, -84.179

Personal Profile:

I'm a controls student at University of Dayton pursuing a PhD by applying developmental learning so robots can incrementally learn high dimension tasks. I was a DAGSI fellow, but am currently an Ohio Space Grant Consortium fellow. I also work at the Air Force Institute of Technology using real-time pan-tilt-zoom cameras to find wing shapes in flight or space boom deployment characteristics.

Professional Interests:
Learning, controls, robotics

 

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Files Posted by Alan View all
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(last 30 days) 		Comments Rating
03 Apr 2013 Screenshot Create Video of Rotating 3D Plot Specify a set of view angles and this function creates a video for use in presentations. Author: Alan Jennings video, movie, mpg, 3d, visual, view 64 1
  • 4.0
4.0 | 1 rating
16 Jan 2013 Screenshot Optimal Inverse Function Creation Creates continuous, optimal inverse-functions: given a desired output, finds the optimal input Author: Alan Jennings inverse, optimization, multidimensional, constrained optimizat..., gradient descent 17 0
31 Jul 2012 Screenshot Unbounded Resolution for Function Approximation A continuous function is optimized for varying outputs and increasing parameterization dimension Author: Alan Jennings functional, optimization, interpolation, approximation, loess, localized regression 4 0
27 Jul 2012 Screenshot Inverse Optimal Functions for Motoman HP-3 Tip Precision A population based optimization increases pointing precision for a planar robotic arm. Author: Alan Jennings robotics, inverse, inverse kinematics, optimization, clustering 12 0
10 Jan 2012 Screenshot Furuta (rotary) Pendulum Equations of motion for a pendulum mounted on rotating base are compared to SimMechanics. Author: Alan Jennings pendulum, simulation, modeling, nonlinear, dynamics 7 1
  • 5.0
5.0 | 1 rating
Comments and Ratings by Alan View all
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  • 8
Updated File Comments Rating
25 Sep 2012 Intersection point of lines in 3D space Finding intersection point of lines in 3D space (two or more lines). Author: Anders Eikenes

Works great. Thanks for adding it up.

23 Jul 2012 3D Rotation about Shifted Axis Computes/applies rotation about arbitrary 3D line. Author: Matt J

Good work. I'd recomend adding the copyright restrictions to the source code to keep them together.

15 Feb 2012 Pareto Set find the pareto set from n points with k objectives Author: Yi Cao

Tried on 2011a 64bit and didn't get corret results (only two points). Seems that default dimensions changed the fix is adding the ',2' for the max direction.
Corrected: line 23 of pretoset.m
[x,checklist]=sort(max(X1./(Xmean(ones(m,1),:)+1),2));
19 Dec 2011 Recursive directory listing - Enhanced RDIR Files and directories listing, including recursive and other special features Author: Thomas Vanaret

Works great and saved me a lot of time.
A suggested improvement, instead of looking at the file size to identify directories, use the isdir flag.
Line 286: if D(ii).isdir %sz<0,
Change display to allow for 0b files
Line 291-293:
ss = max(0,min(4,floor(log2(sz)/10)));
disp(sprintf('%4.0f %1sb %20s %-64s ',...
sz/1024^(ss+eps),pp{ss+1}, datestr(D(ii).datenum, 0), D(ii).name));
19 Dec 2011 Recursive directory listing - Enhanced RDIR Files and directories listing, including recursive and other special features Author: Thomas Vanaret

Comments and Ratings on Alan's Files View all
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Updated File Comment by Comments Rating
30 Jun 2013 Sphere Fit (least squared) Fits a sphere to a set of noisy data. Does not require a wide arc or many points. Author: Alan Jennings Balata, Farsat

Dear Alan, could you please, explain more about the two vectors A and B. I don't understand the rationality of Error function you defined as sum((x-xc)^2+(y-yc)^2+(z-zc)^2-r^2)^2,. Is the initial sphere center is taken for partial of the error of each parameter for example xc= mean(x), yc=mean (y) and zc= mean (z) and the function E = sum((xi-mean(x))^2+(y-mean(y))^2+(z-mean(z))^2-r^2)^2 and then, minimze the function E. many thanks
30 Jun 2013 Sphere Fit (least squared) Fits a sphere to a set of noisy data. Does not require a wide arc or many points. Author: Alan Jennings Balata, Farsat

Dear Alan, pointing to my previous comment, I have just want to correct the equation
E = sum((xi-mean(x))^2+(yi-mean (y))^2+(zi-mean(z))^2-r^2)^2
Regards

06 May 2013 Sphere Fit (least squared) Fits a sphere to a set of noisy data. Does not require a wide arc or many points. Author: Alan Jennings Balata, Farsat

Hi Alan,
Great work I would be happy if you could send me the related paper describing the method.
isxfha@nottingham.ac.uk
04 Apr 2013 Create Video of Rotating 3D Plot Specify a set of view angles and this function creates a video for use in presentations. Author: Alan Jennings arnold

Thanks! A couple of bugs/ideas:

1. You should make it an option to fix the "zoom pumping", maybe it is the camera position, that rotation the plot under a larger elevation (say 45°) does not cause the plot to zoom in and out in every quadrant while rotating. Try this to see what I mean:

CaptureFigVid([0,45;-359,45], 'WellMadeVid',OptionZ)

Just as an example, this file solves this quite nicely
http://www.mathworks.com/matlabcentral/fileexchange/40572-spinrotate-your-plot

2. spacing the view angles makes sense, but I don't get why I can only specify two view angle pairs. In line 89 you limit this. Why not make it dependent on OptionZ.Periodic?

3. OptionZ.Periodic=true still causes a non-smooth jump when looping the video. Don't know why this is exactly

4. Add export for an animated gif instead of mp4. How to write one can be seen here:
http://www.mathworks.com/matlabcentral/fileexchange/21944-animated-gif
04 Apr 2013 Sphere Fit (least squared) Fits a sphere to a set of noisy data. Does not require a wide arc or many points. Author: Alan Jennings JamesAb

Hi Alan. Great code! I really appreciate if you could send me the related paper describing the method:

jamesabott@yahoo.com

Many thanks!
Top Tags Applied by Alan
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optimization, approximation, control design, inverse, multidimensional
Files Tagged by Alan View all
  • 1 - 5 of
  • 10
Updated   File Tags Downloads
(last 30 days) 		Comments Rating
03 Apr 2013 Screenshot Create Video of Rotating 3D Plot Specify a set of view angles and this function creates a video for use in presentations. Author: Alan Jennings video, movie, mpg, 3d, visual, view 64 1
  • 4.0
4.0 | 1 rating
16 Jan 2013 Screenshot Optimal Inverse Function Creation Creates continuous, optimal inverse-functions: given a desired output, finds the optimal input Author: Alan Jennings inverse, optimization, multidimensional, constrained optimizat..., gradient descent 17 0
31 Jul 2012 Screenshot Unbounded Resolution for Function Approximation A continuous function is optimized for varying outputs and increasing parameterization dimension Author: Alan Jennings functional, optimization, interpolation, approximation, loess, localized regression 4 0
27 Jul 2012 Screenshot Inverse Optimal Functions for Motoman HP-3 Tip Precision A population based optimization increases pointing precision for a planar robotic arm. Author: Alan Jennings robotics, inverse, inverse kinematics, optimization, clustering 12 0
10 Jan 2012 Screenshot Furuta (rotary) Pendulum Equations of motion for a pendulum mounted on rotating base are compared to SimMechanics. Author: Alan Jennings pendulum, simulation, modeling, nonlinear, dynamics 7 1
  • 5.0
5.0 | 1 rating

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