Rank: 265 based on 295 downloads (last 30 days) and 16 files submitted
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Matt J

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medical image processing, optimization algorithms

 

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13 Mar 2013 N-dimensional sparse arrays Creates an N-dimensional sparse array object, for arbitrary N. Author: Matt J sparse, ndimensional, multidimensional, oop, reshape, sparse array 47 72
  • 4.54545
4.5 | 11 ratings
06 Aug 2012 Representing Polyhedral Convex Hulls by Vertices or (In)Equalities Express bounded polyhedron via equalities/inequalities or vertices. Author: Matt J convex analysis, optimization, polytope, vertices, convex hull, convhull 21 36
  • 5.0
5.0 | 10 ratings
15 Feb 2012 Split nD-array into equal sized cells Splits an array of any dimension into cell array of equal sized chunks. Author: Matt J blockproc, tile, block, tiles, 8x8, dct 19 0
16 Oct 2011 Zero-Based Indexable Arrays (OOP Exercise) Creates arrays whose indexing starts from zero instead of one. Author: Matt J oop, zerobased, zero indexable, index from zero 4 0
05 Jul 2011 3D Rotation about Shifted Axis Computes/applies rotation about arbitrary 3D line. Author: Matt J rotation matrix, rotation, affine transform, affine, robotics, motion 52 15
  • 5.0
5.0 | 3 ratings
Comments and Ratings by Matt J View all
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01 May 2013 N-dimensional sparse arrays Creates an N-dimensional sparse array object, for arbitrary N. Author: Matt J

@Lauren,
Do you still have get that error? What version of MATLAB are you using? And what version of ndSparse?

You seem to be the only one with this problem, I'm afraid. It doesn't readily reproduce on my machine and I haven't received similar complaints.

30 Apr 2013 N-dimensional sparse arrays Creates an N-dimensional sparse array object, for arbitrary N. Author: Matt J

Lauren: not clear what you meant by your "comment below". As far as I can tell, you posted no prior comments.

25 Apr 2013 settings dialog Set or change arbitrary structure via a dialog Author: Rody Oldenhuis

19 Apr 2013 settings dialog Set or change arbitrary structure via a dialog Author: Rody Oldenhuis

Very nice, and quite useful, of course. The only design choice that I find a little unfortunate is that the formatting of the uicontrols (as pop-up menu, checkbox, etc...) is selected based on the data type of the initial field values. The consequence of this is that I can really only enter doubles and strings as field data.

Sometimes, however, I want the actual value of a field to be cell-valued, e.g., {'a','b','c'}. In your set-up, though, a cell array of strings always gets interpreted as a list of pop-menu options. The same goes with fields that are logical vectors. Sometimes I want a logical vector to be interpreted as the actual data and not to be as format specifiers.

I wonder if you could have had an input syntax like the following

settingsdlg(Scontent, Sformat)

where Scontent is a structure containing the desired field values and S.format is a structure with the same field names, but specifying whether to format as checkbox, pop-up menu, etc...

16 Apr 2013 Absolute Orientation - Horn's method Solves weighted absolute orientation problem using Horn's quaternion-based method. Author: Matt J

Hi Monica. You can find the derivation of the scaling factor in the original paper by Horn, Section 2D

http://people.csail.mit.edu/bkph/papers/Absolute_Orientation.pdf

Comments and Ratings on Matt J's Files View all
Updated File Comment by Comments Rating
01 May 2013 N-dimensional sparse arrays Creates an N-dimensional sparse array object, for arbitrary N. Author: Matt J Matt J

@Lauren,
Do you still have get that error? What version of MATLAB are you using? And what version of ndSparse?

You seem to be the only one with this problem, I'm afraid. It doesn't readily reproduce on my machine and I haven't received similar complaints.

01 May 2013 N-dimensional sparse arrays Creates an N-dimensional sparse array object, for arbitrary N. Author: Matt J Lauren

Hi Matt-
Not sure why my previous comment no longer appears, but I had mentioned that I get an error message when attempting to run ndstest -- the error message being something about the inputs to kron being of the wrong type, coming from line 882 of ndtest.

Thanks!

30 Apr 2013 N-dimensional sparse arrays Creates an N-dimensional sparse array object, for arbitrary N. Author: Matt J Matt J

Lauren: not clear what you meant by your "comment below". As far as I can tell, you posted no prior comments.

30 Apr 2013 N-dimensional sparse arrays Creates an N-dimensional sparse array object, for arbitrary N. Author: Matt J Lauren

I realized that (for my comment below) the problem is that one of the inputs being sent to kron is ndSparse, which appears to not be ok. (The error comes up when checking convn in line 882 of ndstest).

18 Apr 2013 Absolute Orientation - Horn's method Solves weighted absolute orientation problem using Horn's quaternion-based method. Author: Matt J monica

Thank you very much.

Top Tags Applied by Matt J
oop, operator, absolute orientation, affine, affine transform
Files Tagged by Matt J View all
Updated   File Tags Downloads
(last 30 days)
Comments Rating
13 Mar 2013 N-dimensional sparse arrays Creates an N-dimensional sparse array object, for arbitrary N. Author: Matt J sparse, ndimensional, multidimensional, oop, reshape, sparse array 47 72
  • 4.54545
4.5 | 11 ratings
06 Aug 2012 Representing Polyhedral Convex Hulls by Vertices or (In)Equalities Express bounded polyhedron via equalities/inequalities or vertices. Author: Matt J convex analysis, optimization, polytope, vertices, convex hull, convhull 21 36
  • 5.0
5.0 | 10 ratings
15 Feb 2012 Split nD-array into equal sized cells Splits an array of any dimension into cell array of equal sized chunks. Author: Matt J blockproc, tile, block, tiles, 8x8, dct 19 0
16 Oct 2011 Zero-Based Indexable Arrays (OOP Exercise) Creates arrays whose indexing starts from zero instead of one. Author: Matt J oop, zerobased, zero indexable, index from zero 4 0
05 Jul 2011 3D Rotation about Shifted Axis Computes/applies rotation about arbitrary 3D line. Author: Matt J rotation matrix, rotation, affine transform, affine, robotics, motion 52 15
  • 5.0
5.0 | 3 ratings

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