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Matt J


Last seen: Today Active since 2010

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Professional Interests: medical image processing, optimization algorithms PLEASE NOTE: I do not read email sent through my author page. Please post questions about FEX submissions in their respective Comments section.

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MATLAB Answers

300 Questions
12,362 Answers

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39 Files

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5 Problems
33 Solutions

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9 Discussions

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300 Questions
12,362 Answers

ANSWER ACCEPTANCE
78.67%

VOTES RECEIVED
4,282

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201 of 21,126

REPUTATION
6,739

AVERAGE RATING
4.90

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39 Files

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87

ALL TIME DOWNLOADS
55606

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10,844
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5 Problems
33 Solutions

SCORE
598

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Submitted


Customized text modification buttons for the Matlab Editor
A pair of functions enabling simple, programmatic modification of Matlab Editor text. These can be used to make customized butto...

6 days ago | 2 downloads |

0.0 / 5

Submitted


arrayfun with scalar expansion
Version of arrayfun which allows argument arrays to have different sizes, so long as they are compatible for scalar expansion.

21 days ago | 1 download |

0.0 / 5

Submitted


A class for successive matrix products
A class representing products of matrices, internally storing/manipulating them separately.

3 months ago | 2 downloads |

0.0 / 5

Submitted


Further tools for analyzing objects in N-dimensional images
A collection of tools to supplement bwpropfilt, bwareaopen, and the like.

7 months ago | 1 download |

5.0 / 5

Submitted


Fit polyshape to objects in image
Given a 2D binary or label image of a number of objects, returns a "best-fit" polyshape to the boundaries of the objects.

7 months ago | 1 download |

0.0 / 5
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Submitted


Find vertices in image of convex polygon
Estimates the corner points of a pixelated convex polygon having a known number of vertices.

10 months ago | 1 download |

5.0 / 5
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Submitted


N-dimensional sparse arrays
Creates an N-dimensional sparse array object, for arbitrary N.

1 year ago | 5 downloads |

4.8 / 5

Submitted


gaussfitn
Fit N-dimensional scattered points with Gaussian+constant

1 year ago | 2 downloads |

5.0 / 5
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Submitted


Constrained minimum L1-norm solutions of linear equations
Finds least L1-norm solutions to linear equations C*x=d subject to linear and/or integer constraints.

1 year ago | 1 download |

5.0 / 5

Submitted


Array Concatenation with Implicit Expansion
Versions of cat(), horzcat(), and vertcat() that support implicit expansion

1 year ago | 1 download |

5.0 / 5

Submitted


spatialgraph2D
Creates a graph object with 2D spatial locations associated with the nodes

1 year ago | 1 download |

4.8 / 5
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Submitted


Block transposition, permutation, and reshaping of arrays
Analogues for transpose(), reshape(), and permute() but where sub-blocks of the array are treated as scalar elements.

2 years ago | 1 download |

5.0 / 5

Submitted


ezplane
Plot an arbitrary 3D plane given its equation.

2 years ago | 2 downloads |

0.0 / 5

Submitted


Grids of tiled chart layouts
A tool for simplifying the creation of nested tiled layouts

2 years ago | 1 download |

0.0 / 5

Submitted


Object-oriented tools to fit/plot conics and quadrics
A tool set for fitting and/or plotting various conics and quadric surfaces, e.g., ellipses, cylinders, spheres, planes, cones, a...

2 years ago | 3 downloads |

5.0 / 5
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Submitted


Tools for Processing Consecutive Repetitions in Vectors
A set of functions for labeling and manipulating groups of consecutively repeating elements in a vector.

3 years ago | 1 download |

5.0 / 5

Submitted


outputnames
Get a list of the output argument names of the currently executing function.

3 years ago | 1 download |

0.0 / 5

Submitted


Absolute Orientation - Horn's method
Solves weighted absolute orientation problem using Horn's quaternion-based method.

3 years ago | 10 downloads |

4.9 / 5

Submitted


Convert linear functions to matrix form
Obtaining the matrix representing a given linear function

4 years ago | 2 downloads |

0.0 / 5

Submitted


Intersections of multiple 2D lines or line segments
Compute the intersection of a reference line (or line segment) with a polyshape boundary or with a batch of other line segments....

4 years ago | 1 download |

4.0 / 5
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Submitted


PROB2MATRICES: A selective version of prob2struct
Obtains matrices for select parts of an optimization problem from problem-based description.

4 years ago | 3 downloads |

0.0 / 5

Submitted


3D Rotation about Shifted Axis
Computes/applies rotation about arbitrary 3D line.

5 years ago | 2 downloads |

5.0 / 5

Submitted


Analyze N-dimensional Convex Polyhedra
Find vertex or (in)equality forms of convex polyhedra in R^n (for n not super large). Also, compute their intersections and unio...

5 years ago | 6 downloads |

5.0 / 5
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Submitted


whosGPU
Provides WHOS-like output for gpuArray variables in the current workspace.

5 years ago | 1 download |

0.0 / 5

Submitted


Extract linearly independent subset of matrix columns
Loop-free code routine to find a maximal subset of linearly independent columns in a matrix

5 years ago | 4 downloads |

5.0 / 5

Submitted


ndgridVecs
A more efficient substitute for ndgrid meant to help capitalize on implicit expansion.

6 years ago | 1 download |

0.0 / 5

Submitted


Structure fields to variables
Code writing tool for importing/exporting workspace variables to or from a struct.

6 years ago | 4 downloads |

4.8 / 5

Submitted


Separable Block-wise Operations
Efficiently performs separable operations (e.g., sum, mean,prod, min, max,...) on array sub-blocks

7 years ago | 1 download |

5.0 / 5

Submitted


Quadratic minimization with norm constraint
Minimizes convex or non-convex quadratics subject to (in)equality constraint on norm(x)

8 years ago | 1 download |

4.5 / 5

Submitted


MAT2TILES: divide array into equal-sized sub-arrays
Splits an array of any dimension into cell array of equal sized chunks.

8 years ago | 6 downloads |

4.5 / 5

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