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Matt J


Last seen: Today 自 2010 起处于活动状态

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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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已回答
Trying to normalize a matrix across all element values.
Normalize across only non-zero elements, or across elements only in the upper triangle? If the latter, then, A=[ 0 54 0 ...

1 hour 前 | 0

已回答
Issue with Blockproc when using PadPartialBlocks
Integer types cannot hold NaN values, so you will have to convert your int8 input to floating point: load('ImgForBlockProcQ...

6 hours 前 | 1

| 已接受

已回答
Why does specifying the size of a class property slow down writes?
The property validation specifications have to be processed every time you make an assignment to the buffer property. This takes...

21 hours 前 | 0

已回答
Issue with Blockproc when using PadPartialBlocks
what am I doing wrong? Nothing you've shown us currently. The border values will/should be NaNs as you expect. J = blockproc(r...

1 day 前 | 0

已回答
Suppress real part of complex number for cleaner display
ys_abc = inv(zs_abc) str = formattedDisplayText(imag(ys_abc) +"i"); disp( erase(str ,'"') )

3 days 前 | 0

| 已接受

已提交


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...

5 days 前 | 2 次下载 |

0.0 / 5

已回答
Transition point discontinuity (cliff/spike) in plots of solved system of non linear equations.
I find it strange that you are using fsolve for a 1-variable problem, rather than fzero. You don't show the objective function, ...

10 days 前 | 0

已回答
Create help for method with arguments
The Quick Access Toolbar function favoriteArgs2Help.m, now available in this FEX submission, https://www.mathworks.com/matlabce...

11 days 前 | 0

| 已接受

已回答
splitapply does not retain ME stack
Run with Pause on Errors. Then the code will stop at the offending line:

12 days 前 | 0

已回答
Effect of GA Parameters on Convergence
You need to look at the final fval achieved as a function of N. If the irregular solutions have a lower fval than the regular so...

13 days 前 | 0

已回答
How to change the size / ratio of a figure
Perhaps as follows? axis tight dx=diff(xlim); dy=diff(ylim); xmax=dy/(9/11)/2; xlim([-xmax,+xmax])

16 days 前 | 0

已回答
solving a system of linear equations where A is a 40*40 sparse matrix
You should use \. It's not just about precision, though. It's also about speed: A=sprand(400,400,0.2)+speye(400); b=rand(400,1...

16 days 前 | 1

已回答
Is the Order of Function Evaluation Guaranteed when Function Outputs are Concatenated into an an Array?
This reasoning might not be bulletproof, but I think the order of funtion calls in any expression has to always go left to right...

18 days 前 | 0

已回答
Calculating 6D Estimation (3 Translations and 3 Rotations) from Two Orthogonal Detectors Output ((X, Y, Thea, Roll)
Spreaking for myself, the provided Fig1.png does not help me understand how a 6DOF 3D pose maps to a 4DOF projected pose (X, Y, ...

18 days 前 | 0

已回答
Unable to move editor pane to rightmost column
One way is to right-click on the command window bar and select the appropriate option from "Move Command Window": ...

20 days 前 | 0

已回答
Use of matlab.apps.AppBase outside of AppDesigner
It's not clear why you would need to migrate away from them if they do what you want. If you need a deeper understanding of what...

20 days 前 | 0

提问


Mixing name/value pair syntax
In a Matlab seminar a few years ago, I asked why function calls that mix old style and new style name/value pair syntax would on...

21 days 前 | 0 个回答 | 2

0

个回答

已提交


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 前 | 1 次下载 |

0.0 / 5

Discussion


Would comma-separated list expansion for non-cell arrays be a good thing?
Frequently, I find myself doing things like the following, xyz=rand(100,3); XYZ=num2cell(xyz,1); scatter3(XYZ{:,1:3}) Bu...

21 days 前 | 0

提问


Would comma-separated list expansion for non-cell arrays be a good thing?
Frequently, I find myself doing things like the following xyz=rand(100,3); XYZ=num2cell(xyz,1); scatter3(XYZ{:,1:3}) But...

21 days 前 | 0 个回答 | 0

0

个回答

提问


Performance of MEX versus builtin functions
When Matlab calls a MEX file, is there overhead that makes the call slower as compared to a built-in binary like min, max, etc.....

22 days 前 | 1 个回答 | 0

1

个回答

已回答
Putting spaces between elements of a string/
A=['011001110000' '101111000000' '110100011000' '011010001100' '010101000110' '110010100010' '1000010100...

23 days 前 | 1

已回答
Implicit expansion with arrayfun (cpu vs gpu)
Remember that arrayfun (on the CPU) is nothing more than an M-Code for-loop in disguise. Therefore, it is not hard to write your...

24 days 前 | 1

| 已接受

已回答
Implicit expansion with arrayfun (cpu vs gpu)
I agree it is confusing, but the gpuArray version of arrayfun was never intended as a direct analgoue of the CPU version. Additi...

24 days 前 | 1

已回答
How to prevent image cropping after registration?
The problem is my fixed image only covers the top half of the head whereas I want the output to contain the whole head. But th...

26 days 前 | 0

提问


Adding a class-related function to appdesigner app
Is there a way, in appdesigner, to create a class-related function, i.e., a function that is local to the app's classdef file, b...

26 days 前 | 1 个回答 | 0

1

个回答

已回答
Cut, Copy, Paste icons missing
Looks like they've been removed in R2025. However, you can easily program and install your own cut/copy/paste buttons on the Qui...

28 days 前 | 0

已回答
Adding multiple function plots to a single figure with subplots - MATLAB
This might be what you want: Manipulators={manipulator1,manipulator2,manipulator3}; m=3;n=2; %tiling dimensions %create h...

29 days 前 | 0

已回答
Construct voronoi diagram on a point cloud
Using the attached file and this FEX download https://www.mathworks.com/matlabcentral/fileexchange/30892-analyze-n-dimensional...

1 month 前 | 0

已回答
How to generate orthogonal X-ray Projection, Digitally Reconstructed Radiographs (DRR), from a particular CT volume
This is a popular Matlab compatible library, https://github.com/CERN/TIGRE/blob/master/Frontispiece/MATLAB_installation.md It...

1 month 前 | 0

| 已接受

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