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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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...

4 hours ago | 9 downloads |

0.0 / 5

Answered
Index exceeds the number of array elements
Either testarray is shorter than you planned or sentsize(1) is larger than you planned. Specifically sentsize(1)+35 is exceedin...

17 hours ago | 0

Answered
Obtain Pixel Shift from Registered Images
There's no reason you can't use the tform from imregtform to imwarp the original images, even if the registration was done on cr...

20 hours ago | 0

Answered
Trouble using container with cell type for key and structure array for values..
Perhaps use a dictionary, instead of containers.Map? keys = compose("A0%.2d" , 1:15); values = struct('abc', num2cell(1:15));...

21 hours ago | 1

Answered
How to prevent parfor from slowing down towards later iterations?
Is there a way to change this? I suspect not. Firstly, if you have reduction variables, the workers that aren't iterating aren'...

2 days ago | 0

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How can I reduce the "method error" with my central-difference method, when estimating a Jacobian matrix of partial derivatives?
Try making the step size adaptive to the evaluation points. E.g. f=@(x) x.^3; %function g=@(x) 3*x.^2;%true derivative G=@(x...

3 days ago | 0

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Answered
How can I draw a circular trend line in a heat map?
If the trend line is supposed to be elliptical, you can use gaussfitn, https://www.mathworks.com/matlabcentral/fileexchange/691...

3 days ago | 1

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Answered
How do I add semi-colons to lines of MATLAB code automatically in MATLAB?
You can use favoriteForceSemicolons.m from this File Exchange download, https://www.mathworks.com/matlabcentral/fileexchange/18...

5 days ago | 0

Answered
Is there a way to suppress command outputs to command window?
As a partial solution, you can use favoriteForceSemicolons.m from this File Exchange download, https://www.mathworks.com/matlab...

5 days ago | 0

Answered
Keyboard shortcut to evaluate current line?
I have created this File Exchange submission, https://www.mathworks.com/matlabcentral/fileexchange/181000-customized-text-modif...

5 days ago | 1

Answered
Programmatically paste into the Matlab Editor
I have created this File Exchange submission, https://www.mathworks.com/matlabcentral/fileexchange/181000-customized-text-modif...

5 days ago | 1

| accepted

Answered
How to save the proceesed image in the same size as input image
outputImage=imresize(outputImage,OutputSize=size(inputImage)); imwrite(outputImage , filename);

5 days ago | 0

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Answered
coneprog 代码生成过程中报错：'secondordercone' not supported for code generation.
Upgrade to R2024b where it is supported, https://www.mathworks.com/help/releases/R2024b/optim/ug/coneprog.html#mw_9834fbc9-e577...

5 days ago | 0

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Answered
How can we see yticks below zero as positive and keep labels updated when zooming in?
x=linspace(-1,1); plot(x,x.^3); yline(0); ax=gca; ax.YTickLabels = erase(ax.YTickLabels,'-');

7 days ago | 0

Answered
Matrix is generating one larger than it should be
Does it help to remove the +1 from this line? Or, perhaps the loop should run from n=1:Z. Otherwise the finalcolumn of q never ...

7 days ago | 0

Answered
How to expand a matrix and interpolate between values?
See retime, e.g., T=timetable(hours([1;2;3]),[1.1,5.6,3.2]', ... 'DimensionNames',{'Time','Degrees C'}, ... ...

7 days ago | 0

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Answered
Extract consecutive elements from a vector in a sliding manner
A = [1 ;2 ;3 ;4 ;5 ;6]; Ar=reshape(A,2,[]); for i=1:size(Ar,2) A_slice=Ar(:,i) end

8 days ago | 1

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Answered
Help me get this shape on the masks
This requires a File Exchange download, https://www.mathworks.com/matlabcentral/fileexchange/71226-tspsearch load BW dsk=@...

9 days ago | 1

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Answered
What do you think of my numerical Jacobian, using the central-difference method?
I'm assuming rdots and rddots are symbolic functions, based on your previous posts and on the fact that you have concatenated th...

9 days ago | 0

| accepted

Question

Programmatically paste into the Matlab Editor
I have highlighted a selection of text in the Matlab editor. I would like to run a command, in the command window, that will rep...

10 days ago | 1 answer | 0

1

answer

Answered
My 6x6 symbolic Jacobian matrix is massive, and matlabFunction( ) is having trouble writing the corresponding numerical function file.
Maybe just compute the Jacobian numerically, by finite differences? If the analytical expressions for the Jacobian are that mass...

11 days ago | 0

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Answered
Generating dynamic legend without duplicates
One way: load Inputs mySelectedPalette = myPalette24; % Code Block 1 % Split input data into a section below trade exces...

11 days ago | 0

Answered
Manual Input of Classes for unet Deep Learning Network
This worked for me: load('debug.mat') %Reorganize training data T=training_data.UnderlyingDatastores{2}.readall; T=reorder...

12 days ago | 0

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Answered
Why "saveobj" is invoked two times when saving a object?
I don't know why saveobj is called twice. Perhaps the first call is so save() can obtain a template of the object to be stored i...

13 days ago | 0

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Sparse matrix division results in "array exceeds maximum array size preference" in one case but not another
When circ_pml = 1, your URyy matrix conatins Inf values. This confuses inv,mrdivide, and other similar operators.

14 days ago | 1

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Answered
How do I get each iteration of a for loop into a single row matrix?
Data=[ 11 17 13 4 12 8 12 10 7 14 12 6 10 14 11 ...

14 days ago | 0

Answered
How to replace multiple xlsread commands
data1 = {'dog',1,3,'cat'; 10 12 'fish' 17} idx=cellfun(@isnumeric,data1); NUM1=nan(size(data1)); NUM1(idx)=cell2mat(data1...

14 days ago | 0

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Answered
Constraint tolerance setting is not working
You need to demonstrate the problem with code, but based on your description, nothing is obviously wrong as far as the constrain...

14 days ago | 0

Answered
Extract Text and Values from String
str = 'AB(16.7)CD[20.6]EF[.1] 864.4 Round'; S=strsplit(str,{'(',')','[',']',' '}); Types=S([1,3,5]) Vals=str2double(S([...

16 days ago | 1

| accepted

Answered
find the value of x
Hint (because it's homework). See fzero.

16 days ago | 0