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Matt J


Last seen: Today Aktiv seit 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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Beantwortet
Precision lost when combining Int32 integers with single precision numerical numbers
I wasn't there when the decision was made, but I suspect it would be because in Matlab, numeric literals are always double float...

ein Tag vor | 0

Beantwortet
Scatter‐plot marker edge color turns black when copying to PowerPoint
If you download export_fig, https://www.mathworks.com/matlabcentral/fileexchange/23629-export_fig?s_tid=srchtitle and if you...

2 Tage vor | 0

Beantwortet
Readtable and Readmatrix Ignore Specified Range and Produce Extra Variables
When I save as .xlsx, it seems to work okay, in1 = readtable('2025-03-28_02-07_10-0.xlsx', 'ReadVariableNames', false, 'Range',...

2 Tage vor | 0

Beantwortet
Connecting points on opposite end of mask
load('coping_data (1).mat') img=logical(img); n=height(points); f=@(z,n)circshift(z,-n); x=points(:,1)'; dx=diff([x,x(1)...

2 Tage vor | 0

Beantwortet
concatanate arrays upon condition
The way your data is held, as separate enumerated variables, doesn't leave many options. The first thing would be to undo that: ...

2 Tage vor | 0

Beantwortet
Clean and automate indents in scripts an live scripts
Download my editorExtract and editorReplace tools, https://www.mathworks.com/matlabcentral/fileexchange/181000-customized-text-...

3 Tage vor | 1

Beantwortet
appDesigner: How to set tree checkbox names = names of .xlsm files in the directory
Something like this, function startupFcn(app) % Get .xlsm files in the current directory (or specify full path) docFi...

5 Tage vor | 0

Beantwortet
estimate camera parameters with fixed translation z value?
Not with estimateCameraParameters. You will have to implement your own constrained routine using lsqcurvefit or lsqnonlin, but y...

5 Tage vor | 1

Beantwortet
Finding coordinates of a point from bisector of two lines
M1=P1/2; Q1=norm(M1)*P2/norm(P2);

5 Tage vor | 1

Beantwortet
The coefficients of a Hermite polynomial
syms t n = 4; % Degree of the Hermite polynomial H = hermiteH(n, t); % Generate Hermite pol...

9 Tage vor | 1

Beantwortet
get validation loss and metric for the best network
You would have to interpolate the validation history data at the best MSE, probably. But keep in mind, the best MSE does not r...

9 Tage vor | 1

Beantwortet
background subtraction to detect human
Something like this, perhaps? load data [r1,b1,g1]=imsplit(img1); [r2,b2,g2]=imsplit(img2); mask = imopen( abs(r1-r2)>50 &...

10 Tage vor | 0

Beantwortet
Import markup into LiveScript
The best workaround I can find is to make a small mfile and embed the marked-up text in comments, %% % For a given energy |E|...

10 Tage vor | 0

| akzeptiert

Beantwortet
A question about text string concatenation
Using [] are for concatenating char vectors, but some of your variables are apparently strings. But you can remedy this with str...

10 Tage vor | 1

Gesendet


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...

11 Tage vor | 12 Downloads |

0.0 / 5

Beantwortet
Tabular assignment extremely slow
No demo code? Tsk...tsk.. But if I were to guess, it is because you are using brace indexing for row-wise access like in the c...

11 Tage vor | 0

Beantwortet
Nonlinear regression of multiple datasets with different functions but wit some shared parameters between datasets
You would probably need to use lsqcurvefit. There is nothing about having multiple data sets, following different functions, tha...

11 Tage vor | 0

| akzeptiert

Frage


Import markup into LiveScript
If I have some text with LaTeX and other markup like the following, For a given energy |E|, the *primary*...

11 Tage vor | 3 Antworten | 1

3

Antworten

Beantwortet
Using regionprops to detect circles in an image
For this, you will need to download, https://www.mathworks.com/matlabcentral/fileexchange/87584-object-oriented-tools-to-fit-pl...

11 Tage vor | 0

| akzeptiert

Beantwortet
Estimate area under a curve using finite approximations (lower sum with 4 rectangles of equal length)
f= @ (x) x.^2; x1=0; x2=1; n=4; value=0; dx=(x2-x1)/n; % width of rectangle for k=0:n-1 c=x1+k*dx; va...

11 Tage vor | 1

Beantwortet
how can I plot inset of a new plot in a few of my subplots (say ha(1) and ha(3))?
I know that I should use axes('Position',[.5 .5 .2 .2]); box on; No, you have to set the Position of the inset axes relative t...

12 Tage vor | 0

Beantwortet
downloadTrainedNetwork not found (deep learning toolbox?)
This well get you all the required functions, openExample('images_deeplearning/Segment3DBrainTumorsUsingDeepLearningExample')

13 Tage vor | 0

| akzeptiert

Beantwortet
Unrecognized field name "constrviolation" in MultiStart when function to fit contains an integral
Well, I think it's a bug. So you should report it. However, I find that it goes away if you don't use PlotFcns, so it's definite...

13 Tage vor | 0

| akzeptiert

Beantwortet
How to Solve Linear Complementarity Problem (LCP) with MATLAB ?
You could do it with quadprog, but you may as well just deploy it as an optimproblem. n=5; q=-rand(n,1); M=rand(n); M=(M+M')/2;...

13 Tage vor | 0

| akzeptiert

Beantwortet
how to catch object "button"
You have it already. app.Button is the handle to that button, unless you've renamed it to something different from the text disp...

15 Tage vor | 1

Beantwortet
use "set" with trasparent color
It's undocumented, I believe, but you can control line transparency by setting the Color property to a 4-element RGBA value. h=...

16 Tage vor | 0

| akzeptiert

Beantwortet
How to convert a column of float or not data into double?
It is not possible for an array to hold both numeric floats and chars unless it is a cell array. That being the case, it is easy...

16 Tage vor | 0

Beantwortet
Abfload error - colon operands must be real scalars
Replace with, h.protocolName=char(BigString(tmpIx1(1):tmpIx2(1)+3))';

17 Tage vor | 1

| akzeptiert

Beantwortet
Inheritance, abstract and constant properties.
Something like this, perhaps? classdef myclass methods (Static) function valid=approveProps(classname) ...

18 Tage vor | 0

Beantwortet
How do I exclude the first ten observations in the line plot generated by the three differential equations
One way, tspan = [0 100]; y0 = 0.7; % initial value of state variable x1 r0 = 0.7; % initial value of state...

18 Tage vor | 0

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