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the cyclist


Alden Scientific

Last seen: Today Actif depuis 2011

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Head of Modeling and Statistics at Alden Scientific. Obsessive runner. Professional Interests: Predictive modeling, statistics. (I don't respond to email via author page, but will usually look at a question if you send me a link to it.)

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Python, R, MATLAB, SQL
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Réponse apportée
Edges and Observed values of Chi2gof
Here's what is happening. chi2gof() is expecting the raw, observed data. It is not expecting you to have precalculated the means...

1 jour il y a | 1

| A accepté

Réponse apportée
How can you save a 1 by 3 array in each position of a 4D array?
This code creates a 4-dimensional cell array, and stores a 1x3 numeric vector in one of the elements c = cell(2,3,5,7); c{1,2,...

13 jours il y a | 1

Réponse apportée
The symbol "1" is not a scalar in integral3
Here is one way: integral3(@(x,y,z) ones(size(x)), 0,1,0,1,0,1)

2 mois il y a | 1

Réponse apportée
Data loaded successfully but not showing in workspace
Could it be something related to the scope of the variable? For example, did you load the variables (and run whos) while inside ...

2 mois il y a | 0

Question


Specifying color as hex works for plot, but not for scatter
I was caught off-guard that specifying color as a hexadecimal value works for plot(), but not for scatter(). It does seem docume...

3 mois il y a | 1 réponse | 0

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Réponse apportée
Logistic regression in MATLAB (without Statistics and Machine Learning Toolbox)
Logistic regression is an algorithm that can definitely be programmed in MATLAB, which is a general-purpose programming language...

4 mois il y a | 0

Réponse apportée
Why the speed of for loop (drawnow) is much slower in R2025a than R2016a?
What is your default figure window style (which you can get with the following command)? get(groot, "defaultFigureWindowStyle")...

5 mois il y a | 0

Réponse apportée
Help with Inequalities In Switch Statement
What is happening in the first case of your switch statement is not that it checks whether (Khat >= 0) && (Khat <= 0.14) is tr...

5 mois il y a | 0

Réponse apportée
Can I Install a MATLAB Individual License on AWS?
Yes. See this documentation on how to Run MATLAB on Amazon Web Services.

5 mois il y a | 0

Réponse apportée
Issues with overlapping graphs in nested tiledlayouts
I think you don't want the very first nexttile call, just after for i = 1:max(clsnum) which creates the "underneath" axes, th...

6 mois il y a | 0

Réponse apportée
Shading area between 2 curves (x function in terms of y)
Another (I think simpler) method is to change the "view" of the axes. This way the XData and YData properties of line up with w...

6 mois il y a | 0

Réponse apportée
Shading area between 2 curves (x function in terms of y)
I think you got yourself -- and me -- confused by swapping the definitions of what are conventionally called the X- and Y-axis. ...

6 mois il y a | 0

Réponse apportée
How to permanently undock all future generated figures R2025a
Put the line set(groot, "defaultFigureWindowStyle", "normal"); in your startup.m file.

7 mois il y a | 2

| A accepté

Réponse apportée
can not connect to Moble MATLAB
Both MATLAB Online and MATLAB Mobile had downtime earlier today. You can check the current status at the MathWorks status page. ...

7 mois il y a | 0

Réponse apportée
matlab online doesn't work
According to the MathWorks status page, there are currently (13:30 UTC, 10 June) issues with starting new sessions on MATLAB Onl...

7 mois il y a | 2

| A accepté

Réponse apportée
Differences between figure and uifigure (R2025a onward)
According to the Limitations section in the uifigure documentation, one cannot use the print() function on a uifigure.

7 mois il y a | 0

Réponse apportée
Any commands about rotation where the unit of the input is radian
I don't think there is a native equivalent of rotx() that uses radian as input. You can convert radians to degrees using the rad...

7 mois il y a | 0

| A accepté

Réponse apportée
Remove duplicates from array, some first and some last
I believe this does what you want: A = [1 0; 2 0; 3 1; 4 2; 5 3; 6 3; 7 3]; [~, ia_last]...

7 mois il y a | 1

| A accepté

Réponse apportée
How to reduce the file size of MAT files?
It's not really as simple as "rounding", as the memory requirements are dependent on the data type. But, there are different num...

7 mois il y a | 0

Réponse apportée
Cody - "server not available" when submitting solution on prime numbers question
That error does not mean your solution was not fast enough. (As I recall, there is a separate message telling you if you solutio...

7 mois il y a | 1

Réponse apportée
How can I use table() with a variable number of columns?
I assume that data, colName, and rowName are consistently dimensioned. slice = squeeze(data(jj,:,:)); TT{jj} = array2table( sl...

7 mois il y a | 1

Réponse apportée
problem to use compose
It's because your values are actually 0.7937 * 1.e-5. Try .. load('matlab_bb.mat') bbb=char(compose("%% %9.9f",bb));

7 mois il y a | 1

| A accepté

Réponse apportée
My students could not open an account in Matlab Online
MathWorks has been undergoing a ransomware attack for over a week. You can see updates at their status page. I know MATLAB Onli...

7 mois il y a | 0

Réponse apportée
"No Healthy Upstream" when trying to get to Mathworks Licensing Manager
MathWorks has been experiencing a ransomware attack. You can see the status updates at https://status.mathworks.com/

7 mois il y a | 0

| A accepté

Réponse apportée
Transfer history to MATLAB 2025a
I did not know the answer to your question, so I decided to as in the AI Chat Playground. Here is what it came up with. In MATL...

7 mois il y a | 0

Réponse apportée
Would kfold loss values vary if cross validation is performed after model training?
The predictions will be identical, as long as you use the same fold assignments: % Set seed, for reproducibility rng default ...

8 mois il y a | 0

| A accepté

Réponse apportée
How to create a pdf from the histogram
You can use the histogram function to create and plot a histogram. You can use the ksdensity function to estimate a non-paramet...

8 mois il y a | 1

| A accepté

Réponse apportée
More unexpected behavior multiplying an array with a double
Using the simpler example that @Stephen23, posted S(1).x = pi; S(2).x = sqrt(2); S.x Note that S.x is not a double array. ...

8 mois il y a | 1

| A accepté

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How does one obtain the covariance matrix for the fixed effects from fitting a mixed effect model using fitlme or fitlmematrix?
A LinearMixedModel object lme has a CoefficientCovariance property, which you can obtain with lme.CoefficientCovariance This i...

8 mois il y a | 0

| A accepté

Réponse apportée
Hyperparameter optimization fitrnet not working
Per the documentation for fitrnet ... "You can use an array ResponseVarName to specify multiple response variables. (since R202...

9 mois il y a | 0

| A accepté

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