the cyclist

Alden Scientific

Last seen: Today | Attivo dal 2011

Followers: 4 Following: 0

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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.)

Programming Languages:
Python, R, MATLAB, SQL
Spoken Languages:
English
Pronouns:
He/him

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Risposto
How to create a symmetric 2D distribution from a novel distribution
I agree with @John D'Errico that we need more description. Do you just mean that you want to replicate f across another dimensio...

2 giorni fa | 0

Risposto
Box-Whisker Plot with 5 and 95 percentiles and non-symmetric distributions.
It's a bit kludgy, but here is a way to do it by directly editing the XData and YData of the whiskers and their caps. % Set see...

circa un mese fa | 0

Risposto
How to properly read a csv saved cell array.
@Walter Roberson's answer is the canonical one, to be sure. A csv simply cannot store the cell array as you hoped (and naively c...

circa 2 mesi fa | 1

Risposto
Can MATLAB files that were created in the trial version be used in the full version?
No, there should be nothing different about any MATLAB files created in the trial version. All the happens when a license expire...

circa 2 mesi fa | 1

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Risposto
How can I replace the upper off diagonal(super diagonal) and lower off diagonal(sub diagonal) of a matrix?
% Arbitrary size N=5; % Example input A = rand(N); % NxN random matrix disp(A) % Vector to set as the sub- or superdiag...

circa 2 mesi fa | 1

Risposto
How to Filter Rows of Cell Array By Date Range
Here is one way: %Date Range MinDate = datetime('14-Jul-2024'); MaxDate = datetime('17-July-2024'); %Cell Array a = cell(...

2 mesi fa | 0

Risposto
Can't click "Roll The Dice!" problem in intro to matlab cody problems therefor cannot earn badge.
I can't say for sure, but I expect that that problem was deleted from Cody (perhaps by the author). Consider contacting support...

3 mesi fa | 0

Risposto
Adjusting Y-Values in Histograms
Your question is not perfectly clear to me. If you don't want the values binned, I think you more likely want to use the bar fun...

3 mesi fa | 0

Risposto
fitlme different to lmer in R
Disclaimer: I don't fully understand the specifics on why you are seeing what you are. Thinking about my comment about being st...

4 mesi fa | 1

Risposto
ylabel changes position with ax.YAxisLocation = 'origin'
It's a bit kludgy, but rng default hold on scatter(-rand(1,10),rand(1,10),120,'or','filled') scatter(rand(1,10),rand(1,10),1...

4 mesi fa | 1

Risposto
How to determine feature importance using gradient boosting?
The model that is output from fitrensemble has a predictorImportance method for global predictor importance. You can also use s...

4 mesi fa | 0

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Risposto
What happens if I use fitcecoc for a two-class classification, and how is it different from fitcsvm in such a scenario?
Disclaimer: I have not directly tested this idea. The defalt binary learner for fitcecoc is SVM. Therefore, I would expect the ...

4 mesi fa | 0

Risposto
Accessing Fit Coefficients from Curve Fitting
data_fit is a cfit object. You can apply post-processsing steps to this object, as described in this documentation. It sounds l...

4 mesi fa | 0

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Risposto
"Try the New Desktop" icon persists even after uninstalling the add-on (New Desktop for MATLAB (Beta))
That icon is not related to your use of the beta release from the FEX. The New Desktop is always an option now (presumably until...

4 mesi fa | 1

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Risposto
"Arrays have incompatible sizes for this operation" error
It's difficult to know for sure, but I'm guessing those are the variables as they exist in the workspace, outside the function. ...

4 mesi fa | 0

Risposto
I run the code below and expect to get a uniform histogram. It's not. I don't understand why not.
It's because of your choice of 100 bins is tuned to the periodicity of your function in a way that makes it the counts chaotic n...

4 mesi fa | 2

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Risposto
Why I am not getting the same result for an integral of a piecewise function?
You have two mistakes in this code. First, you got the signs wrong on the check. It should be check1 = aux1 - (aux2 + aux3) Se...

5 mesi fa | 1

Risposto
How to save entire MATLAB workspace as a JSON file?
There is no built-in way to do this in MATLAB, and it strikes me as quite difficult to do in a way that is general enough to man...

5 mesi fa | 1

Risposto
Prevent Windows Update from shutting down Matlab session
When you say "stop my simulations from shutting down", do you mean "Have MATLAB pause the Windows update?" As a Mac user, I don...

5 mesi fa | 0

Risposto
how aggregate duraration and sum it in timetable
Here is one way: load("matlab_tt2") TT2.timeOfDay = timeofday(TT2.datt); equalDurationSum = groupsummary(TT2,"timeOfDay",...

5 mesi fa | 0

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Risposto
how to remove variables of a table with a zeros in it
% Example data x = ["a";"b";"c"]; y = [4;5;6]; z = [0;7;8]; tbl = table(x,y,z); % Find variables with a zero hasZero = a...

5 mesi fa | 0

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Risposto
Plotting error bars on grouped bar
You need the XEndPonits property of the bars. % Sample data data = [1.5, 2.3, 3.2; 2.0, 2.8, 3.5; 1.8, 2.5, 3.0]; errors = [0...

5 mesi fa | 1

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Risposto
fitPosterior warning: Why does fitPosterior output a warning when the transformation is a step function?
I would say that a warning could be warranted because perfect separability could be an indication of over-fitting, and that the ...

5 mesi fa | 0

| accettato

Risposto
i need to plus all numbers in my Array of 3x3 then divide that number by its area using save ,for loop, function
You can sum all the elements of an array using the sum function. For example A = magic(3) S = sum(A,"all") You can save to fi...

5 mesi fa | 0

Risposto
How can I make x and y axis dates with contour?
That limitation is a shame. One awkward solution is to convert the datetime values to datenums (which are purely numeric), and ...

5 mesi fa | 0

| accettato

Risposto
using PCA to filter outliers in MATLAB
There is a built-in MATLAB function, rmoutliers, for detecting and removing outliers. I frankly did not read all your code, but...

5 mesi fa | 1

Risposto
Detection of storms from precipitation data
I think this does what you want. It is easy to make minor indexing mistakes, so you should double-check: % Load data load("VE_...

5 mesi fa | 0

Risposto
How to calculate Bootstrap confidence interval
As you may have noticed already, the data have a huge variance around that fit: x = [6 10 14 20 26 34 38]'; y = [122 107 119 1...

5 mesi fa | 0

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Risposto
don't understand output of fitlme, intercept substituted for first line.
The output is not substituting 'Intercept' for a level of your coefficient. It looks like your variable voc_registers is catego...

5 mesi fa | 0

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Risposto
Does the curvefit toolbox return the equation for the best fit line (or curve)?
Yes, you can get the coefficients of the best-fit equation. @Torsten's comment illustrates where you can see them in the UI, and...

5 mesi fa | 0

| accettato

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