# the cyclist

### Alden Scientific

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

**Statistics**

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**Content Feed**

two for loops in parallel

If I understand you correctly, you don't need two for loops, and this will do what you want M=5; x=0; A=[1 4 7 10 13 16 19]; ...

1 jour ago | 0

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24 Hours for run my for loop

Without seeing your code, it is impossible to know specifically what are possible approaches to speed it up, but two possibiliti...

1 jour ago | 0

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How can i interpolate 1-D data, whit y especified values?

Unless I'm missing something, it sounds like you just want to interpolate x from y, instead of y from x: x = [1 2 3]; y = [1 4...

5 jours ago | 0

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Hello everyone, I want to restrict the domain of a vector to return it to a smaller data set. For example, X between 2 and 7

X = [ 1 2 3 4 5 6 7 8 9 10 ]; idxToKeep = (X>=2) & (X<=7); Xkeep = X(idxToKeep) You can also do it all in one...

7 jours ago | 0

chose the marker with plot3d

It looks like you used a hyphen instead of an underscore. x = 1:5; y = rand(1,5); z = rand(1,5); figure plot3(x,y,z,'blac...

7 jours ago | 0

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How to improve regression models for a dataset with too many variables?

@NC_, as I expect you realize, your question is not really a MATLAB question, but is a generic machine learning question. You ar...

8 jours ago | 0

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i trying to 3d plot, but mesh nor plot3 worked

This is what I get from your equation: xv = -5 : 0.01 : 5; yv = -5 : 0.01 : 5; [x,y] = meshgrid(xv,yv); f = 10*x.^2.*y -...

8 jours ago | 1

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How can I find negative factorial ? (-0.5)!

Use the gamma function: x = -0.5; gamma(x+1) % gamma(x+1) is equal to factorial(x)

9 jours ago | 1

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Converting Matrix to base b fails

dec2base returns a character array representation that can be multiple characters: dec2base(7,2) % "convert" decimal 7 to base ...

9 jours ago | 0

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How can I insert a title under a group of subplots?

Personally, I would use the more modern tiledlayout (rather than subplot), but then add your text using an annotation (or just t...

12 jours ago | 1

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Unable to perform assignment because the size of the left side is 1-by-1

My best guess as to the problem is that in this expression ones(1,k+i)-K(k+i) you don't really intend to add a vector of ones ...

17 jours ago | 1

Set one common Xaxis for a sublot with rows = 1 and columns = 2

You may find the linkaxes command useful. You can also share properties (e.g. titles, xlabels) in a tiledlayout.

18 jours ago | 0

what is the equivalent of 'improfile' in octave?

This Octave wiki page suggests that the improfile function is missing from Octave.

21 jours ago | 0

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How do i delete the spaces that are in the middle of a string array?

Here is one way: str=' 123 456 '; str(str==' ') = [] This method relies on the fact that the white space is a space cha...

23 jours ago | 1

Curve smoothing / fitting

Do you mean you want a smooth line that goes through all the points? You could fit a spline: % Set seed for reproducibility rn...

23 jours ago | 0

Want to be able to call python 3.9 from MATLAB 2022a

I am not on a Windows machine, but I am pretty confident you want to download and run the last one you listed, the 64-bit Window...

23 jours ago | 0

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Count the number of "aggregate" peaks in a vector?

I am absolutely positively NOT an expert in this, but I think what might be helpful here is putting your signal through a low-pa...

25 jours ago | 1

How to increase the distance between labels on the matrix axes

When you say that making the font size smaller "didn't work", can you be more specific? Do you mean that even with the smallest ...

25 jours ago | 0

What kind of coding do I need to create a program that will recognize the word I am saying and repeat that same word to me?

Take a look at the documentation on how to Record and Play Audio in MATLAB. FYI, it took me literally a few seconds to google t...

26 jours ago | 0

please explain this code

I ran your code here. You can see that figure it creates. That's what the code does. It defines some data, does some calculation...

26 jours ago | 1

Replicating one dimension of a 3d matrix

If M is your array, then output = repmat(M,[10,1,1]);

27 jours ago | 1

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Matlab does plot datetime data (only hours) on wrong day

The most fundamental fix to your issue is to explicitly use the modern datetime format for your times. Then, downstream function...

environ un mois ago | 0

How to split a 3 by 3 matrix into rows and save rows separetly in arrays

ra = NewRange(1,:); rb = NewRange(2,:); rc = NewRange(3,:); Be aware that you may not actually need to do this separation, be...

environ un mois ago | 0

predictorImportance changes between releases

Are the ML model results themselves identical? Off the top of my head, I don't know enough about the algorithm and possible cha...

environ un mois ago | 0

How to add a line break in categorical array?

Here is one way: X = categorical({sprintf('First Inter-monsoon\\newline (March - April)'), ... sprintf('South...

environ un mois ago | 1

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using eval with save function

It can be tricky to construct the string needed, from a combination of text and numerics. I would recommend a few things here. ...

environ un mois ago | 1

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add value from single element of array

Your example is confusing to me, partly because I think you made some careless math errors. But, the way I could approach this i...

environ un mois ago | 0

remove the frequent values withou sorting

You can still use unique: x = [3 4 3 5 1 0 4 2]; x = unique(x,"stable")

environ un mois ago | 1

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Show Statistics in a Special Figure

One approach would be find a plot (or plots) in the MATLAB Plot Gallery that look similar to what you want, download that code, ...

environ un mois ago | 0

run matlab on cloud platform

Yes, there are cloud platform options for running MATLAB. I suggest taking a look at this documentation to get started. (FYI, t...

environ un mois ago | 0

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