# 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 giorno 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 giorno 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 giorni 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 giorni 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 giorni 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...

7 giorni 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 giorni 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 giorni 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 giorni 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 giorni 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 giorni 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.

17 giorni ago | 0

what is the equivalent of 'improfile' in octave?

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

21 giorni 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 giorni 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 giorni 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 giorni 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 giorni 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 giorni 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...

25 giorni 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...

25 giorni ago | 1

Replicating one dimension of a 3d matrix

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

27 giorni 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...

circa un mese 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...

circa un mese 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...

circa un mese 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...

circa un mese 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. ...

circa un mese 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...

circa un mese 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")

circa un mese 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, ...

circa un mese 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...

circa un mese ago | 0

| accepted