# 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**

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...

2 días ago | 0

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...

5 días 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...

5 días ago | 0

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...

5 días 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 -...

5 días 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)

6 días 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 ...

6 días 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...

10 días 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 ...

15 días 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.

15 días ago | 0

what is the equivalent of 'improfile' in octave?

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

19 días 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...

21 días 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...

21 días 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...

21 días 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...

23 días 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 ...

23 días 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...

23 días 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...

23 días ago | 1

Replicating one dimension of a 3d matrix

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

25 días 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...

29 días 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...

alrededor de 1 mes 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...

alrededor de 1 mes 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...

alrededor de 1 mes 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. ...

alrededor de 1 mes 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...

alrededor de 1 mes 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")

alrededor de 1 mes 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, ...

alrededor de 1 mes 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...

alrededor de 1 mes ago | 0

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How do I set a parameter based on individual values in an existing array? Should I use a for loop or something else?

My best guess here is that L is a vector, and you are expecting the if-else logic to work on the entire vector simultaneously. T...

alrededor de 1 mes ago | 0

whats wrong with this code?

In addition to the issues that @dpb mentioned, you also have simple syntax errors in your code. My best guess as to what you in...

alrededor de 1 mes ago | 0