# 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**

I am trying to figure out how to plot my data.

You don't say what kind of figure you want. I suggest you look at the MATLAB Plot Gallery. If you see something like what you wa...

22 hours ago | 0

roots(x) vs root= interp1(y,x,0)

It's not clear, at least to me, what you mean by "root = interp1 command". But, my best guess is that if you were somehow trying...

2 days ago | 0

How to present my outcomes in the form of a confusion matrix

If you have the Statistics and Machine Learning Toolbox, you could use the confusionchart or confusionmat command.

2 days ago | 0

Defining upper and lower control limits for a graph

Here is a simple example of setting plot limits based on the data. (The last line of code is where I set the limits.) x = 1:50;...

2 days ago | 0

Create a legend according to the colors of a scatter plot

Unless I have misunderstood your question, you should be able to do this using the gscatter command. The legend will be tied to ...

3 days ago | 1

why cntrd function error

If you are talking about this particle tracking code, you might want to reach out to that team. You might not find very many peo...

4 days ago | 0

split data into 5 train and test data

You can use the cvpartition function to do this, if you have the Statistics and Machine Learning Toolbox. If you don't have tha...

4 days ago | 0

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What is the Len function do? It used to exist in MatLab 4.2, but now it doesn't any insight?

To my knowledge, there has never been a function called len() or Len() in MATLAB. But, I wonder in your case if len() is a user...

4 days ago | 1

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find first& end of array

I expect someone will post a more elegant method, but I think this does what you want S=[0 1 5 2 0 0 0 9 3 50 53 0 0 5 7 4]; ...

6 days ago | 0

How do I make a World Cup simulator with MATLAB?

You can use the randperm function to select 2 out of 4 teams to advance in each section. rng default A={'Qatar';'Ecuador';'S...

6 days ago | 0

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Hypothetical Factorial Question Solution

I don't really intend this to be a serious answer to your question, but according to the internet, this formula will work up to ...

7 days ago | 0

How to form the training set ?

I spent a little bit more time with the paper. It seems to me that in the paper, the labels y are supposed to be used when gene...

8 days ago | 0

How to deal with this grpstat error message

I think you want to use "mean" instead of "average" for the summary statistic.

10 days ago | 0

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Is it possible for matlab to print output numbers like 0.98765432 merely as .987654 with no fronting zero and only six digits (rounded) ?

x = 0.98765432; s = eraseBetween(sprintf("%7.6f",x),1,1)

10 days ago | 1

Find function in arrays

You can use the ismember function to find out whether each element of one vector is present in the other, and also the location....

11 days ago | 0

How to use bitn

I'm not sure if this is what you mean, but there are several integer classes available in MATLAB.

11 days ago | 0

How I categorize a features?

Do you mean that you have numerical values, and you want to treat those as categorical instead? You can convert numeric to categ...

11 days ago | 1

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How to form the training set ?

If I understand all of your notation correctly, I think your training set needs to be an Mx3 matrix. If means that each observ...

11 days ago | 0

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how can i find my license number ?

In the upper right of the screen here, you should see "Get MATLAB", and an icon representing your account. Click on that icon, a...

11 days ago | 0

Creating a seed for ICA on eeglab to make sure same ICA components are created every time

Put the line rng default at the start of your code. See rng for details.

13 days ago | 0

How can I use the command 'tiledlayout' inside a loop

The key is to create two different figures, each of which you can build up a tiled layout. Here is a trivial example of two fig...

13 days ago | 0

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Subplots of subplots (maybe using subaxis)

I would try the native tiledlayout function to make the subplots. I've never used beast, so I'm not sure if there are any weird ...

14 days ago | 1

permutations of 4 numbers in 7 positions IF the sum of the numbers is 600

This is a "making change" problem, where the smaller numbers can represent coins, and the large number is the total of the chang...

14 days ago | 0

How to apply SVM on training and testing data

You can use the fitcecoc function from the Statistics and Machine Learning Toolbox to fit multi-class SVMs. I've never used the...

15 days ago | 0

How to distribute random number of users within the different circles

There are several ways to do this. Here is one. I illustrated with 20 users, because with 200 users it is difficult to tell tha...

15 days ago | 0

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How to plot an x value using for loop from an input?

I have to admit that I did not fully understand your explanation. But I can tell you the specific reason you are getting an inde...

17 days ago | 0

Interpolate between specific values in a data set

You can use the interp1 function to do interpolation. x = [1, 2.2, 3, 4]; y = [0.2, 0.35, 0.4, 0.5]; x0 = 3.5; y0 = inte...

17 days ago | 0

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I have a 4x4 array of 1's and I need to turn 3 of 4 ones to zero per row at random. So there will be a one 1 left in each row.

Here is one way: N = 4; x = (1:N)'; y = randi(N,N,1); linearIndex = sub2ind([N,N],x,y); B = zeros(N,N); B(linearInde...

17 days ago | 0

New to MatLab: How to enter given data for a random variable (&find /fit distribution function)

Here is a method that does not require the Statistics and Machine Learning Toolbox: % Input data N = 100; outcome = [1; 3; 4;...

17 days ago | 0

New to MatLab: How to enter given data for a random variable (&find /fit distribution function)

If you have the Statistics and Machine Learning Toolbox, you can use the randsample function: N = 100; outcome = [1; 3; 4; 5; ...

17 days ago | 0