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the cyclist


3,636 total contributions since 2011

Principal Scientist at PatientsLikeMe; Obsessive runner. Professional Interests: Predictive modeling, statistics.

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Answered
Serious mistake installing Matlab
Does this documentation page about uninstalling MATLAB help?

5 days ago | 0

Answered
How to write cell arrays in Excel?
I use cellwrite from the File Exchange.

5 days ago | 0

Answered
I would like to call a row element from a matrix however, the row is written inside another matrix
If T is the temperature matrix, then it sounds like maybe you want to do T(A(1)) Or use a loop to access more rows of T? for ...

5 days ago | 1

Answered
ismember 0×0 empty logical array to logic
Making a huge guess here, but are you sure you don't mean ~ismember(ID,A) rather than ~ismember(A,ID) Then, assuming ID is a...

6 days ago | 0

Answered
replace random data with dataset
My best guess at your error is that your randomly generated data consists of two [1 x numP] row vectors, but when you read your ...

8 days ago | 0

Answered
How to find a polynomial of degree 2 that fits the given data with minimal approximation error? and then sketch discrete points and the graph of the polynomial
You could use the polyfit and plot commands (and of course a few more fundamental calculations like subtraction) to do this.

17 days ago | 0

Answered
draw circle through two given points in plot
In general, there are an infinite number of circles that pass through two given points. If you don't care which one, then one p...

21 days ago | 1

Answered
Reading file with variable name
for n = 1:16 filename = sprintf('PPT%d.TXT',n) end That loop creates the filenames you need, with the '%d' in the sprintf...

22 days ago | 1

Answered
Why the result of GMM(Gaussian mixture model) is not the same for twice calculation?
There is a random component to the fitting algorithm. The results will not be exactly the same each time, because the pseudorand...

28 days ago | 0

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Answered
Creating new dataset corresponding to certain name within a variable column
Here is one possible way. (It assumes your table's variable name is tbl.) outcome = tbl(ismember(tbl.bottle,'C-a'),:);

1 month ago | 0

Answered
Boxplot and Dimensions Arrays
If you define your original arrays as column vectors, instead of row vectors, your code will work. Try this instead: %msf for s...

1 month ago | 0

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Answered
Removing vertical line from the script window
From the Command Window: MATLAB --> Preferences --> Editor/Debugger --> Display Increase the right-hand text limit.

1 month ago | 0

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Answered
Center of two points (positive and nenegative values)
I believe your calculation is correct for negative values of v. The problem is that the point may not lie between the two input ...

1 month ago | 0

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Answered
how to test if multiple distributions are statistically different from each other?
What is reported in that table are the parameters of lognormal distributions. Because the parameters are different, those distri...

1 month ago | 0

Answered
Missing factor using rule of three?
Try (0.004*4*pi)/(2*pi) The reason your syntax does not work is that it will divide by 2, and then multiply by pi. See order ...

1 month ago | 1

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Answered
How can I average the first 14 columns, the second 14 columns, and so on and so forth?
Assuming you actually want to average over columns (see my question above), I believe out = movmean(M,[0 13],2); out = out(:,1...

2 months ago | 1

Answered
delete rows from matrix if some of its elements equal all elements in another rows another different dimension matrix?
Here is one way: Sw = [2 3 6 25 11 3 6 7 8 9 3 6 25 8 9 3 6 25 11 11 3 4 5 6 25 4 ...

2 months ago | 0

Answered
Can copula PDF value exceed 1?
Yes, a probability distribution function can have values greater than 1. Remember that the PDF is not the probability at that l...

2 months ago | 0

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Answered
What happen with confusion matrix ?
It looks like you have 55 observations. 51 of them were classified correctly (along the diagonal, indicated in green). But 4 of ...

2 months ago | 0

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Answered
Vectorized Search of substrings in Cell Array
Discovered a much cleaner way: contains(t,'bc');

2 months ago | 0

Answered
Vectorized Search of substrings in Cell Array
Here is one way: cellfun(@(x)not(isempty(x)),strfind(t,'bc'))

2 months ago | 1

Answered
Conversion of any base (n) to a base 10 number?
There is a thorough answer to this question here.

3 months ago | 0

Answered
How to create this matrix without hardcoding the values
Here is one way. r = [ 1.5355 + 0.0000i -1.0914 + 1.0781i -1.0914 - 1.0781i 0.3621 + 1.3117i 0.3621 -...

3 months ago | 0

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Answered
how to make a curve of Poisson, Rayleih, t , ....etc distribution of my random data (in histogram)
If you have the Statistics and Machine Learning Toolboox, then you could use the fitdist function. It will fit a large variety o...

3 months ago | 0

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Answered
gevfit error: Operands to the || and && operators must be convertible to logical scalar values
That code works for me, in both 2018b and 2019a. Does this happen with a freshly started instance of MATLAB? If so, you might ...

4 months ago | 0

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Answered
how to find out wether the array is Hill or not?
I think this is right, but I have to admit I have not thoroughly checked it: % Original data a=[1,2,2,3,3,4,4,2,-1,-1]; % F...

4 months ago | 0

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Answered
are there workbook front ends for matlab?
Live scripts and functions are a notebook-like functionality within MATLAB.

4 months ago | 0

Answered
how can I generate data mixture of 2 Normal distributions and has the form f(x) = 0.4X1 + 0.6X2 where X1 ~ N(0.4 ,0.15^2) and X2 ~ N(0.7 , 0.09^2)?
Here is one way: % The number of random samples to generate N = 10000; % First, generate a binomial variable, which 40% of ...

4 months ago | 1

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Answered
Accumulate previous values in time serie
You should be able to use the movsum command.

4 months ago | 0

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