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the cyclist


Alden Scientific

Last seen: 1 día ago Active since 2011

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

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Answered
Datetime won't recognise some cells
Two minor but important changes to your syntax: datetime(data.TimeofDay,'InputFormat','HH:mm:ss.SSS') Note that I used 'Input...

1 día ago | 2

Answered
i want to create a 2 dim matrix which creates 1000 rows vs 1000 columns which will look like a table, if the prime number occur output 1 in the cell and if not prime output 0
I think this does what you want. I used 100 numbers in a 10x10 array to illustrate. Just change N to 1000. N = 10; Prime_matri...

4 días ago | 0

Answered
Replace only values in y axis
Does this do what you mean? rng("default") % Data to plot x = 1:10; y = rand(1,10); % 11 arbitrary numeric labels for y...

4 días ago | 0

Answered
convert a x y z data(1D) to MxN matrix without having NaN values in Z matrix?
If you are using interp3 (or related functions), extrapolated values will automatically be set to NaN, for some interpolation me...

5 días ago | 0

Answered
How to iterate until a point satisfies a certain condition?
You need to code the condition into a while loop. (I didn't fully understand the condition, so I can't be more specific than th...

8 días ago | 0

Answered
Changing data from a list to a matrix
Can we make a simplified example, to understand what you mean? Suppose you just have 3 columns of data, and your function is f(x...

9 días ago | 0

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Answered
How to fill surface with interpolated values?
Your code does not seem to have a call to interp2, so I'm not sure what might have gone wrong there. If you did not specify an ...

10 días ago | 0

Answered
add a row of summary statistics in a table
Here is one way: % The table T = table([10;5],[17;18],'VariableNames',{'visitor','temperature'},'RowNames',{'New York','Chicag...

11 días ago | 0

Answered
How can decimals not be rounded
Here is one way: roundTo = 2; % Set this value float_number = 5.126; % User's value % Algorithm roundToPower = 10^roundTo;...

14 días ago | 1

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Answered
Why I am getting Same p-value, h and stats while using Wilcoxon Rank test for 7 different data set?
That test statistic only depends on the count and relative ordering of the respective set elements. In your case, it looks like ...

16 días ago | 0

Answered
find the best linear regression model using stepwiselm
First, I feel obligated to mention that stepwise regression is often criticized as a technique. This wikipedia article discusses...

19 días ago | 0

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Answered
Error usin .* Too many output arguments. How to save three variables at the same time in a loop?
Given the image of the calculation you posted, I think you want matrix multiplication, not elementwise multiplication: [V01(a,1...

21 días ago | 0

Answered
Randomly generated numbers do not change themselves with each iteration
Can you post your code? This miniature version of what you described seems to work. rng default format long for l = 1:4 ...

21 días ago | 0

Answered
check each element of random vector c=[0, 1, 0, 1,.....n] one by one if value of current element is 0 and previous element is 0 perform this action otherwise another action.
I didn't fully understand what you are trying to do with your code, but I think the following will help you. To find all the lo...

21 días ago | 0

Answered
How to extract matches from results of a regexp match
Even when using a single character array input along with the 'match' option, MATLAB has to return outputs in a cell array, to b...

22 días ago | 0

Answered
Overloading math operations on cell arrays
Your question is not perfectly clear to me, but it seems that cellfun might do what you want: A = {1,[2,3;4,5],6}; B = {2,[3,4...

22 días ago | 0

Answered
plotting 2 models on one histogram
Here is a hint to get you started. N = 1000; x1 = randn(N,1); x2 = randn(N,1) + 2; figure hold on histogram(x1) histogr...

22 días ago | 0

Answered
Is it suitable to include dependent varible when conducting PCA?
I've never used PCA on time series data, and I had never heard of anyone doing so, but googling PCA time series does turn up som...

25 días ago | 0

Answered
How to write to in MATLAB, translated from R
String concatenation in MATLAB can be done as "addition": i = 7; "output/" + i + "_script.m"

27 días ago | 0

Answered
write superscript in string
It could be the interpreter. Does this work for you? R2 = 0.75; t = sprintf('R^2 = %0.2f',R2); title(t,'interpreter','tex') ...

29 días ago | 0

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Answered
How to replace non consecutive value on a vector?
Here is an absolutely terrible, obfuscated way to do this: A = [5,5,5,5,5,4,5,5,5,5,4,4,5,5,5,5,4,4,4,5,5,5,5]; SA = char(A)...

30 días ago | 0

Answered
Vector as an input in function
a = 2; b = 3; v = [a; b]; f_out = f(v) function out = f(v) out = 5*v(1) + 7*v(2); end

alrededor de 1 mes ago | 2

Answered
How do I convert a non-normal distribution to an equivalent normal distribution?
A few thoughts that might be useful, if not exactly a complete answer to your question ... First, I hope it is clear that not a...

alrededor de 1 mes ago | 2

Answered
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...

alrededor de 1 mes ago | 0

Answered
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...

alrededor de 1 mes ago | 0

Answered
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.

alrededor de 1 mes ago | 0

Answered
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;...

alrededor de 1 mes ago | 0

Answered
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 ...

alrededor de 1 mes ago | 1

Answered
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...

alrededor de 1 mes ago | 0

Answered
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...

alrededor de 1 mes ago | 0

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