the cyclist

Alden Scientific

Last seen: 2 jours il y a | Actif depuis 2011

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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
Pronouns:
He/him

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Réponse apportée
Shapley based feature selection
The Shapley values don't require the class labels (i.e. the actual responses) to determine feature importance. The Shapley valu...

4 jours il y a | 1

| A accepté

A résolu

Project Euler: Problem 4, Palindromic numbers
A palindromic number reads the same both ways. The largest palindrome made from the product of two 2-digit numbers is 9009 = 91 ...

7 jours il y a

A résolu

Project Euler: Problem 3, Largest prime factor
The prime factors of 13195 are 5, 7, 13 and 29. What is the largest prime factor of the number being input, input might be ui...

7 jours il y a

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Solve a System of Linear Equations
Example: If a system of linear equations in x₁ and x₂ is: 2x₁ + x₂ = 2 x₁ - 4 x₂ = 3 Then the coefficient matrix (A) is: 2 ...

7 jours il y a

A résolu

Verify Law of Large Numbers
If a large number of fair N-sided dice are rolled, the average of the simulated rolls is likely to be close to the mean of 1,2,....

7 jours il y a

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Word Counting and Indexing
You are given a list of strings, each being a list of words divided by spaces. Break the strings into words, then return a maste...

7 jours il y a

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Magic is simple (for beginners)
Determine for a magic square of order n, the magic sum m. For example m=15 for a magic square of order 3.

7 jours il y a

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Rotate Matrix @180 degree
Rotate Matrix @180 degree Example A=[8 1 6; 3 5 7; 4 9 2], then answer would be [2 9 4;...

7 jours il y a

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Converts numbers into characters
Converts numbers into characters

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Find the max element of the array
Find the max element of the array

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Square root
Given x (a matrix), give back another matrix, where all the elements are the square roots of x's elements.

7 jours il y a

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Calculate the average value of the elements in the array
Calculate the average value of the elements in the array

7 jours il y a

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to the 2 all elements
to the 2 all elements

7 jours il y a

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the average value of the elements
Calculate the average value of the elements in the array

7 jours il y a

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Double all elements in the array
Duplicate all elements in the array

7 jours il y a

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calculate the length of matrix
input 1 array, calculate the length

7 jours il y a

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Draw a '0' in a one matrix!

7 jours il y a

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Length of the hypotenuse
Given short sides of lengths a and b, calculate the length c of the hypotenuse of the right-angled triangle. <<https://i.imgu...

10 jours il y a

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Maximum value in a matrix
Find the maximum value in the given matrix. For example, if A = [1 2 3; 4 7 8; 0 9 1]; then the answer is 9.

10 jours il y a

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Return area of square
Side of square=input=a Area=output=b

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Convert from Fahrenheit to Celsius
Given an input vector F containing temperature values in Fahrenheit, return an output vector C that contains the values in Celsi...

10 jours il y a

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Calculate Amount of Cake Frosting
Given two input variables r and h, which stand for the radius and height of a cake, calculate the surface area of the cake you n...

10 jours il y a

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Find the Oldest Person in a Room
Given two input vectors: * |name| - user last names * |age| - corresponding age of the person Return the name of the ol...

10 jours il y a

Réponse apportée
Preserving More Decimal Places When Importing Excel Files with readtable in MATLAB
All decimal places are retained for me ... % Change the format format long % Read the file r = readtable("Lab.xlsx"); % H...

environ 2 mois il y a | 0

Réponse apportée
How to get MPE (Mean Percentage Error) with plsregress
The documentation doesn't seem to indicate any way to change the metric that is optimized. (This is unsurprising to me.) I can ...

2 mois il y a | 0

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Réponse apportée
Why is bootci giving different interval than prctile?
Because your prctile calculation should be ci = prctile(bootstat, [(alpha/2)*100,(1-(alpha/2))*100]);

3 mois il y a | 1

Réponse apportée
Tiling stacks of boxplots. Each stack contains 5 boxplots
Would subplot(2,5,1) ... subplot(2,5,10) do what you want? Also, I would highly recommend using tiledlayout over subplot. It ta...

3 mois il y a | 0

Réponse apportée
how to apply PCA over 6000x82 data
Take a look at this answer of mine which is effectively a tutorial on the MATLAB pca function.

3 mois il y a | 1

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Why is pagemtimes slower than just coding up the matrix multiplication?Especially on GPU.
It seems to me that the two functions are not calculating the same thing, based on the size of their respective outputs: rng ...

4 mois il y a | 1

Réponse apportée
SVM Fitcsvm() thresholds vs ROC curve thresholds
fitcsvm() fits the best possible SVM to the data. That function itself does not make the predictions. The resulting model objec...

4 mois il y a | 0

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