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Binbin Qi


Last seen: 1日 前

China University of Petroleum

4,845 2009 年以降の合計貢献数

Professional Interests: Machine Learning/ Math/ Geophysics

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Binbin Qi's バッジ

  • Cody 5th Anniversary Finisher
  • Triathlon Participant
  • Scavenger Finisher
  • Knowledgeable Level 2
  • Thankful Level 1
  • First Answer
  • Logic
  • Computational Geometry I Master
  • Matrix Patterns II Master
  • Personal Best Downloads Level 1
  • First Review
  • 5-Star Galaxy Level 1
  • Introduction to MATLAB Master
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Matrix convolution
A certain convolution step involves an elementwise multipication between two 3x3 matrices and taking the resulting sum of the el...

1日 前

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Matrix Indexing
Given a matrix A and scalars r,c,i, find the product of two elements, with the first element located at row r and column c (doub...

5日 前

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Stacking vectors into a matrix
Given a 4x1 vector a, and a 2x2 matrix b, create a matrix M in which the first 2 rows are each identical to a and the last two r...

15日 前

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Vector creation using colon operator
Create a vector y containing n uniformly spaced values between a and b, with a < b. Use the colon (:) operator.

15日 前

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Vector creation using linspace
Create a vector y containing n uniformly spaced values between a and b, with a < b. Use linspace.

15日 前

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Logarithmically spaced vector creation using logspace
Create a vector y containing n logarithmically spaced values between a and b, with a < b. Use the logspace operator.

15日 前

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Logarithmically spaced vector creation using linspace
Create a vector y containing n logarithmically spaced values between a and b, with a < b. Avoid using logspace and use the linsp...

15日 前

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Right shift an array n times with constant space.
Right shift an array n times with constant space, that is, no extra array can be used. Right shift operation: Last element com...

15日 前

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Function - Cylinder Surface Area
The goal

17日 前

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Find the number of days in a given year
Given a year number (eg. 2000) as input, find how many days are there in the given year.

17日 前

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Find the sum of the following series
A(n)=(n*(n-1)!)/(n-2)!

24日 前

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Count unique orderings of vertices of a polygon
Cody Problem 2671 asks us to determine whether four points can be the corners of a rectangle. The points are not necessarily inp...

25日 前

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Create the flag of Ramumbia
The little known nation of Ramumbia has a very simple flag. It is made up of vertical stripes, Red, Green, Blue, that are equall...

28日 前

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Sales Tax

28日 前

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Sum the Infinite Series II
For any x in the range 0 < x and x < 2*pi radians, find the sum of the following infinite series: c = 1 + 1/2*cos(x) + 1/2*3...

28日 前

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Compute the nth term from the golden sieve

約1ヶ月 前

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Count alternating permutations
In an alternating permutation of numbers 1 to n, the numbers are arranged so that they alternately increase and decrease. For ex...

約1ヶ月 前

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List the titles of Cody problems

約1ヶ月 前

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Write a function to generate AND operation

約1ヶ月 前

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Solve an ODE: equation A

約1ヶ月 前

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Flip coins

約1ヶ月 前

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Iterate the sum of divisors and totient

約1ヶ月 前

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Logic 11

約2ヶ月 前

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Find an inscribed square on a closed curve

約2ヶ月 前

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Convert any case sentence to Title Case

約2ヶ月 前

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Similar triangles

約2ヶ月 前

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