Binbin Qi

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China University of Petroleum

4 845 total contributions since 2009

Professional Interests: Machine Learning/ Math/ Geophysics

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Solved

Matrix convolution
A certain convolution step involves an elementwise multipication between two 3x3 matrices and taking the resulting sum of the el...

42 minutes ago

Solved

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...

4 jours ago

Solved

Create initial basic feasible solution for transportation problems -Minimum Cost Method

5 jours ago

Solved

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...

14 jours ago

Solved

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.

14 jours ago

Solved

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

14 jours ago

Solved

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.

14 jours ago

Solved

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...

14 jours ago

Solved

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...

14 jours ago

Solved

Function - Cylinder Surface Area
The goal

16 jours ago

Solved

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.

16 jours ago

Solved

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

23 jours ago

Solved

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...

24 jours ago

Solved

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...

26 jours ago

Solved

Sales Tax

26 jours ago

Solved

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...

26 jours ago

Solved

Compute the nth term from the golden sieve

environ un mois ago

Solved

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...

environ un mois ago

Solved

List the titles of Cody problems

environ un mois ago

Solved

Make a Number From the First and Last Digit of an Input Number

environ un mois ago

Solved

Make the first letter of a sentence Capital.

environ un mois ago

Solved

Write a function to generate AND operation