# Binbin Qi

### China University of Petroleum

Professional Interests: Machine Learning/ Math/ Geophysics

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Plotting Practice

Plot cos(x) vs x as shown in the figure below. Include the appropriate title, x-label, and y-label. Note, it is case sensitive. ...

12 days ago

Equivalent of c++'s NULL or python' s None in MATLAB

I think you can use class.empty for null in matlab classdef A < handle properties empty = A.empty; end end...

14 days ago | 0

Solved

Divisible by n, prime divisors (including powers)

For this problem, you will be provided an array of numbers (not necessarily in order). Return the array of numbers with only pri...

1 month ago

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Functionality 1

It's all about functionality. *Cheating is allowed but not required*

2 months ago

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Generate a matrix as follows

write a Function that gives like the following for a random n: n=2 ans= [ 0 1 1 0] n=6 ans= [ 0 ...

2 months ago

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Sort Except Zeros

Sort the numbers in a vector. But the position of zeros should not be changed. Example: sort_except_zeros( [5 3 0 0 2 4] ) == [...

4 months ago

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UICBioE240 problem 1.11

Store a series of numbers into a 4 by 4 matrix, starting with the first few positions going right and down, and leaving the rest...

4 months ago

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MATLAB Basics: Complex Conjugates

For a given complex number, x, return the complex conjugate, y.

5 months ago

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MATLAB Basics: Complex Argument

For a given complex number, x, return the argument, y, in degrees.

5 months ago

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MATLAB Basics: Complex Numbers

For a given complex number, x, return the real and imaginary parts as a vector, y = [Real Imaginary].

5 months ago

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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...

6 months ago

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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...

6 months ago

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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...

6 months ago

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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.

6 months ago

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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.

6 months ago

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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.

6 months ago

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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...

6 months ago

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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...

6 months ago

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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.

6 months ago

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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...

6 months 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...

6 months 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...

6 months ago