Binbin Qi
China University of Petroleum
Professional Interests: Machine Learning/ Math/ Geophysics
Statistics
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2 Questions
14 Answers
ANSWER ACCEPTANCE
50.0%
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REPUTATION
310
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3.70
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Completed both Cody 5th anniversary groups
Awarded to Binbin Qi on 23 Dec 2017
15-year anniversary Triathlon participant badge
Awarded to Binbin Qi on 09 Nov 2016
3 of your answers have been accepted
Awarded to Binbin Qi on 20 Aug 2020
Accept 1 answer given by other contributors
Awarded to Binbin Qi on 20 Jul 2017
Solve all the problems in Divisible by x
Awarded to Binbin Qi on 01 Nov 2021
Solve all the problems in Logic problem group
Awarded to Binbin Qi on 13 Apr 2020
Your submissions were downloaded 10 or more times in a month
Awarded to Binbin Qi on 01 Nov 2019
Publish your first review
Awarded to Binbin Qi on 09 Oct 2019
Solve all the problems in Computation Geometry I
Awarded to Binbin Qi on 29 Mar 2020
Solve all the problems in Matrix Patterns II
Awarded to Binbin Qi on 14 Dec 2019
Solve all the problems in Introduction to MATLAB problem group
Awarded to Binbin Qi on 14 Dec 2019
Receive 25 likes on a problem you have created
Awarded to Binbin Qi on 17 Oct 2019
Content Feed
Solved
Draw 'P' !!!
Draw a n by n matrix 'P' using 0s and 1s. (n is odd and greater than 4) if n=5 , then the output will be [1 1 1 1 1 1 0 0 0...
4 months ago
Solved
Find the summation, mean, median, mode and standard deviation of a given array.
An array is given. Find out the summation, mean, median, mode and standard deviation of a given array. If x=[1,2,2,3,3,3,4,4,4,...
4 months ago
Solved
Sum of two number using (regexp, varargin) comand?
Sum two number a &b and get there result in c using the rexp and varargin comand.
4 months ago
Solved
Draw matrix 'Swiss flag'( Euro 2020)
Draw a x-by-x matrix 'Swiss flag' using '0' and '1'.(x is odd and bigger than 4) Example x=5 ...
4 months ago
Solved
Easy Sequences 5: Project Euler Problem 1 - Again!
We are all familiar with Project Euler Problem 1. This time let's try it on bigger multiples and larger range. Find the sum of ...
4 months ago
Solved
Easy Sequences 4: Eliminate the Days of Confusion
If a date is written in purely numeric format some dates can be confusing, if we don't know the date format used. For example, "...
4 months ago
Solved
Easy Sequences 3: Prime 44-number Squares
The positive integers 62 and 238 are related. Their squares (3844 and 56,644) both end in '44'. In fact, 62 and 238 are the 3rd ...
4 months ago
Solved
Easy Sequences 2: Trigonometric function with integral input and output
The function 'F', defined as: , will always return an integer if the input is a natural number (in radian...
4 months ago
Solved
Easy Sequences 1: Find the index of an element
The nth element of a series is defined by: . Obviously, the first element . Given the nth element , find the value of the corre...
4 months ago
Solved
Total resistance of resistors in parallel
What is the total resistance of a number of resistors in parallel? A vector R contains the resistances (in Ohm) of n resistors,...
4 months ago
Solved
Total resistance of resistors in series
What is the total resistance of a number of resistors in series? A vector R contains the resistances (in Ohm) of n resistors, w...
4 months ago
Solved
UICBioE240 problem 1.12
The mathematical quantities e^x, ln x, and log x are calculated in Matlab using the expressions exp(x), log(x), and log10(x), re...
4 months ago
Solved
Leftovers? Again?!
I am thinking of a positive number X. To determine what number I am thinking of, I will give you two 1xN vectors. The first ve...
4 months ago
Solved
Find the largest number
Find the largest number |x| among 4 numbers given as variables |a|, |b|, |c|, and |d|. Example: Input: a = 4; b = 7; c ...
4 months ago
Solved
make histogram
You probably know the function hist(x,n) to get the histogram. Now try to write the function yourself! For the cheaters wanting...
4 months ago
Solved
A little bit of luck needed
This one may require a little bit of guess work, but it is possible. Hints: - The same solution might fail the tests once and ...
4 months ago
Solved
ICFP2021 Hole-In-Wall: Calculate Score
The ICFP held its annual 3-day contest in July 2021 with Hole-In-Wall. Contest Specification. The contest folds the figure in R...
4 months ago
Solved
Which Prime
Given two prime numbers, specify the relation between them i.e. - 'Twin Prime', 'Cousin Prime', 'Sexy Prime' or 'None'
4 months ago
Solved
Create array of all Distances between two Sets of Points
This Challenge is a subsection of Martian Pranks based on Tim's efficient Distance calculation between sets of points. Given Po...
4 months ago
Solved
Sum the rows
Sum the rows of the given matrix. Example x = [ 1 2 3 4 ] y = [ 3 7 ]
5 months ago
Solved
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. ...
6 months 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...
6 months 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...
7 months ago
