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Binbin Qi


China University of Petroleum

Last seen: 3 dagen ago Active since 2009

Professional Interests: Machine Learning/ Math/ Geophysics

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  • Cody 5th Anniversary Finisher
  • Triathlon Participant
  • Knowledgeable Level 2
  • Thankful Level 1
  • Divisible by x Master
  • Logic
  • Personal Best Downloads Level 1
  • First Review
  • Computational Geometry I Master
  • Matrix Patterns II Master
  • Introduction to MATLAB Master
  • Community Group Solver

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Answered
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...

7 dagen ago | 0

Answered
Finding the number of rows to the next row containing a 1
A = [0 0 0 1 0 1 1 1 0 0 0 0 0 1]'; C = find(A); D = (1:length(A)) - C; D(D>0) = D(D>0) + inf'; min(abs(D))' ans = ...

meer dan een jaar ago | 2

Answered
Create Incidence matrix from Graph theory?
ok >> G=digraph( [ 1 2 2 2 3 4] , [4 1 3 4 1 3]); >> I = full(incidence(G)) I = -1 1 0 0 1 0 ...

meer dan een jaar ago | 1

| accepted

Answered
Create Incidence matrix from Graph theory?
>> G=digraph( [ 1 2 2 2 3 4] , [4 1 3 4 1 3]); >> full(G.adjacency) ans = 0 0 0 1 1 0 1 ...

meer dan een jaar ago | 0

Answered
Change date format in vector
t1 = datetime("4/1/2019 12:45:00 AM",'InputFormat',"dd/MM/yyyy HH:mm:ss a"); t2 = datetime("15/6/19 18:10",'InputFormat',"dd/M...

meer dan een jaar ago | 0

| accepted

Answered
For loop and if else statements with multiple conditions
clear;clc;close all [m, n] = deal(4, 8); matrix_data = rand(m, n); num = ['1st','2nd','3rd', sprintfc('%dth', 4:8)]; for i =...

meer dan een jaar ago | 1

| accepted

Answered
How to get specific values from matrix in column 1, based on values in other columns?
clear;clc;close all load sub-01_T2_planktimes R = accumarray(sub01T2(:,2:3)+1,sub01T2(:,1),[], @(x){x}); R{2,2} ans = ...

meer dan een jaar ago | 0

Answered
Histogram Only Plotting 1 Point
I think you can use bar, not histogram bar(error)

meer dan een jaar ago | 0

Answered
Dialog UI and sprintf creating unnecessary new lines
The following is my code. It is can work normally. Can you give your code here? function mydialog(line1,line2,line3) if narg...

meer dan een jaar ago | 0

Answered
How to genneral a repeat array
You can use repelem function to accomplish your question a = 1 2 3 4 >> repelem(a, 3) ...

ongeveer 5 jaar ago | 0

| accepted

Answered
How do I convert my .mlapp file into a .exe file?
you can get the main file and use deploytool command

ongeveer 5 jaar ago | 0

Answered
change font size of subplot text
I use the following code, it can work clear;clc;close all subplot(335); fplot(@sin,[-1,1]); tx = text(.5,.5,'y = s...

meer dan 5 jaar ago | 0

Answered
Area between two curves
if you can get the points of every curve, you can use *polyarea* function to get the area, and then diff

meer dan 6 jaar ago | 0

Answered
why slow 5 times when tic or toc and expression in one line?
Thank you, I guess the reason is JIT.Now, I confirmed

meer dan 6 jaar ago | 0

Question


why slow 5 times when tic or toc and expression in one line?
when tic or toc and the main expression are in one line, it will be slow *5 times* than not in a line *1: tic or toc and the ...

meer dan 6 jaar ago | 2 answers | 0

2

answers

Question


How to get the same rand
recently,I do cody games,and I am in trouble about the problem 207:hackathon impossible the link is: http://www.mathworks.cn/ma...

meer dan 9 jaar ago | 1 answer | 0

1

answer