Binbin Qi

China University of Petroleum

Last seen: ungefär en månad ago | Active since 2009

Followers: 2 Following: 0

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Professional Interests: Machine Learning/ Math/ Geophysics

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18 Problems
5228 Solutions

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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...

mer än 3 år 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 = ...

mer än 4 år 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 ...

mer än 4 år 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 ...

mer än 4 år 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...

mer än 4 år 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 =...

mer än 4 år 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 = ...

mer än 4 år ago | 0

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

mer än 4 år 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...

mer än 4 år 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) ...

mer än 8 år 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

mer än 8 år 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...

nästan 9 år 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

nästan 10 år 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

ungefär 10 år 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 ...

ungefär 10 år 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...

nästan 13 år ago | 1 answer | 0

1

answer