Chris Hooper

Last seen: 2 dagar ago | Active since 2016

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Question

how to deal with discontinuities in solutions to differential equations using ode45
Motivation: I am trying to learn how to use ode45 for fun after studying some math (because it seems engineering eventually make...

6 dagar ago | 2 answers | 0

2

answers

Solved

Given the mass and stiffness of an undamped SDOF system, find the natural frequency and the natural period of vibration
Problem Statement Given the mass and stiffness of an undamped SDOF system, find the system's natural frequency in both Hz and...

7 månader ago

Question

How do I reduce categorical array containing alternate spellings and formats?
I bet this problem comes up all the time: I have a categorical array of length ~ 10,000 and typical string length ~ 10 to 20. ...

7 månader ago | 2 answers | 0

2

answers

Question

Is it possible to zip files one directory up with "zip"
This creates file1.zip containing file2 and file3: zip('file1',{'file2','file3'}) However, this creates file1.zip containing n...

ungefär ett år ago | 1 answer | 0

1

answer

Question

datenum(year,month,day,hr) that returns integer
I need a datenum(year,month,day,hr) that returns an integer, where year, month, day, and hr are vectors of integers. motivation...

nästan 3 år ago | 1 answer | 0

1

answer

Submitted

Matlab and Excel: read and write
read and write data between matlab and excel

mer än 3 år ago | 1 download |

0.0 / 5

Answered
Excel custom properties Add function - Invoke Error: Incorrect number of arguments
I am very interested in this as well. I am trying to use optional arguments for the Range.Find() method in order to specify tha...

nästan 6 år ago | 0

Question

interesting matrix indexing question without for loops
size(matrixA)=[b,n,m] size(matrixB)=[n,m] how can I create matrixC(i,j)=matrixA(matrixB(i,j),i,j) without using...

mer än 6 år ago | 2 answers | 0

2

answers

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Triangle Numbers
Triangle numbers are the sums of successive integers. So 6 is a triangle number because 6 = 1 + 2 + 3 which can be displa...

ungefär 8 år ago

Solved

Sum all integers from 1 to 2^n
Given the number x, y must be the summation of all integers from 1 to 2^x. For instance if x=2 then y must be 1+2+3+4=10.

ungefär 8 år ago

Solved

Add two numbers
Given a and b, return the sum a+b in c.

ungefär 8 år ago

Solved

Make the vector [1 2 3 4 5 6 7 8 9 10]
In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...

ungefär 8 år ago

Submitted

mdof
time domain system multiple dof spring mass damper force

mer än 8 år ago | 2 downloads |

0.0 / 5

Answered
64 Bit version of Matlab 2015a a lot slower than 32bit version
Did you try running the benchmarks multiple alternating times to avoid the order effect? running a matlab code is often slowest ...

ungefär 9 år ago | 0