Chris Hooper

Last seen: 7ヶ月前 | 2016 年からアクティブ

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質問

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...

9ヶ月前 | 2 件の回答 | 0

2

回答

解決済み

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...

1年以上前

質問

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. ...

1年以上前 | 2 件の回答 | 0

2

回答

Discussion

uniqueN function would be useful
isequaln exists to return true when NaN==NaN. unique treats NaN==NaN as false (as it should) requiring NaN to be replaced if Na...

1年以上前 | 5

質問

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...

2年弱前 | 1 件の回答 | 0

1

回答

質問

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...

3年以上前 | 1 件の回答 | 0

1

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送信済み

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

4年以上前 | ダウンロード 1 件 |

0.0 / 5

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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...

6年以上前 | 0

質問

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...

約7年前 | 2 件の回答 | 0

2

回答

解決済み

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...

9年弱前

解決済み

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.

9年弱前

解決済み

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

9年弱前

解決済み

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...

9年弱前

送信済み

mdof
time domain system multiple dof spring mass damper force

9年以上前 | ダウンロード 1 件 |

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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 ...

10年弱前 | 0