Chris Hooper

Last seen: 6 mesi fa | Attivo dal 2016

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Domanda

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 mesi fa | 2 risposte | 0

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risposte

Risolto

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...

oltre un anno fa

Domanda

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. ...

oltre un anno fa | 2 risposte | 0

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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...

oltre un anno fa | 5

Domanda

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...

quasi 2 anni fa | 1 risposta | 0

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risposta

Domanda

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...

oltre 3 anni fa | 1 risposta | 0

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Inviato

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

oltre 4 anni fa | 1 download |

0.0 / 5

Risposto
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...

oltre 6 anni fa | 0

Domanda

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...

circa 7 anni fa | 2 risposte | 0

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Risolto

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...

quasi 9 anni fa

Risolto

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.

quasi 9 anni fa

Risolto

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

quasi 9 anni fa

Risolto

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...

quasi 9 anni fa

Inviato

mdof
time domain system multiple dof spring mass damper force

oltre 9 anni fa | 1 download |

0.0 / 5

Risposto
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 ...

quasi 10 anni fa | 0