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Jesse Crotts


Last seen: 4 years ago |  Active since 2016

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I study Mechanical Engineering and Applied Mathematics. One of my biggest interests is in Number Theory.

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Question


How do you know how many inputs your lsim function has?
I know this seems like a dumb question because you should know by your system size, but I can't seem seem to get my lsim functio...

6 years ago | 1 answer | 0

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answer

Question


What is Input for lsim?
When using the lsim function, the second variable to input is the "input" to the system. This seems very straightforward for a s...

6 years ago | 0 answers | 0

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answers

Question


Proper way to use exist function.
I am using the ode23 function to call another function. The problem is that I need to change the time value each time the functi...

6 years ago | 2 answers | 0

2

answers

Question


How to solve system of 2nd order differential equations using ode23 or ode45.
I'm trying to use ode23 or ode45 to solve a system of 2nd order differential equations that look like this: [M]*xdotdot+[K]*x=[...

6 years ago | 0 answers | 0

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answers

Question


How to assign a vector to multiple values.
I have these lines of code: function f = trick(t,x,M,K) f = zeros(4,1); f(1) = x(2); f(2) = x(3); Minvneg = -inv(M); [f(3)...

6 years ago | 0 answers | 0

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answers

Question


How to simulate using ode23 with multidimentional second order differential equations
!!!At the very bottom, there is a much simpler version of this question!!! I am trying to model a beam using FEM in Matlab. I u...

6 years ago | 2 answers | 0

2

answers

Answered
I have graduated and am in graduate school. My license needs to be renewed. How do I do that?
I guess I bought the perpetual one. However, I bought a new computer so I need to download MatLab on it. How do I go about doing...

6 years ago | 0

| accepted

Question


I have graduated and am in graduate school. My license needs to be renewed. How do I do that?
How do I renew my student license?

6 years ago | 1 answer | 0

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answer

Submitted


randloop
Creates a randomized loop around the origin.

7 years ago | 1 download |

Question


What does the Matlab student version have that the Matlab home version does not?
My MatLab student version will run out within the next year. I'm just wondering if I will have the same capabilities with the ho...

7 years ago | 1 answer | 0

1

answer

Submitted


Chaos_game_Numberphile
Fractal editor, inspired by Numberphile

7 years ago | 1 download |

Question


Whats wrong with my code?
All I wanna do is plot a user input function. What's wrong with this? I'm new to function handles. So any extra tips would be gr...

7 years ago | 1 answer | 0

1

answer

Submitted


Table Generator
This shows one of the most efficient ways to produce an function driven table.

7 years ago | 2 downloads |

Question


How do I make this 2 dimensional vector follow a formula
I want elements in a 2 dimensional vector two to follow a formula given its location (x,y) in the vector. For example, I want th...

8 years ago | 1 answer | 0

1

answer

Question


Does anyone recommend a solid state hard drive that will enhance MatLab's speed.
I use my computer mainly for Matlab, CAD, and gaming. Does anyone have a recommendation for a SSD that will enhance these 3 uses...

8 years ago | 1 answer | 0

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Question


I've been using a for loop with with mod functions to sieve number from the Natural numbers. Is there a more efficient sieve technique than this.
My Code looks something like this P = primes(100000); N = 1999900000:1:2000000000; for i = 1:numel(P); N(mod(N...

8 years ago | 1 answer | 0

1

answer

Submitted


Twins(n)
Gives a vector of twin primes up to "n"

8 years ago | 1 download |

Question


I wrote a code to produce twin primes, however it is pretty strenuous for my computer and I need some high numbers to check a conjecture. Is there a better way to get twin primes. Note: these twin primes are represented by 6m's where 6m+-1 are prime.
n = 1:120000; m61 = n*6-1; Twins = []; for i=1:numel(m61); z = isprime(m61(i)); y = isprime(m61(i)+2); if ...

8 years ago | 2 answers | 0

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