# Michael Vaughan

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Question

Writing a recursive matlab code that can perform column-oriented substitution

I'm trying to write a code that can perform forward substitution for the equation Ax=b where A is a lower triangular matrix and ...

9 months ago | 1 answer | 0

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answerQuestion

If I have an nxn matrix, how do I compute it's j'th principal minor using matlab?

If I have an nxn matrix, how do I compute it's j'th principal minor using matlab? the j'th principal minor is the jxj matrix ...

1 year ago | 1 answer | 0

### 1

answerQuestion

Why is my code not working?

I want the following script to calculate: $$J_{(2,k)}(N)=\frac{1}{s-s^{-1}}{\sum_{j=\frac{-(N-1)}{2}}^{\frac{(N-1)}{2}}(s^{4j...

1 year ago | 1 answer | 0

### 1

answerQuestion

Trying to write a script to calculate a sum

Can somebody show me how to write a script to calculate the following function of N? It just confuses me a bit because if is an...

1 year ago | 1 answer | 0

### 1

answerQuestion

expanding a given function as a power series?

say I have a function, for example f(x)=x^3+2x. I want to know how take an arbitrary function like this, and for each value sup...

1 year ago | 1 answer | 0

### 1

answerQuestion

Need help programming a few tricky calculations!!

Can somebody show me how to write a program to calculate a program that you input and N and the output is: thank you edit:...

1 year ago | 1 answer | 0

### 1

answerQuestion

evaluate symbolic expression... can't figure out!!

so I have declared syms v t then I have defind this very long expression rw11 to be: rw11= -(t^(2 - 2*k)*v^(k - 2)*(t - ...

1 year ago | 1 answer | 0

### 1

answerQuestion

Code is not working, can someone help me?

So I have successfully written scripts for three different functions of 3 variables, Sum1(x,y,z) Sum2(x,y,z) and Sum3(x,y,z) I ...

1 year ago | 1 answer | 0

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answerQuestion

Why is this code not working whilst the other is?

I have written this script: function sum = Sum2(x,y,z) s = 0; for i=0:min(x,y) for k=0:y-i s = s + (-1)^k *...

1 year ago | 1 answer | 0

### 1

answerQuestion

Trying to code a tricky double summation

So I'm trying to write code that calculates the following: I have two functions of the same two variables, call them D(x,y) a...

1 year ago | 1 answer | 0

### 1

answerQuestion

Trying to code a tricky double summation

So I'm trying to write code that calculates the following: I have two functions of the same two variables, call them D(x,y) a...

1 year ago | 0 answers | 0

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answersQuestion

Multiple functions working together?

here is my code in a script coding window: function [n] = n(x) syms q [n]=(q^(x/2)-q^(-x/2))/(q^(1/2)-q^(-1/2)); end func...

1 year ago | 2 answers | 0

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answersQuestion

Help calling my basic function

So I wrote the following in a script coding window: function [n] = n(x) syms q [n]=(q^(x/2)-q^(-x/2))/(q^(1/2)-q^(-1/2)); ...

1 year ago | 2 answers | 0

### 2

answersQuestion

Help creating a basic function

So I already created the following script: function [n] = n(x) syms q [n]=(q^(x/2)-q^(-x/2))/(q^(1/2)-q^(-1/2)) end Whi...

1 year ago | 1 answer | 0

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answerQuestion

Why is my function not working?

I wrote this in a coding window: function z = z(x) z = (v^(x/2)-v^(-x/2))/(t^(x/2)-t^(-x/2)); end then I saved it, went to...

1 year ago | 2 answers | 0

### 2

answersQuestion

Getting a function I downloaded online to run

Hey guys, I'm extremly new to programming, so be patient with me! I downloaded this script: https://www.mathworks.com/matlabc...

1 year ago | 1 answer | 0

### 1

answerQuestion

Indexing the output of the function nsumk

Hey guys, I'm really new to programming. I just figured out how to add a path and get the program nsumk working. When I type...

1 year ago | 1 answer | 0

### 1

answerQuestion

How do I run a function I downloaded?

So I downloaded this script nsumk to do some cool partition of integers for me: https://www.mathworks.com/matlabcentral/fileexch...

1 year ago | 1 answer | 0

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answerQuestion

Simplifying a matematical expression

I have this following beastly expression typed up very nicely in LaTeX formatting, as you can see. Is there anyway that I can en...

1 year ago | 1 answer | 0