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# Seth DeLand

### MathWorks

81 total contributions since 2011

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Solved

5th Time's a Charm
Write a function that will return the input value. However, your function must fail the first four times, only functioning prope...

9 months ago

Solved

Ned's Queens
A tribute to Cody's five-year anniversary should also celebrate the people behind Cody, and in this particular case, our illustr...

9 months ago

Solved

The 5th Root
Write a function to find the 5th root of a number. It sounds easy, but the typical functions are not allowed (see the test su...

9 months ago

Submitted

Optimization in MATLAB: An Introduction to Quadratic Programming
Files used in "An Introduction to Quadratic Programming" Webinar

Submitted

Analyzing Fleet Test Data using MATLAB
Files from the webinar "Analyzing Fleet Test Data using MATLAB"

Submitted

Mixed-Integer Linear Programming in MATLAB
MATLAB files from the webinar

Submitted

Files for the 2012 Webinar "Tips and Tricks - Getting Started Using Optimization with MATLAB"
These are the files that were used for the demonstrations in the webinar.

Submitted

CVaR Portfolio Optimization
Conditional Value at Risk (CVaR) portfolio optimization with the PortfolioCVaR object

Submitted

Optimal Component Selection Using the Mixed-Integer Genetic Algorithm
Use the mixed-integer genetic algorithm to solve an engineering design problem.

Solved

Pizza!
Given a circular pizza with radius _z_ and thickness _a_, return the pizza's volume. [ _z_ is first input argument.] Non-scor...

2 years ago

Channel

MyActivity
Recorded data from Human Activity app running on phone

2 years ago

Solved

Model a mass spring system
Model an ideal mass-spring system shown below where the spring is initially stretched. <<http://blogs.mathworks.com/images/se...

2 years ago

Solved

Make a half wave rectifier
Produce a signal that outputs the given sine wave source when it is greater than zero and outputs zero when it is less than zero...

2 years ago

Solved

Produce a cosine wave
Produce the following signal: <<http://blogs.mathworks.com/images/seth/cody/cosine-eqn.png>>

2 years ago

Solved

Times 2 - START HERE
Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

2 years ago

Integer Programming
Solve linear programming problems with integer variables.

4 years ago | 61 clicks |

Optimizing FLC with GA

4 years ago | 0

Solved

Text processing - Help Johnny write a letter home from camp
Johnny overuses the word 'great'. Write a script that will help him with this and future letters. If a sentence contains more ...

4 years ago

Solved

Set the array elements whose value is 13 to 0
Input A either an array or a vector (which can be empty) Output B will be the same size as A . All elements of A equal to 13...

4 years ago

how can i solved mixed integer linear programming using genetic algorithm in matlab
If your objective function and constraints are linear, I highly recommend using the mixed-integer linear programming solver in O...

4 years ago | 0

how to implement MILP in matlab
As of R2014a, Optimization Toolbox has a mixed-integer linear programming solver: <http://www.mathworks.com/help/optim/ug/intli...

4 years ago | 0

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Numerical packing
Seeing how Optimization Toolbox has a mixed-integer solver in R2014a, I figured I would post this alternate solution that uses <...

4 years ago | 3

simultaneous linear equations minimization by linprog command
The summation of the variables being equal to a constant could be taken care of by an equality constraint. In that case, your A...

4 years ago | 0

Solved

How to find the position of an element in a vector without using the find function
Write a function posX=findPosition(x,y) where x is a vector and y is the number that you are searching for. Examples: fin...

4 years ago

Solved

Reverse the vector
Reverse the vector elements. Example: Input x = [1,2,3,4,5,6,7,8,9] Output y = [9,8,7,6,5,4,3,2,1]

4 years 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.

4 years ago

Solved

Most nonzero elements in row
Given the matrix a, return the index r of the row with the most nonzero elements. Assume there will always be exactly one row th...

4 years ago

I'm trying to write a bit of user friendly code where the user is prompted to enter file names and the names will be stored in an array. However, I keep getting errors. Can someone fix this code below?
Two things that I think will help: 1) Use a cell array to store the names of the files rather than an array. This will be ea...

5 years ago | 0

| accepted

How do I find all the positive roots of (e^(-.2x ))(cos(2x))-.15x^2+1
2 things: 1) fzero is designed to find a single zero at a time. You will need to loop through each value for x0 and record the ...

5 years ago | 0