Seth DeLand

MathWorks

Last seen: 4 days ago | Active since 2011

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Knight's Tour Checker
Given a matrix a, determine whether or not a legal <http://en.wikipedia.org/wiki/Knight's_tour knight's tour> is present. The kn...

3 months ago

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Sums with Excluded Digits
Add all the integers from 1 to n in which the digit m does not appear. m will always be a single digit integer from 0 to 9. no...

3 months ago

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Which doors are open?
There are n doors in an alley. Initially they are all shut. You have been tasked to go down the alley n times, and open/shut the...

3 months ago

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Find the longest sequence of 1's in a binary sequence.
Given a string such as s = '011110010000000100010111' find the length of the longest string of consecutive 1's. In this examp...

1 year ago

Answered
Cannot Connect to Local Redis Instance: Invalid Host Name "localhost"
I encountered this same message, for me the problem was that my /etc/hosts file on MacOS had been modified when I did some work ...

2 years ago | 0

Submitted

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

3 years ago | 3 downloads |

Submitted

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

3 years ago | 11 downloads |

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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...

7 years ago

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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...

7 years ago

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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...

7 years ago

Submitted

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

8 years ago | 2 downloads |

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.

8 years ago | 2 downloads |

Submitted

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

8 years ago | 104 downloads |

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

8 years ago

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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...

9 years ago

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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...

9 years ago

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

9 years ago

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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:...

9 years ago

Answered
Optimizing FLC with GA
Hi Michael, Here's an <http://www.mathworks.com/help/gads/examples/coding-and-minimizing-a-fitness-function-using-the-genetic...

10 years ago | 0

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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 ...

10 years ago

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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...

11 years ago

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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...

11 years ago | 0

Answered
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...

11 years ago | 0

| accepted

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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 <...

11 years ago | 3

Answered
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...

11 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...

11 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]

11 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.

11 years ago

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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...

11 years ago

Answered
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...

11 years ago | 0

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Seth DeLand

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