Community Profile # Steven

Active since 2011

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Question

Multiobjective genetic algorithm stopping criteria
Hi, I want to optimize an objective function which returns 3 values [y(1), y(2), y(3)] using gamultiobj toolbox. I set up the...

6 years ago | 1 answer | 0

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Question

Compare 2 vectors together
Hi, Let's say we have 2 vectors of different lenght, values (but there's not 2 values identical in the same vector) and not s...

9 years ago | 1 answer | 0

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Question

how to switch the value of a boolean.
Hi, is there any function to do the following : a = true; b = someFunction(a) ==> b = false b = sumeFuncti...

9 years ago | 2 answers | 0

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Solved

Select every other element of a vector
Write a function which returns every other element of the vector passed in. That is, it returns the all odd-numbered elements, s...

9 years ago

Solved

The Goldbach Conjecture
The <http://en.wikipedia.org/wiki/Goldbach's_conjecture Goldbach conjecture> asserts that every even integer greater than 2 can ...

9 years ago

Solved

Determine if input is odd
Given the input n, return true if n is odd or false if n is even.

9 years ago

Solved

Too mean-spirited
Find the mean of each consecutive pair of numbers in the input row vector. For example, x=[1 2 3] ----> y = [1.5 2.5] x=[1...

9 years ago

Solved

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...

9 years ago

Solved

Find the sum of all the numbers of the input vector
Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

9 years ago

Solved

Make a checkerboard matrix
Given an integer n, make an n-by-n matrix made up of alternating ones and zeros as shown below. The a(1,1) should be 1. Example...

9 years ago

Solved

Column Removal
Remove the nth column from input matrix A and return the resulting matrix in output B. So if A = [1 2 3; 4 5 6]; and ...

9 years ago

Solved

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...

9 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:...

9 years ago

PI Controller tuning
Any idea folks ?

9 years ago | 0

Question

PI Controller tuning
Hi, I have a second order Transfert Function that I would like to control with a PI. My problem is how to set the proportiona...

9 years ago | 2 answers | 0

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Question

manage time computing
Hi, I would like to manage the computing time of a function. For example : function y = myfun(x) y = something_long_t...

10 years ago | 1 answer | 0

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Question

how to organize your code in blocks
hi, I wonder if it's possible to regroup (minimize) some parts of your code. Matlab offers this with for loop, but could it be ...

10 years ago | 2 answers | 0

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the block I was looking for was index vector

10 years ago | 0

| accepted

Question

vectorization
hi, is there a quick way to change the values of the diagonal of a matrix, instead of for i = 1:length(A) A(i,i) = 0;...

10 years ago | 2 answers | 1

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Question

How to pick a value according to its probability
Hi, Let's say P = [0.1 0.3 0.4 0.2] X = [1 2 5 9] where P(n) is the probability to select the X(n) element. I wish...

10 years ago | 4 answers | 1

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Question

Easy question with probability
Hi, Let's say P = [0.1 0.3 0.4 0.2] X = [1 2 3 4] where P(n) is the probability to select the X(n) element. I wish...

10 years ago | 2 answers | 0

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Polynomial
f = @(x,y,z)(x+y+z); or f = inline('x+y+z', 'x', 'y', 'z'); or function f = myfun(x,y,z) f = x+y+z; return g...

10 years ago | 1

Heat transfer
Hi, You should take a look at MLE+. It's a toolbox wich make the connection between Matlab and EnergyPlus. Obviously, you need ...

10 years ago | 0

| accepted

Question

Hi, I'm looking for the right way to set a conditional statement in Simulink. That's the pseudo-code I wish to have: if ...

10 years ago | 2 answers | 0

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TeX (LaTeX math mode) symbols in legends and labels in MATLAB figures
Try with Latex interpreter, something like title(['\$ latex \$'],'interpreter','latex')

10 years ago | 0

for loop
value = 1:10; skip = [4 6 9]; value(skip) = []; for i = value ... end

10 years ago | 1

for loop
one way could be to specify manually the values: for i = [1 2 3 5 7 8 10] ... end

10 years ago | 1

Question

plot different color
Hi, Let's say I have x = 1:100; y = sin(x); I wish to plot it in blue but if y is superior at 0.5, I want that the plot chang...

10 years ago | 2 answers | 1

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Question

simple operations
Hi, I'm seeking the way to erase repeated value into vector, like this: a = [0 0 1 2 2 2 7]; b = something(a); b = [0 1 2...

10 years ago | 1 answer | 0