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# 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...

7 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...

10 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...

10 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...

10 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 ...

10 years ago

Solved

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

10 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...

10 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...

10 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 ...

10 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...

10 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 ...

10 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...

10 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:...

10 years ago

PI Controller tuning
Any idea folks ?

10 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...

10 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...

11 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 ...

11 years ago | 2 answers | 0

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the block I was looking for was index vector

11 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;...

11 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...

11 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...

11 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...

11 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 ...

11 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 ...

11 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')

11 years ago | 0

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

11 years ago | 1

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

11 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...

11 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...

11 years ago | 1 answer | 0