# genevois pierre

### Grenoble-INP

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Question

computing a sequence of vectors

the sequence is defined, for i = 1:n, by this vectorial recurrence relation : [A(i+1); B(i+1)] = Q * [A(i); B(i)] + [C; D] wit...

3 years ago | 1 answer | 0

### 1

answerQuestion

how to stop executing a function if its duration is too long ?

Hi, the solve function (applied to a hard problem) still executes after a 30 minutes run ... Can it be stopped by the calling pr...

3 years ago | 1 answer | 0

### 1

answerusing symbolic calculus on char strings (coming from a file)

Thank you for your answer ; a warning when using str2sym could mean that this function will be removed in a future version ? How...

5 years ago | 0

| accepted

Question

using symbolic calculus on char strings (coming from a file)

Hello, I'm currently using str2sym on char strings obtained from fgetl on a text file containing many lines of mathematical expr...

5 years ago | 1 answer | 0

### 1

answerQuestion

behavior of for loop with strings of chars ?

Hi, this for statement for string = ['=A=', '=B=', '=C='] [starts, ends] = regexp(line, string); the ...

5 years ago | 1 answer | 0

### 1

answerQuestion

how to replace 'x\d+' by 'X(...same number as \d+ ...)' such as x45 --> X(45) using regexprep ?

Hello, I'm searching for replacing, in a text file, strings having 'x' as only non numeric character at the beginning, followed...

5 years ago | 1 answer | 0

### 1

answerQuestion

accessing to some ga's parameters

Hi, I cannot access to some values of parameters of ga as (names = values hereafter) : options_ga.FitnessScalingFcn = @fitsc...

6 years ago | 0 answers | 0

### 0

answersQuestion

how to count the number of function calls without modifying it by inserting a counter ?

Hi, for example in ga(...), the count of objective function calls is provided, but not that of the constraint function. My unsat...

6 years ago | 2 answers | 0

### 2

answersQuestion

a test to exclude inf and nans from pinv(...) doesn't work

Hello, having this error : Error using svd Input to SVD must not contain NaN or Inf. Error in pinv (li...

6 years ago | 1 answer | 0

### 1

answerconstrained pso : how to set initial population ?

I get the same problem ... probably due to the call to fmincon in psocheckinitialpopulation, line 99.

7 years ago | 0

Question

constrained pso : how to set initial population ?

hi, i tried options = optimoptions('particleswarm', 'InitialPopulation', tous_xi); where tous_xi contains initial position...

7 years ago | 3 answers | 0

### 3

answersQuestion

options_pso.InitialPopulation : how to assign ?

hi, i now get an error when setting options.InitialPopulation = [1,2,3] for example, after having run options=pso . Can you help...

7 years ago | 1 answer | 0

### 1

answerQuestion

constrained pso : Not enough input arguments.

hi, in my code, I use [x, fval, exitflag] = pso(mapse_vu_sd, 7, [], [], [], [], ... lx, ux, mapse_CNL_sd_c) and I g...

7 years ago | 1 answer | 0

### 1

answerSolved

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 ...

7 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...

7 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:...

7 years ago

What exactly does TolCon do and how is relative max(constraint violation) calculated?

hi, the link in "Tolerances are described here" is not set : could you arrange this ? Thank you.

12 years ago | 0

Question

index of control loop that is a vector component

hi all, in order to make my code more compact, i tried this : for x(1) = lb(1) : d_x(1) : ub(1) for x(2) = lb(2) :...

12 years ago | 1 answer | 0

### 1

answerQuestion

How can I extract column vectors from matrix (with large number of columns) ?

Having a lot of columns, this way of extracting from a big matrix named C : temperature = C(:,1); index = C(:,2); ... ...

12 years ago | 2 answers | 1