Community Profile

photo

Fabio Freschi


Politecnico di Torino

60 total contributions since 2014

Contact

Fabio Freschi's Badges

  • Thankful Level 2
  • 3 Month Streak
  • Revival Level 1
  • Knowledgeable Level 2
  • First Answer
  • Scavenger Finisher
  • Solver

View details...

Contributions in
View by

Answered
How to put a variable equal to a vector in an if cycle
My guess % your data TIMEFAILURECOG= [2 4 10 50]; Matrixdiff=[0,TIMEFAILURECOG]; DIFFERENCE=diff(Matrixdiff); INDEXCOG1=fin...

alrededor de 14 horas ago | 0

| accepted

Answered
Invalid indexing when simplifying a symbolic expression
C is used as a function C(k3r+k4f)

4 días ago | 0

Answered
Could anyone help me to solve the issue.
For your case NN = mat2cell(A,[1 1 1],2) A bit more general NN = mat2cell(A,ones(size(A,1),1),size(A,2))

4 días ago | 0

Answered
how to plot a fitness or objective function with optimum values
objFun = @(x)100.*(x(:,1).^2 - x(:,2)).^2 + (1 - x(:,1)).^2; conFun = @(x)[x(:,1).*x(:,2)+x(:,1)-x(:,2)+1.5, 10-x(:,1).*x(:,2...

6 días ago | 0

Answered
Multi-objective optimisation using results from external simulation
Look at this video https://www.youtube.com/watch?v=Lgjf0vWl7Ik it seems the author is doing a similar data exchange between Di...

6 días ago | 0

Answered
Recall elements inside the rows of a matrix based on a predefined array
A = M(V,:);

6 días ago | 0

| accepted

Answered
how to draw a 3d surface of exp(x+iy)
Suppose that you want to plot the magnitude of the exp(z) % setup the range of your plot in x and y (-2,2) and the resolution (...

7 días ago | 1

Answered
could anyone help me how to display the position of all the numbers present in matrix.
[iRow, jCol, value] = find(A); then you can put them in a matrix, if you like position = [value, iRow, jCol];

7 días ago | 1

Answered
could anyone help me to calculate the euclidean distance for the matrix.
I have found that this is usually the fastest way, since the square of the binomial is unrolled D = sqrt(abs(bsxfun(@plus,sum(A...

7 días ago | 0

Answered
Take values from an matrix automatically.
Prog_old = Prog; % modify Prog as desired Prog = Prog*2; % dummy operation % reload the old version Prog = Prog_old;

7 días ago | 0

Answered
picking up data file in each iteration
Following Stephen link numFiles = 200; for k = 1:numfiles fileName = sprintf('s%d.mat', 1008+10*k); data = load(fileNa...

7 días ago | 1

Answered
Filling gaps in time series with Nan
For the particular case % preliminary setup newData = [1:10; NaN(1,10)]'; % fill-in newData(data(:,1),2) = data(:,2) To m...

8 días ago | 0

Answered
Removing char in a mixed string column so only numerical values are left?
Check erease erease(yourString,'LED');

8 días ago | 1

Answered
Separating of succecive monotonic vectors
Let's assume your data are stored in x and y vectors. I take them from your picture % get the data from picture fig = gcf; ax...

8 días ago | 0

| accepted

Answered
How to stop annoyed messages in command window?
I have a similar problem with Mac because I installed a package to manage split screen, named BetterSnapTool. For Linux, see if...

8 días ago | 0

| accepted

Answered
Make a program to convert a number to decimal, octal, hexadecimal and binary value
You can use the functions bin2dec dec2bin hex2dec dec2dex and the more general dec2base base2dec

8 días ago | 0

| accepted

Answered
How to assign a different name of a matrix for each iteration?
Don't use this sintax (for details, see https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not...

8 días ago | 2

| accepted

Answered
remove specific rows by referencing on the first digit of each row.
index = 1; % A(:,1) == index finds the rows with specific value (logical indexing) B = A(A(:,1) == index,:)

9 días ago | 0

Answered
delete and insert entries in a vector
If A is a matrix, I assume you have column vectors, if not, please provide A % your (column) vector c = [1 1 3 4 5 6 7 8 11 10...

9 días ago | 0

| accepted

Answered
combining different size arrays based on time dimension and compute average for the last column
find rows in M2 that are present in M1 (assuming that all rows in M2 are present in M1 [~,iRows] = ismember(M2(:,1:4),M1(:,1:4)...

9 días ago | 0

| accepted

Answered
Sort of peak analysis
If the signal is not too noisy you can work with ‘diff’ and look for the change of sign

10 días ago | 1

Answered
How to improve the accuracy of lu decomposition?
It's a weird way to check the accuracy. What about checking the norm of the residual % data N = 5; A = rand(N)+eye(N)+1j*rand(...

11 días ago | 0

Answered
matrix multiplication for "3-D" matrices
Let's start saying that the data structure you are using is not the best one. See https://www.mathworks.com/matlabcentral/answer...

11 días ago | 0

Answered
MATLAB doesn't let me plot 3 graphs in the same plot
As Guillame pointed out, you just have to plot them (without the indexing): h = figure; hold on, grid on plot(t,v); plot(t...

12 días ago | 0

Answered
MATLAB doesn't let me plot 3 graphs in the same plot
The problem is here plot(tm,ve(i+1),'green') ... plot(tn,vi(i+1)) ve(i+1) is a number, as well as vi(i+1), while tm and tn a...

12 días ago | 0

Answered
Best way to calculate the determinants of a series of matrices?
Not sure if it you can speedup your code, but a single line code to do the job is Delta = arrayfun(@(i)det(squeeze(G(i,:,:))),1...

12 días ago | 0

Answered
Compute execution time without printing statement?
You can just save the value in a variable timerValue = tic; % something very useful to do tstop = toc(timerValue);

13 días ago | 0

Answered
Extract data in a single vector after a FOR cycle
Ciao, You can try to reshape your data, then apply max on the columns media_reshape = reshape(media,85,113); max_media = max(...

13 días ago | 0

| accepted

Answered
Comparing Duration Arrays is time consuming - How to improve my script?
Not sure if I understand correctly the problem without data. I try: idx = find(clock > tdur(1),1,'first')

13 días ago | 0

| accepted

Load more