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Fabio Freschi


Politecnico di Torino

Last seen: 7 dagar ago Active since 2014

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Answered
How to plot with bar3 plot in MATLAB?
Check the code below, Hope it helps clear variables, close all B = [86, 82, 80]; B2 = [91, 88, 85]; B3 = [98, 95, 89]; ...

ungefär en månad ago | 1

| accepted

Answered
How to reduce the size of legend in a fig file?
You can try playing with the 'location' optional input, for example using legend('blabla1','blabla2','Location','bestoutside') ...

ungefär en månad ago | 0

Answered
How can I find fft of this function
try with fft

ungefär en månad ago | 0

Answered
Convert german numbers from excel to matlab (change comma versus point)
You may try to use readtable to import your data. It reads excel files and has the option 'DecimalSeparator' that can be set to ...

2 månader ago | 1

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Answered
Create multiple copies of one file in multiple directories with different names
Try this. Note: the file A.txt must be in the current folder % data N = 10; dirName = 'Folder'; fileName = 'A'; % loop ...

2 månader ago | 0

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Answered
How to rotating a stl object
You shoud translate the points p before the rotation and then move them back If R is your rotation matrix and the center of rot...

2 månader ago | 0

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Answered
Very tricky:Manipulation with complex array
Following @Paul suggestion % original vector X = [4, 1, 1, 3, 8, 12]; % reshape to have 2xN vector W = reshape(X,2,[]); ...

2 månader ago | 0

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Answered
Minimal-code to get axes limits of log-log plots, but using gscatter
You can remove the negative part of the axis before setting the log scale set(gca,'XLim',[0 max(xlim)],'YLim',[0 max(ylim)]); ...

6 månader ago | 0

Answered
How to plot Temperature vs Efficiency curve using For loop and Linspace?
I have commented your plots to avoid moltiple figures % numebr of temperatures nT = 100; % temperature vector T = linspace(2...

6 månader ago | 1

| accepted

Question


Calculation of consistent initial conditions for ODE
(minor edit) Hi everyone, I have written wrapper functions calling MATLAB's ODE solvers. Specifically, my problems are DAEs wi...

6 månader ago | 1 answer | 0

1

answer

Answered
How to find same unique in two different size arrays?
Use ismember % data x=[1 22 22 3 8 19]; y=[22 10 19 35]; % engine [iii,jjj] = ismember(y(:),x(:)); countCommon = su...

6 månader ago | 0

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Answered
Having trouble using for loops to create a matrix
I reproduce the result of the picture, because the question is not clear. a = 25 ; b = 5 ; c = (2*a)/b - 1 ; % do not use mi...

6 månader ago | 0

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Answered
How to plot a function
You may use fplot figure, hold on fplot(@(x)x.^-3,[1 1e5]) fplot(@(x)x.^-2.8,[1 1e5]) % use bi-logaritmic scale set(gca,'...

6 månader ago | 0

Answered
Ax = 0 with 2 values of x known
The post is old but the question arises many times, so I post here my solution. It is a generalization of @Matt J solution. Sup...

7 månader ago | 0

Answered
Looking for visualization method to present finite difference numerical solution in 2D
You may use the low-level patch function. Since I don't have your data, please find below a self-consistent example showing the ...

9 månader ago | 0

Answered
smooth step function with rise time
My colleague Sofia have found a paper [1] where authors report the analytic approximation of the piece-wise linear step function...

ungefär ett år ago | 1

| accepted

Question


smooth step function with rise time
Hi everyone, I know this question is more related to math than Matlab, but I know there are many gurus out there who can easily...

ungefär ett år ago | 3 answers | 1

3

answers

Answered
How can I calculate the sum of the absolute error?
Please check the code below. clear all, close all % model F = @(c,x)c(1)+c(2)*x+c(3)*(x.^2-1); % data xk = [-2 -1 0 1 ...

ungefär ett år ago | 1

| accepted

Answered
Drawing a rotating circle on a sphere
The code should be self-explicative [X,Y,Z] = sphere; % figure figure, hold on axis equal, view([1 1 1]); % sphere wit...

ungefär ett år ago | 0

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Answered
Showing me wrong Matrix Size.
multiply without the 'dot' OO= N*kk;

ungefär ett år ago | 0

Answered
How can you solve a system of second order differential equation, which is not time, but length and radius dependent?
This is not an ODE but a PDE. you should have a look at pdepe

ungefär ett år ago | 2

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Answered
We have a column vector and a row vector both of same lengths. How to use sum function to get element wise sum of two vectors and final answer display in row vector
vect3 = vect1.'+vect2 If you want to be sure of the element by element sum, regardles the shape of the two vectors (row or colu...

ungefär ett år ago | 0

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Answered
How to randomly change element of matrix?
You can use linear indexing % your matrix A = rand(10,100); % create the folder mkdir('storage'); % loop for i = 1:100...

ungefär ett år ago | 2

Answered
How to create a series of circle by using a specific radius in cartesian?
Try something like this % anonymous function to plot a circle given the center coordinates and the % radius plotcircle = @(x,...

ungefär ett år ago | 0

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Answered
Converting Euler ODE to the MATLAB code
f is an anonymous function f = @(t,y)[-2*y(1)+y(2)+15*cos(t); 2*y(1)-y(2)]; note that your script is not correct, since t is t...

ungefär ett år ago | 1

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Answered
How to call a variable matrix from one script to another script
I am not sure I have understtod correctly your problem. I give it a try. I would add an extra layer using an anonymous function...

ungefär ett år ago | 1

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Answered
How to use ~= operator as constraint function?
You may have a look here or here

ungefär ett år ago | 0

Answered
How to compare two time signals with different amount of samples?
Use interp1 to resample your vector(s) in order to have the same length clear variables, close all % time vector t1 = 0:1/1...

ungefär ett år ago | 1

Answered
solve efficiently sparse large linear system of equations
I would let the backslash operator work on this matrix sol = L\f; Can you share the original matrix to make other attempts?

ungefär ett år ago | 0

Answered
how to use lsqnonlin to solve conditional equation
The following code should be self explainatory. In the opposite case, simply ask clear all, close all % some dummy params va...

ungefär ett år ago | 0

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