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# Fabio Freschi

### Politecnico di Torino

Last seen: Today Attivo dal 2014

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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]; ...

circa un mese fa | 1

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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') ...

circa un mese fa | 0

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How can I find fft of this function
try with fft

circa un mese fa | 0

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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 mesi fa | 1

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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 mesi fa | 0

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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 mesi fa | 0

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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 mesi fa | 0

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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 mesi fa | 0

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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 mesi fa | 1

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Domanda

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 mesi fa | 1 risposta | 0

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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 mesi fa | 0

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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 mesi fa | 0

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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 mesi fa | 0

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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 mesi fa | 0

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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 mesi fa | 0

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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...

circa un anno fa | 1

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Domanda

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...

circa un anno fa | 3 risposte | 1

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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 ...

circa un anno fa | 1

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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...

circa un anno fa | 0

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

circa un anno fa | 0

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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

circa un anno fa | 2

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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...

circa un anno fa | 0

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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...

circa un anno fa | 2

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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,...

circa un anno fa | 0

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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...

circa un anno fa | 1

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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...

circa un anno fa | 1

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

circa un anno fa | 0

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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...

circa un anno fa | 1

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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?

circa un anno fa | 0

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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...

circa un anno fa | 0

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