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Gennaro Arguzzi


Università di Pisa

Last seen: 2 years ago |  Active since 2016

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Visualising symbols inside the tranfer fcn block in Simulink
I'm wondering if there is a way to visualise symbols inside the transfer fcn block in Simulink. I tried in this way, but it doe...

2 years ago | 1 answer | 0

1

answer

Question


Creating a multidimensional table
I'd like to create a multidimensional table. For example a 3D table with 10 stacked 3x3 matrices. I tried with this code, but i...

6 years ago | 3 answers | 0

3

answers

Question


Difference between angle2dcm and eul2rotm (same angle sequence, different result)
Hello everyone, I tried to use both functions angle2dcm and eul2rotm with the same angle sequence, but the results are different...

6 years ago | 2 answers | 0

2

answers

Question


Central numerical differentiation - Error
Hello everyone, I'm trying to implement the numerical differentiation by using central method: % x[k+1] - x[k-1]...

6 years ago | 1 answer | 0

1

answer

Question


Selecting more than one range of elements of a vector with a single line code
Hello everyone, i'm wondering if it's possible to select more than one range of elements of a vector with a single line code....

6 years ago | 1 answer | 0

1

answer

Question


Fixed axes during the iterations to plot 3D lines between two points
Hello everyone, I tried to write the code to plot a moving line in 3D by using the following code: r = 3; theta =...

6 years ago | 1 answer | 0

1

answer

Question


Saving orientation of a plot in the script
Hello everyone, is it possible to save a generic orietation of a plot and then recover it every time I run a script? For exam...

6 years ago | 1 answer | 0

1

answer

Question


Axes limits - plotv
Hello everyone, is it possible to specify the limits of axes when I use the statement plotv? I have the code: M1 = [1 0....

6 years ago | 1 answer | 0

1

answer

Question


Gradient plot as arrow - strange result
I tried to plot gradient as an arrow with: x=-10:2:10; f = -x.^2; u = gradient(x); n=length(u); for i...

7 years ago | 1 answer | 0

1

answer

Question


Plot arrows of the gradient for function of one variable
Hello everyone, how can I plot arrows of the gradient for function of one variable? For example f(x)= - x^2. Thank you so ...

7 years ago | 0 answers | 0

0

answers

Question


Result in term of pi greek
Hello everyone, I have the following statements: angle(-1+1i) atan2(-1+1i) The result is 2.3562....How can I get ...

7 years ago | 1 answer | 0

1

answer

Question


Subscript - Symbolic serie
Hello everyone. Is it possible to create a symbolic serie like this: a_0, a_1, a_2, a_3? I tried with the following wrong code: ...

7 years ago | 1 answer | 0

1

answer

Question


Verifing symbolic equality in MATLAB
Hello everyone. How can I verify a symbolic equality? For example: (a+b)*(a-b)=a^2-b^2 Thank you for your help.

7 years ago | 1 answer | 0

1

answer

Question


Result of z+conj(z) and z*conj(z) with z complex by default
Hello everyone. Is it possible to get z+conj(z)=2*Re(z) and z*conj(z)=(abs(z))^2 without defining z=a+1i*b? I tried to wrote: ...

7 years ago | 1 answer | 0

1

answer

Question


Implementing Z-Transform of -a^n*heaviside(-n-1)
Hello everyone, is it possible to implement a code that carries out the Z-Transform of an anticausal sequence like this -a^n*hea...

7 years ago | 0 answers | 0

0

answers

Question


Implementing Unilateral Z-Transform of a^n
Hello everyone, I wrote the following lines to implement the unilateral Z-transform of a^n: close all clear all syms ...

7 years ago | 1 answer | 0

1

answer

Question


Inverse Z-Transform of z/(z-a) - Strange result
Hello everyone, I tried to get the inverse Z-transform of z/(z-a) with the following lines: close all clear all syms ...

7 years ago | 2 answers | 0

2

answers

Question


Input signal -->abs block-->ideal low pass filter block-->output signal - Ideal low pass filter in Simulink
Hello everyone. I have the following time-continuous system: input signal -->abs block-->ideal low pass filter block-->output si...

7 years ago | 1 answer | 0

1

answer

Question


Derivative of sawtooth - interpretation of result
Hi everyone. I derived a sawtooth function: <</matlabcentral/answers/uploaded_files/82037/0.png>> with the following code:...

7 years ago | 1 answer | 0

1

answer

Question


Inverse Fourier transform of unilateral exponential function - ifourier MATLAB
Hi everyone. How can I get the inverse Fourier tranform of unilateral exponential? I tried with the following code: close...

7 years ago | 0 answers | 0

0

answers

Question


Replace a symbolic variable with a symbolic expression
Hi eveyone. I've the following code: close all clear all syms t Y=fourier(heaviside(t)); The result is Y = pi*d...

7 years ago | 1 answer | 0

1

answer

Question


symbolic variable - proving positive
Hi everyone. How can I prove that a symbolic variable is positive? It is not possible to use if statement for symbolic variables...

7 years ago | 1 answer | 0

1

answer

Question


{} and () brackets - creating array in for loop
Hi everyone. I read the following answer on stack exchange: <https://stackoverflow.com/questions/9055015/difference-between-a...

7 years ago | 1 answer | 0

1

answer

Question


getframe + frame2im + imwrite - Save figure
Hi everyone. I'd like to save a figure using statements getframe+frame2im+imwrite (without print statement). Is it possible to d...

7 years ago | 2 answers | 0

2

answers

Answered
Save string in structure
Ok, I solved problem: for i=1:3 file=strcat('Documento',num2str(i),' - by Gennaro'); struttura(i).nome=file; end ...

7 years ago | 0

Question


Save string in structure
Hi everyone. I'm trying to save string in a structure, but MATLAB shows me an error. for i=1:3 file=strcat('Documento'...

7 years ago | 1 answer | 0

1

answer

Question


Reference of Fourier series
Hi everyone. I'd like to know where I can find the reference of MATLAB documentation. In particular, where can I find the refere...

7 years ago | 1 answer | 0

1

answer

Question


M(i)=getframe(gcf) in for loop - Wrong result
Hi everyone. When I run the following code: f=0.1; hold on for k=[0:0.1:1/f] plotv([real(exp(i*2*pi*f*k)); imag(ex...

7 years ago | 1 answer | 0

1

answer

Question


Phase diagram database - Matlab
Hi everyone, has Matlab databases of phase diagrams? Thank you very much.

7 years ago | 0 answers | 0

0

answers

Question


Inputname statement - useful example
Hi everyone, could you help me to understand what is the useful of the inputname statement? I run the following example: ...

7 years ago | 3 answers | 0

3

answers

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