# Davide Cannavacciuolo

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Question

How to do fast fourier analysis of first harmonic in matlab?

In simulink there is a block called, Fast Fourier Analysis, that given the fundamental frequency it extracts the phase delay and...

4 months ago | 1 answer | 0

### 1

answerQuestion

How to use do machine learning/neural networks in matlab?

I have a Displacement Trend, lets say D=[0 1 2 3 4] Associated with this Power Used: P=[0 5 4 2] The data recorded of the ou...

11 months ago | 1 answer | 0

### 1

answerQuestion

How to plot a vector for fixed intervals

Hello, I have a vector of times for example [t1 t2 t3 t4]. I also have a vector of values A=[a1 a2 a3 ] .I need to plot between ...

11 months ago | 1 answer | 0

### 1

answerQuestion

Simple Indexing problem when creating a matrix

I have this vector A=[0 60 120 180 240 300 360]; And I have a variable n. Lets say n=24. I neet a matrix with the first row A ...

11 months ago | 2 answers | 0

### 2

answersQuestion

How to find the x value of a function given by points?

tinterval=[0:0.001:40]; %sec acc=3; w0=30; Wspeed=acc*tinterval+w0; tetae=Wspeed.*tinterval; tetaeFract=rem(tetae,360); ...

11 months ago | 1 answer | 0

### 1

answerQuestion

Simulink - How to exctract the exact time the derivative is different from 0?

Hello I have this yellow signal: I need to subtract the blue output a constant that exactly the output of the yellow signal(yax...

11 months ago | 1 answer | 0

### 1

answerQuestion

Simulink - How to extract the time when the signal is on?

Hello, have the yellow signal and I am trying to extract the time as a constant only when the yellow signal is on. I have foun...

11 months ago | 2 answers | 0

### 2

answersQuestion

How to plot a matrix in 3d?

I would like to plot a simple square matrix in a 3d plot, where in xlabel there is the index of rows or colums as well for the y...

11 months ago | 1 answer | 0

### 1

answerQuestion

Help With for loop with tranfer function and step

s=tf('s'); G=1/(s^2+0.4*s+0.1); K=[1 2 3 4 5 6]; figure hold on for i=1:1:length(K) T=K(i)*G; step(T) S=...

11 months ago | 2 answers | 0

### 2

answersQuestion

Help with simple nested function

The function i am trying to get is: %first mode function g=hall(t) lolla=seno(t); function h=seno(t); h=sin(t);...

11 months ago | 3 answers | 0

### 3

answersQuestion

How to find the minimum of an array element, but in a interval?

I have an array A=[0.5 3 10] I want x=3. In general how to extract from an array minimum element in a interval. In this case i...

12 months ago | 2 answers | 0

### 2

answersQuestion

How to insert an input in a constant in simulink?

Hello, I have an input in simulink coming from another system. This input must be used as element in a matrix. The obtained matr...

1 year ago | 1 answer | 0

### 1

answerQuestion

How to use fminbnd but with multiple variables

I have a function of multiple variables defined in a specified range. They can be even vectors. I want to find the minimum of a ...

1 year ago | 2 answers | 0

### 2

answersQuestion

Which is the most accurate way to solve these equations?

Where for semplicity A, B, E can be assumed = 1. u, v and w are velocity components and t is time. Also intial contiti...

1 year ago | 1 answer | 0