# Fabio Freschi

### Politecnico di Torino

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**Programming Languages:**

C++, C

**Spoken Languages:**

English

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**14** Questions

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**Feeds**

turn of automatic docking

You can run set(0,'DefaultFigureWindowStyle','normal'); to have undocked figures. If you want it to be the default, you can w...

4 maanden ago | 0

| accepted

How to solve and plot second order differential equation using ode45?

In your code there is a mistake in the definition of x(1) and x(2) I have made a few stylistic changes (parameters outside the ...

5 maanden ago | 0

exponential regression functions with error in input values

you can use lsqnonlin or lsqcurvefit clear variables, close all % data x = [4 25 100]; y = [100 50 0]; % fitting functi...

5 maanden ago | 0

| accepted

Runge-Kutta 4th order method for 2nd order differential equation with complex number

Your code is working correctly: in fact, if you use the built-in ode45 solver, you obtain exactly the same result. My guess ther...

5 maanden ago | 0

stl write triangulation error.

There are two errors The output of surf2solid is not a triangulation object inputs of stlwrite are in the wrong order sidelen...

6 maanden ago | 0

| accepted

Conditional Question Matlab Disagreement

I agree with all the comments and answers. But maybe one should read (6+3)>8>2 as "is 8 larger than 2 and lower than (6+3)?" tha...

6 maanden ago | 0

How to convert 2d implicit plot to 3d plot?

For every value of c you have a different surface. So you can plot one surface at a time. For example % param value c = 0; ...

6 maanden ago | 0

How I can split a two column data into chunks like this snap shot

If I have understood correctly, this code should to the job. Note that 83 is a prime number, so it is difficult to create chunks...

6 maanden ago | 0

fprintf formatting problem with cell and array matrix 2

With mixed data tipes the simplest thing is to use a for loop clear, clc, close all %% input data fracs = ... [1.0807995...

6 maanden ago | 1

Related to comparing two vectors

You can compare the two complete vectors (you also compare zeros, but who cares?) % data v1 = [0 0 0 4 5 0 0 0].'; v2 = [0 0 ...

6 maanden ago | 0

| accepted

Show matrix is not invertible.

You can simply show that A is not full rank syms a b c d e f g h A = [a 0 0 b 0; 0 c 0 0 d; 0 0 e f 0; 0 0 0 0 g; 0 h 0 0 0] ...

6 maanden ago | 0

Visualize CFD data in a 2D mesh

I assume you have the connectivity of your cells, if not you can create it with delaunay. Then use the low level funciton patch....

6 maanden ago | 1

| accepted

Solving systems of equations graphically and finding where they cross.

@Matt J solution is the cleanest. I have understood you want to find the graphical intersection. If you want to do it yourself y...

6 maanden ago | 0

Finding sum of for loop with if else statement

You must move your sum inside the loop increment your summation variable Note that your vector is complex and plot displays o...

6 maanden ago | 0

Method to get as large and few as number boxes

The following attempt is far from being a perfect answer to your question. All perplexities of @Walter Roberson are also mine, s...

6 maanden ago | 2

| accepted

Converting MATLAB Isosurface into Triangulation object for .stl export

You don't need to use surf2patch. You can extract infos directly from the struct created by isosurface isosurf = isosurface(tif...

6 maanden ago | 0

| accepted

Issue connectivity faces with isosurface

Sorting of the faces does not guaratee the property you think exist. If you check, your isosurface is a closed surface: all edge...

6 maanden ago | 0

How to graph values of different lengths?

@Nicole, you initialize the vector EV_power to have length 24*60*7 = 10080, however in the two nested loops, the dimesion change...

6 maanden ago | 0

Problem fitting the curve with fminsearch

I would use lsqnonlin: it's more general than polyfit suggested by @Torsten (that in this case would work perfectly). Qualitativ...

7 maanden ago | 1

| accepted

Identify some nodes near a known node

You can use featureEdges. You get both upper and lower nodes, but it's not difficult to distinguish them You can also check for...

7 maanden ago | 1

| accepted

How do I start counting when below a threshold and stop counting above the same threshold in a timeseries?

Below you can find a possible solution that does not require any toolbox % signal length N = 100; % threshold t = 0.5; ...

7 maanden ago | 0

Creating a For Loop to Compare Every Two Cells in Array

I try to translate your pseudocode into Matlab instructions HD_Affect = ["Neutral" "Positive" "Negative" "Positive" "Neutral" "...

7 maanden ago | 0

delete the top and bottom triangular faces of the 3D object

By looking at your data I see that the top and bottom triangles have a predominant z direction of the face normals. So I play wi...

7 maanden ago | 0

| accepted

order the rows of the 3 matrices starting from the third coordinate of the point P

If you want to sort A according to the third column you can simply do the following % your data A = [28.0445 -17.2717 83.972 1...

7 maanden ago | 0

identify the coordinates of a point P (1x3) in three distinct matrices

You can use ismember % data A = [28.0445 -17.2717 83.972 1 2 3 27.8199 -16.986 83.3748 4 5 6 27.2756 -16.339 81.871 ...

7 maanden ago | 1

| accepted

Skin effect formulas with imaginary numbers problems

There are several problems in your script you forgot the empy space permeability you are misinterpretating the concept of comp...

7 maanden ago | 2

| accepted

Is it possible to programmatically get a list of all file dependencies included in my standalone application (Matlab Compiler )

Never used Matal Compiler, so I don't now if I'm of help. In any case I put my 50 cents in. When I want to extract all matlab f...

7 maanden ago | 1

How to write axes on an imported mesh

You can use quiver3. In the example below I plot the 3 coordinate axes, you can modify accoridng to your vectors clear variable...

7 maanden ago | 0

stl fusion of two files

While waiting for more details about the inputs, I make my guesses. if your objectSTL has nodes/faces/normals, you can't addres...

7 maanden ago | 0

How to make a nonperiodic signal periodic?

I had the same idea of @William Rose, here is a possible implementation clear variables, close all % anonymous function v...

7 maanden ago | 3

| accepted