# Luca Amerio

### Politecnico di Milano

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Professional Interests: Civil and structural engineering

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Question

Generate timehistory from PSD

I'm trying to generate a time-history from a synthetic PSD. My idea (happy to accept other solutions) was to turn the PSD into ...

3 years ago | 0 answers | 0

### 0

answersQuestion

Restore standard interactive axes behavior (callback) when using custom ButtonDownFcn

In the latest MATLAB versions, by default, axes got a very neet degree of interactivity. For example, just doing [X,Y,Z] = pe...

4 years ago | 0 answers | 2

### 0

answersQuestion

Get position when using uicontextmenu

I'm trying to code an interface that alows the user to perform some actions on a set of points visualized as a scatter plot. To...

4 years ago | 2 answers | 0

### 2

answersQuestion

pyenv function not found

I'm trying to call a python function from matlab. I'm following the instructions found in Undefined variable "py" or function ...

4 years ago | 1 answer | 0

### 1

answerQuestion

splash screen for compiled application is not hard-coded in the app and can be modified

When launching a compiled application, the app look in the folder it is launched from for a file with the same name of the splas...

4 years ago | 1 answer | 0

### 1

answerQuestion

Figure toolbar disappears when selecting 3-D rotate

The following code produces a figure without the standard toolbar, but leaving the new "axes" toolbar with the zoom, rotate, dat...

5 years ago | 1 answer | 0

### 1

answerQuestion

Why this bandpass butterworth is unstable (while the corresponding low and high pass are stable)?

I have a signal sampled at 750Hz T = 60; fs = 750; t = (0:T*fs-1)/fs; x = sin(6*t) + 0.1*rand(size(t)); I want to filter ...

5 years ago | 1 answer | 0

### 1

answerQuestion

Apply Frequency Response Function to time series

I have a time series and a (complex) frequency response function . I want to compute the time history obtained applying to ...

5 years ago | 1 answer | 0

### 1

answerQuestion

What `gcbf` stands for?

I never remember the syntax of the gcbf command because I cannot understand what it stands for. gcf stands for "Get Current Fig...

5 years ago | 1 answer | 0

### 1

answerQuestion

How to fit a line through this data "smartly" ?

I have the x-y data shown in the figure below (for the curious, it is the logarithm of the amplitude of a Hilbert transform). ...

5 years ago | 3 answers | 0

### 3

answersimage(x,y,A) fails on log axis depending on axis's limits

From the MATLAB Technical Support: ------------------------------------------------------------------------------------------...

6 years ago | 0

| accepted

Question

Apply function (str2double) to each element in a timetable

Hi I have a timetable where some numeric fields are stored as strings and other as 1x1 cell arrays of strings (of char array ...

6 years ago | 1 answer | 0

### 1

answerSolved

Pizza!

Given a circular pizza with radius _z_ and thickness _a_, return the pizza's volume. [ _z_ is first input argument.] Non-scor...

6 years ago

Question

slicing an M-by-N-by-3 matrix using an M-by-N matrix of logical values

Hi everybody I have an RGB image as a MxNx3 matrix. I would like to slice it using an MxN matrix of logic values (one for ...

6 years ago | 2 answers | 0

### 2

answersQuestion

image(x,y,A) fails on log axis depending on axis's limits

Hi The question is pretty much self explanatory given the following example The following code *works*: figure A = r...

6 years ago | 2 answers | 1

### 2

answersQuestion

New instance of matlab opening every time I double click a matlab file

Hi Every time i double click a matlab file (*.m, *.mat or *.fig) in an explorer windows, a new MATLAB instance starts, even if ...

6 years ago | 1 answer | 3

### 1

answerQuestion

Interactive GUI Patch/Tessellation

Hi everybody I'm trying to design a GUI where the user is able to draw a series of connected patches (a tessellation) over a ...

6 years ago | 0 answers | 0

### 0

answersQuestion

MinGW add-on installation fails

Hi I'm trying to install MinGW to compile a .c file. I'm using the Add-Ons menu as suggested by https://it.mathworks.com/help...

6 years ago | 2 answers | 3

### 2

answersSolved

calculate PI without using pi function

There are many methods to get the pi(Ratio of circumference to diameter). You should get pi without using the pi function in M...

6 years ago

Question

Get maximum number of outputs from anonymous function

Hi everybody. I would like to call a function from within another function. The problem is that i don't know a-priori the numbe...

6 years ago | 2 answers | 0

### 2

answersSubmitted

tabbedFigure(parentFig,tabName,source)

Creates a new tabbed figure window or adds a new tab to an existing one.

6 years ago | 1 download |

Question

Neural network with time-history input

Hi everybody I would like to create a NN with a time-history as input and a single value as output How can I do it? than...

7 years ago | 1 answer | 0

### 1

answerQuestion

Find estimator for bivariate distribution

Hi I have a set of Joint Probability Density Functions obtain from some sets of data. I would like to find the "best fitting li...

7 years ago | 0 answers | 0

### 0

answersQuestion

Equivalent of [C{:}] for vertcat

To concatenate horizontally the content of a cell array we can use the very practice syntax [C{:}]. For example: A = {(1:3)...

7 years ago | 4 answers | 1

### 4

answersQuestion

Compute that portion of a surface above a threshold

Hi. I have a variable Z define over a grid of points X,Y. I would like to compute the area of my domain where Z>threshold. ...

7 years ago | 1 answer | 0

### 1

answerQuestion

CurrentCharacter properties not working as expected

Hi everybody. if I run the code h=figure; h.CurrentCharacter=char(i); disp(double(h.CurrentCharacter)) for i=1,...

7 years ago | 1 answer | 0

### 1

answerQuestion

Pause until a figure close OR a button is pressed

Hi. In the middle of my script I ask the user to zoom a figure and call ginput afterwards. I would like to interrupt (return)...

7 years ago | 1 answer | 0

### 1

answerQuestion

Create a nested structure using a variable as field name

Hi everybody Lets say that I have a variable path='\levelOne\levelTwo\levelThree' of which *I don't know the number ...

7 years ago | 1 answer | 2

### 1

answerQuestion

Save changes to class properties with dot notation

Let's say I have a simple class like this one: classdef MyData properties Data = 0; end methods ...

7 years ago | 1 answer | 0