# Luca Amerio

### Politecnico di Milano

Professional Interests: Civil and structural engineering

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**Content Feed**

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 ...

oltre un anno 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...

circa 3 anni ago | 0 answers | 1

### 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...

circa 3 anni 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 ...

circa 3 anni 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...

circa 3 anni 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...

oltre 3 anni ago | 0 answers | 0

### 0

answersQuestion

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 ...

oltre 3 anni 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 ...

oltre 3 anni 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...

oltre 3 anni ago | 1 answer | 0

### 1

answerSubmitted

HDF2Struct

Reads HDF5 files and returns data in a structure

oltre 3 anni ago | 5 downloads |

Question

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). ...

oltre 3 anni ago | 3 answers | 0

### 3

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

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

oltre 4 anni 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 ...

oltre 4 anni 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...

oltre 4 anni 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 ...

oltre 4 anni 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...

oltre 4 anni 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 ...

oltre 4 anni 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 ...

oltre 4 anni 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...

circa 5 anni 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...

circa 5 anni 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...

circa 5 anni 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.

circa 5 anni 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...

oltre 5 anni 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...

oltre 5 anni 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)...

circa 6 anni 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. ...

circa 6 anni 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,...

circa 6 anni 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)...

circa 6 anni 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 ...

circa 6 anni 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 ...

circa 6 anni ago | 1 answer | 0