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Lucrezia Cester


Last seen: 1 year ago |  Active since 2019

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Question


how to plot higher order levels of the wavelet scattering transform?
As the title says, how to I visualize with a scalogram the different outputs of the scattering transform? In the same way that i...

2 years ago | 1 answer | 0

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answer

Question


How many wavelets are there per filterbank?
Hello, Does anyone know how many wavelets there are per filterbank? For example, if the quality factor is 8, how many wavelets ...

3 years ago | 0 answers | 0

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answers

Question


What is the scattering coefficient matrix returning when using the function FEATUREMATRIX?
smat = featureMatrix(sf,x) [smat,u] = featureMatrix(sf,x) smat = featureMatrix(___,Name,Value) I thought smat were the ...

4 years ago | 1 answer | 0

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answer

Question


how to divide matrix using mat2cell
Hello, I have a 9 matrices of size 1x21996, how can I divide the 9 matrices to be 6 of 1x3666 each? I tried this but it...

4 years ago | 1 answer | 0

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answer

Question


how to save iterations obtained from mat2cell?
I have a cell array A made up of matrices that I want to split up so I do this loop for i = 1:numel(A) B= mat2cell( A{i},[1]...

4 years ago | 1 answer | 0

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answer

Question


how to work with variables with different names in a loop?
Hello, I have a bunch of data taken in the lab which has names such as A1,A2... AN ... ETC. How can I work with these data...

4 years ago | 1 answer | 0

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answer

Question


how to partition data into testing and training
Hello, I am trying to train a ML network. I am using a matlab function which partitions my data into training and testing set...

4 years ago | 1 answer | 0

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answer

Question


how does the frequency change when you take the details coefficients of the wavelet transform?
Hello, I am using the wavelet decomposition to get the details coefficients of my signal. From my understanding, if I had...

4 years ago | 1 answer | 0

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answer

Question


what's the difference bewteen the scatternign tarsnform and cwt function?
Aren't both funxtions supposed to give you the continuos wavelet transform coefficients? What's the difference between these ...

4 years ago | 1 answer | 0

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answer

Question


why are the scalogram coefficients given in a table rather than matrix?
Hello, I am trying to get the scalogram coefficients from U, filterbank 2. s = scatteringTransform(sf,x) [s,u] = scatteringTr...

4 years ago | 0 answers | 0

0

answers

Question


how to interpret scalogram coefficients
Hello, Once I obtain the scalogram coefficients and can make an image of them with this code. [S,U] = scatteringTransform(...

4 years ago | 1 answer | 0

1

answer

Question


What is the difference between input of cell array {[Hi]} and {'Hi'}
As the title says, I have a cell array which contains data in this format {[Hi]} but I want to turn it to {'Hi'} ...

4 years ago | 1 answer | 0

1

answer

Question


How can I add zeros between elements of a matrix?
I have a vector [1,2,3]; and I want to obtain [1,0,2,0,3,0]; How can this be achieved?

4 years ago | 2 answers | 0

2

answers

Question


What is the difference between scalogram and scatteing coeffcients??
figure scattergram(sf,U,'FilterBank',1) What's the difference between scalogram and scatterinf coefficients ? Also, w...

4 years ago | 1 answer | 0

1

answer

Question


how to get coefficients out of scattergram?
Hello, I have input a 1d signal on amplitude versus time of an ECG signal as y in the below code Fs = 12000; sf = waveletS...

4 years ago | 0 answers | 0

0

answers

Question


How to align two noise signals with different phases?
Hello, I have the two signals as shown below. These two signals are sound signal and they carry the same information, however...

4 years ago | 0 answers | 0

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answers

Question


Fourier Transform spatial resolution
Hello, I have a gaussian fucntion whose output image is shown below. Each index in this figure is supposed to be = 1 cm. ...

4 years ago | 0 answers | 0

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answers

Question


Fresnel diffraction at an angle
I have written a code for Fresnel diffraction. [M,N]=size(gaussian); %get input field array size L=8000; z=10000; dx=L/M;...

4 years ago | 1 answer | 0

1

answer

Question


Fraunhofer diffraction of circular aperture
Hello, I am trying to see how a speckle pattern changes with distance after it scatters from a rough surface. I am using Fraun...

4 years ago | 1 answer | 0

1

answer

Question


Finding a value from spectogram
I created this spectogram through a vector of amplitudes. How can I find the max(:) Power/Frequency of this graph if I wasn'...

5 years ago | 0 answers | 0

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answers

Question


saving matrices with different cell sizes
Hello, I am running a for loop whose output is a matrix of different size at each iteration for c =1:1001 speckle_change...

5 years ago | 0 answers | 0

0

answers

Question


Fraunhofer diffraction simulation in matlab
Hello, I have simulated how light would diffract by going through a phase mask. Below is the code. lambda=0.6*10^-6; % wavele...

5 years ago | 0 answers | 0

0

answers

Question


Fraunhofer diffraction through scattering media
close all; clear all; lambda=0.6*10^-6; % wavelength, unit:m delta=80*lambda; % sampling period,unit:m z=1; % propagation dis...

5 years ago | 0 answers | 0

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answers

Question


how to change a .txt file to a .mat file
Hello, I have a .txt file that I want to convert into a .mat file. I tried this code M = dlmread('test_background_id.txt...

5 years ago | 1 answer | 0

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answer

Question


system of non linear functions
Hello, I get an error saying not enough input arguments. I literally tried to go step by step from the matlab tutorial for n...

5 years ago | 1 answer | 0

1

answer

Question


Finding max value and its position in ed matrix
Hello, I know this question has alreayd been asked a million times, yet I have not managed to solve it by looking at previous...

5 years ago | 1 answer | 0

1

answer

Question


tresholding by summing over a dimension of a matrix
Hello, I am trying to treshold data by summing over elemtns in the third dimension of a matrix and if the sum of all elements...

5 years ago | 1 answer | 0

1

answer

Question


summing along 3rd dimension every 10 frames
Hello, I have a matrix of 32x32x2500. I would like to sum it along the third dimension so to have a matrix of 32x32x250 so tha...

5 years ago | 3 answers | 0

3

answers