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# afef

Last seen: 7 dagar ago Active since 2017

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Are the filters used for wavelet decomposition the same for each level ?
i'm using the wavelet transform decomposition (daubechies 4) and i want to know are the filters used for the decomposition the s...

ungefär 5 år ago | 1 answer | 0

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Question

What's the unit of the normalized frequency in Matlab.
I have used fdatool to design a filter and i used the normalized frequency. I know that it should be in the interval [0,1] but i...

ungefär 5 år ago | 2 answers | 0

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Question

How to plot the error between two signals?
I did the filtering of an EEG signal using fir filter then i implement this fiter in c langage. Now i need to plot the error be...

ungefär 5 år ago | 1 answer | 0

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Question

Implementation of the matlab function filtfilt in C language
I used in Matlab the function filtfilt for my Low pass fir filter : d1=designfilt('lowpassfir','PassbandFrequency',0.45,'Stop...

mer än 5 år ago | 2 answers | 0

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Question

How to generate c code for filtfilt for low pass fir filter
Hi, i used a low pass fir filter using the following function d1=designfilt('lowpassfir','PassbandFrequency',0.45,'Stop...

mer än 5 år ago | 0 answers | 0

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Question

How to calculate the wavelet coefficients of DWT when using sliding window?
Hi ,i used a c code for DWt(Db4 )to get the wavelet coefficients but my input signal is to large [2560] and i implement this cod...

mer än 5 år ago | 0 answers | 1

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Question

Generate C code from a filter created by designfilt ??
HI, i have created a low pass FIR filter using designfilt : d1=designfilt('lowpassfir','PassbandFrequency',0.45,'Stopband...

mer än 5 år ago | 0 answers | 1

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Question

What's the difference between decimated Discrete Wavelet Transform and Multilevel 1-D wavelet Transform ???
Hi, i have a little confusion between decimated Discrete Wavelet Transform and Multilevel 1-D wavelet Transform and i want to kn...

mer än 5 år ago | 0 answers | 0

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Question

How to calculate the percentage of energy corresponding to the coefficients of one-dimensional wavelet decomposition ?
Hi, i read the matlab documentation about how to calculate the energy for 1-D wavelet decomposition and i found that it returns ...

mer än 5 år ago | 0 answers | 0

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Question

What's the actual formula behind the MATLAB code for wenergy() ?
Hi, i need to know the formula behind wenergy() '[Ea,Ed] = wenergy(C,L) ' because i need to convert this to C code

mer än 5 år ago | 0 answers | 0

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Question

How to use the syntax of Multilevel 1-D wavelet decomposition in for loop ??
I have to use the syntax of Multilevel 1-D wavelet decomposition which is [c,l]=wavedec(x,4,'db4'); [cd1,cd2,cd3,cd4]=detc...

mer än 5 år ago | 0 answers | 0

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Question

how does Wenergy for 1-D wavelet decomposition works???
Hi , i read the matlab documentation about the energy for 1-D wavelet decomposition and i want to know how the calculation work...

mer än 5 år ago | 1 answer | 0

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Question

How to calculate the energy of details and approxmiations coefficients of discret wavelet transform ?
Hi everyone, i calculate the energy of details and approxmiations coefficients of discret wavelet transform .i used DWT(Daub4) H...

mer än 5 år ago | 2 answers | 0

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Question

How to calculate the energy of details and approxmiations coefficients of discret wavelet transform ?
Hi everyone, i calculate the energy of details and approxmiations coefficients of discret wavelet transform .i used DWT(Daub4) ...

mer än 5 år ago | 0 answers | 0

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Question

How to convert matlab code to C code?
Hi, i used Matlab for preprocessing EEG signal and i extracted some features fromm it by calculating maximum and minimum amplitu...

mer än 5 år ago | 1 answer | 0

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Question

How to write condition written in matlab with vhdl ?
i wrote a condition with matlab and i wanted to converted to vhdl i tried but i still got error message. Can anone help me pleas...

mer än 5 år ago | 0 answers | 0

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Question

How to calculate the filter order of given specification ??
Hi, i designed a filter using : d1=designfilt('lowpassfir','PassbandFrequency',0.45,'StopbandFrequency',0.5,'PassbandRip...

mer än 5 år ago | 1 answer | 0

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Question

Which version of system generator supported by MATLAB 2016a ?
Hi, i'm using MATLAB 2016a and when i tried to run the Xilinx System Generator 2014.2 i got this so can anyone tell e how to f...

mer än 5 år ago | 1 answer | 0

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Question

How to interpret the outputs of patternnet?
I created a neural network for classification and when i wanted to test it with new inputs the outputs was not like the target v...

mer än 5 år ago | 1 answer | 0

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Question

How to read result of sim using Patternnet ?
I created neural network for binary classification , i have 2 classes and 9 features using an input matrix with a size of [9 98...

mer än 5 år ago | 1 answer | 0

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Question

How to improve the performance of my neural network
Hi,i'm trying to create neural network for binary classification of epileptic seizure so i have 2 classes either normal or abnor...

mer än 5 år ago | 2 answers | 0

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Question

Why do i have NAN values in the confusion matrix only in the validation test?
I wanted to create neural network for binary classification for dataset with input matrix with size [9 981] and output matrix [1...

mer än 5 år ago | 1 answer | 0

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Question

Binary Classification _ problem with data structure
Hi, i want to create neural network for binary classification so when i read in matlab doc for patternet that Classification pro...

mer än 5 år ago | 1 answer | 0

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Question

bad results of my neural network _ newsgroup
Hi Dr Greg i tried to reply to your message in the NEWSGROUP in this link several times <https://www.mathworks.com/matlabcen...

mer än 5 år ago | 1 answer | 0

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Question

How to interpret this results after creating neural network ?
hi everyone i'm trying to create neural network for classification.I begin with the simple script that i got after using nprtool...

mer än 5 år ago | 1 answer | 0

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Question

How to do when the inputs ranges for neural network are not so uniform in magnitude ?
Hi,i'm trying to create neural network for classification of EEG signal in which i extacted 9 features that i will use it as inp...

mer än 5 år ago | 1 answer | 0

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Question

How to analyse the results of training of neural network
Hi, i tried to create neural network for classification using nprtool and i tried to modify the code but i couldn't analyse the ...

mer än 5 år ago | 1 answer | 0

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Question

2-Class Problem with patternnet
Hi, I have a problem using the NN toolbox a neural network shall be trained to recognize a two class problem. I used the default...

mer än 5 år ago | 1 answer | 0

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Question

Normalize Inputs and Targets of neural network
Hi, i'm trying to create neural network using nprtool , i have input matrix with 9*1012 and output matrix with 2*1012 so i norma...

mer än 5 år ago | 1 answer | 0