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SSG_newbiecoder


32 total contributions since 2017

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Answered
Shifting a signal to the right or left
I'll try to explain with an example. Let X={1 2 3 4 5} be our sequence. s = zeros(size(X)) s={0 0 0 0 0} Right shift If we...

7 months ago | 1

Question


How can I increase the notch attenuation without changing the bandwidth?
I have designed a notch filter of 50Hz cutoff frequency and 8Hz bandwidth and the sampling rate is 1500Hz as shown in the code b...

1 year ago | 1 answer | 0

1

answer

Question


cascading two notch filters designed using iirnotch
Hello, I want to develop a 50 Hz notch filter for ECG denoising. While using iirnotch I'm getting around 20 dB attenuation and a...

1 year ago | 0 answers | 0

0

answers

Question


Unwanted peaks in the output of a Notch filter
Hello, I recently tried to implement an IIR Notch filer that will help me remove the 50 Hz noise in the ECG signal we acquired i...

1 year ago | 0 answers | 0

0

answers

Question


How to plot the phase response of dft using fft in matlab
Hello, I have a doubt, I was trying to plot the phase response of a sin wave using fft, but I got something that is kind of like...

2 years ago | 1 answer | 0

1

answer

Question


Creating a GUI for an ECG arrhythmia classifier
Hello, I am working on an arrhythmia classifier using matlab. The work is almost done and now I think it will look more presenta...

2 years ago | 0 answers | 0

0

answers

Question


Is there a maximum limit to the number of features given as input to a PNN? And how to find the optimum spread value?
Hello, I am trying to classify ECG arrhythmia conditions using the PNN . Right now I'm considering 5 classes. I have 52 features...

2 years ago | 1 answer | 0

1

answer

Question


Error in annotation conversion
Hello, I'm trying to convert the annotations file I have to numbers and I have written the code below but for AFIB condition, I'...

2 years ago | 1 answer | 0

1

answer

Question


How to select the first i columns of a matrix?
Hello, I have a nxn matrix X. I need to select the first i columns alone of the matrix within a for loop. How can I do this? I'm...

2 years ago | 1 answer | 0

1

answer

Question


Can we do matrix operations on a matrix that might contain NaNs in it?
Hello, This is not any doubt in matlab but about matrices. I have a feature matrix of an ECG signal. It can have NaN elements. F...

2 years ago | 1 answer | 0

1

answer

Question


writing into excel sheets while keeping the leading zeros
Hello, is there any way to keep the leading zeros in my number while saving to excel sheet as a csv file? I should be getting 00...

2 years ago | 1 answer | 0

1

answer

Question


How can I read a column from a word file?
Hello, I have a word document like this and I want to read only the Type column and save it as a csv file. Is it possible in mat...

2 years ago | 1 answer | 0

1

answer

Question


DIVIDING A SIGNAL INTO SHORTER SEGMENTS AND SAVING THEM
Hello, I have a signal of 30 minutes duration. It is a csv file. I want to divide it into non overlapping segments of 10 sec dur...

2 years ago | 1 answer | 0

1

answer

Question


NAMING THE FILE TO BE SAVED
Hello, I have a ECG feature extraction algorithm. I want to save the extracted feature matrix as a csv file. I have done it but ...

2 years ago | 1 answer | 0

1

answer

Question


WHAT IS LABEL IN FEATURE SELECTION
In terms of feature selection what does the word "label" means? I'm trying to implement a feature selection algorithm and in tha...

2 years ago | 0 answers | 0

0

answers

Question


Is findpeaks same as local maxima?
Hello, I applied findpeaks to my signal and found out the local maximas. I read that it takes the local maxima by checking if t...

2 years ago | 1 answer | 0

1

answer

Question


How to compensate for the delay introduced by an IIR notch filter
Hello, I'm using an IIR notch filter(using iirnotch command) to remove the powerline interference. Will there be a delay due to ...

2 years ago | 1 answer | 0

1

answer

Question


Shifting a signal to the right or left
How can I shift a signal to the left or right? Is there any inbuilt command for it?

2 years ago | 3 answers | 0

3

answers

Question


compensation of delay after filtering
Hello, I have a doubt. It is not related to matlab but if anyone can help me it will be great. I have a signal x[n]. I'm applyi...

2 years ago | 0 answers | 0

0

answers

Question


finding zero crossings in a signal
I need to find out the zero crossing points in a signal. How can I achieve this in matlab? I tried the code below but it is not ...

2 years ago | 2 answers | 1

2

answers

Question


deleting values from an array
I have an array R3. I need to eliminate those elements of R3 which are present in another, smaller array. Is there an easy meth...

2 years ago | 1 answer | 0

1

answer

Question


Is swt same as algorithm atrous?
I need to implement algorithm atrous to get time invariant wavelet decomposed signals.Is it the same as applying swt? Can somebo...

2 years ago | 0 answers | 0

0

answers

Question


comparing the maximum value of a matrix to the other values
Hello, I have a question. I need to compare the maximum value in an array to the other elements in an array and check if it is g...

2 years ago | 2 answers | 0

2

answers

Question


function similar to count
Is there any function similar to count that can be used in an array of 1's,-1's and 0's to count the number of 1's present in a ...

2 years ago | 1 answer | 0

1

answer

Question


selecting certain elements of an array
hello, I have an array of 200 elements. I'm trying to apply certain conditions to the elements in the array. I have to select 2...

2 years ago | 1 answer | 0

1

answer

Question


array manipulation using location
Hello, I have an array X and another array Y which has some of the indices in array X. I need a new array which will have the X ...

2 years ago | 1 answer | 0

1

answer

Question


selecting i element non overlapping subsets of an array of length n
Hello, I have an array of length n. I need to select the first i elements and manipulate it and then take the next non overlapp...

2 years ago | 2 answers | 0

2

answers

Question


applying a time domain window to a wavelet domain signal
Hello, I have a wavelet domain signal which is decomposed up to 4 levels. I need to apply a window of 120ms on each level. How c...

2 years ago | 0 answers | 0

0

answers

Question


finding the maximum of values after and before a specific value
hello, I have a doubt.Is it possible to find out the maximum values before and after the ith element in an array?

2 years ago | 1 answer | 0

1

answer

Question


applying a time constraint to a wavelet domain signal
Hello, I have a wavelet domain signal in which I have to introduce a time constraint. I have to check the no. of maximas within...

2 years ago | 0 answers | 0

0

answers

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