SSG_newbiecoder
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Accept 5 answers given by other contributors
Awarded to SSG_newbiecoder on 06 Jan 2018
Feeds
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...
mehr als 4 Jahre vor | 2
Frage
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...
mehr als 5 Jahre vor | 1 Antwort | 0
1
AntwortFrage
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...
mehr als 5 Jahre vor | 0 Antworten | 0
0
AntwortenFrage
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...
mehr als 5 Jahre vor | 0 Antworten | 0
0
AntwortenFrage
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...
fast 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
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...
fast 6 Jahre vor | 0 Antworten | 0
0
AntwortenFrage
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...
fast 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
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'...
fast 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
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...
etwa 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
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...
etwa 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
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...
etwa 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
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...
etwa 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
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...
etwa 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
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 ...
etwa 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
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...
etwa 6 Jahre vor | 0 Antworten | 0
0
AntwortenFrage
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...
etwa 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
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 ...
etwa 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
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?
etwa 6 Jahre vor | 6 Antworten | 1
6
AntwortenFrage
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...
etwa 6 Jahre vor | 0 Antworten | 0
0
AntwortenFrage
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 ...
mehr als 6 Jahre vor | 2 Antworten | 2
2
AntwortenFrage
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...
mehr als 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
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...
mehr als 6 Jahre vor | 0 Antworten | 0
0
AntwortenFrage
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...
mehr als 6 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
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 ...
mehr als 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
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...
mehr als 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
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 ...
mehr als 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
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...
mehr als 6 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
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...
mehr als 6 Jahre vor | 0 Antworten | 0
0
AntwortenFrage
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?
mehr als 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
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...
mehr als 6 Jahre vor | 0 Antworten | 0
0
Antworten
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