# Jan Ali

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**Content Feed**

Question

What is the unit for instantaneous energy on the color bar in the Hilbert spectrum

When applying hht(imf,fs) we get Hilbert spectrum showing a colorbar on the right for the instantaneous energy. I am wonderin to...

1 year ago | 1 answer | 1

### 1

answerQuestion

How to find the time of the max peak in a signal?

I have a signal data (x) which is 2s long. There is a peack on the signal that I can find with the findpeaks(x) function. I a...

1 year ago | 1 answer | 0

### 1

answerQuestion

How to get residual and other info in eemd?

Hello everyone! I am using the IMF = eemd(y,aim,NR,Nstd) function. I get only IMF info, but when I want to put more out put arg...

1 year ago | 1 answer | 0

### 1

answerQuestion

How to find a value at a certain point/time slot?

Hello everyone! Can anyone help me with finding the value at a specific point/time? For exp. I have a signal to be analyzed, b...

1 year ago | 1 answer | 0

### 1

answerQuestion

How to find max value of a vector in a certain time interval?

I want to find a max value in a spesific time span. For exp. I have a segment of a signal from 26 to 28 s. Does any one know h...

1 year ago | 1 answer | 0

### 1

answerQuestion

What is the unit for measures on the colorbar in Hilbert spectrum?

When applying hht(imf,fs) we get Hilbert spectrum showing a colorbar on the right. I am wonderin to know what the unit for those...

1 year ago | 0 answers | 0

### 0

answersQuestion

What are the measures/scales on the colorbar in Hilbert spectrum?

When applying hht(imf,fs) we get Hilbert spectrum showing a colorbar on the right. What are those values/measures on the color b...

1 year ago | 1 answer | 0

### 1

answerQuestion

How to assign time on x-axis in emd?

I am using the built in function emd(x), but I can't get the time periode I used for the signal, instead there are samples on t...

1 year ago | 1 answer | 0

### 1

answerQuestion

How to plot actual amplitude on the colorbar using STFT (spectrogram)

I am using built in spectrogram function and it automatically plots the power/frequency (dB/Hz) values on the colorbar on the ri...

1 year ago | 1 answer | 0

### 1

answerQuestion

How to plot actual time on x-axis in emd

I am using the built in function for EMD, but I can't get the time periode I used for the signal. Can anyone help me with assig...

1 year ago | 1 answer | 0

### 1

answerQuestion

What is the reference magnitude/amplitude for calculating dB in the power colorbar using STFT?

When plotting a STFT of a signal, the colorbar on the right shows power density in dB. What is the reference magnitude/amplitude...

2 years ago | 2 answers | 0

### 2

answersQuestion

What is the reference for the power/frequency scale bar on the right in Spectrogram?

Dear experts, Can anyone help me how to get the power/frequency scale in Spectrogram using STFT? What is the reference for the...

2 years ago | 0 answers | 0

### 0

answersQuestion

How to plot spectrogram in actual time period?

Does anyone know how to plot actual time interval in Spectrogram using STFT? I want to analyze an event in a signal in a certai...

2 years ago | 0 answers | 0

### 0

answersQuestion

How to plot scalogram in time period?

Hi eveyone! I want to analyze an event in a signal in a certain time span, but using the cwt(x, fs) built in function plots in ...

2 years ago | 3 answers | 0

### 3

answersQuestion

How analyze PMU data in the form of sinusoidal waveform?

Dear experts. I need your help with PMU dataset analysis. I am wondering how to plot sinusoidal waveform if we have PMU data t...

2 years ago | 1 answer | 0

### 1

answerQuestion

power grid 3 phase 230 V dataset analysis

Dear experts, Can anyone help me with analysis of dataset for 3 phase power system with 230 v? How can I apply the Fourier Tran...

2 years ago | 0 answers | 0

### 0

answersQuestion

electric power 3 phase 230 V dataset analysis

Dear members, Can anyone help me with analysis of dataset for 3 phase power system with 230 v within 5 minutes ? The dataset c...

2 years ago | 0 answers | 0

### 0

answersQuestion

Problem with running eemd function

Dear experts, I face issue when implementing the eemd function on a power quality signal (y). It is a bit hard to me to realize...

2 years ago | 1 answer | 0

### 1

answerQuestion

eemd Matlab code for power quality signal analysis

Any one who could share eemd code for PQ signal analysis? Thanks in advance,

2 years ago | 0 answers | 0

### 0

answersQuestion

local domain and global domain

Hi there, Could anyone kindly explain what the "local domain and global domain" is in signal analysis? Aditionally, what does...

2 years ago | 1 answer | 0

### 1

answerQuestion

How to write code for a composite signal with instantaneous frequency

Anyone can help me with writing code for this function?

2 years ago | 1 answer | 0

### 1

answerQuestion

How to apply Hilbert Huang transfer method on the signal Sc(t):

How to run Hilbert spectrum of the following function(signal):

2 years ago | 1 answer | 0

### 1

answerQuestion

How to write code for a function x(t), consist of two sine wave with instantaneous frequencies at different time spot as seen in figure below:

Could any one help me how to write the Matlab code for this function in order to plot the Hilbert spectrum?

2 years ago | 1 answer | 0

### 1

answerQuestion

(emd) How to get script/code from a figure/plot ?

To plot emd for a function (x), I just write a synthetic signal and when I run emd(x), the signal components (imfs) will be sho...

2 years ago | 1 answer | 0