# Sohel Rana

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**Content Feed**

Question

Polynomial fit with centering & scaling

Hello, When I plotted the following data and applied polyfit with second order, it showed the warning like: Warning: Polynomial...

2 mesi ago | 3 answers | 0

### 3

answersQuestion

How to get the mean of a staircase graph?

I'm just wondering if it is possible to get the mean of a staircase graph where the values for y-axis are almost same. For examp...

3 mesi ago | 1 answer | 0

### 1

answerQuestion

Separation of Specific Columns from a Text File

I don't know what is wrong in my code to select specfic column from the following data. In my data there are four columns that y...

5 mesi ago | 1 answer | 0

### 1

answerReading a 97-2003 xls file

You could use file extension. Use xlsread ('filename.xls') instead of xlsread ('filename.xlsx') for 97-2003 xls file. It wo...

5 mesi ago | 0

Question

How to fit multiple peaks/dips

I have a set a data where x-axis is the wavelength and y-axis is the intensity. It is seen from the attached image that there ar...

8 mesi ago | 2 answers | 0

### 2

answersQuestion

How to Apply IFFT?

Hi, I have the following code and I did the FFT to convert the signal from wavelength domain to frequency domain? How can I the...

12 mesi ago | 0 answers | 0

### 0

answersQuestion

Application of filtfilt function

I have a mixed singal in time domain. I applied FFT to find the frequency components. Then I used "filtfilt" to filter the indiv...

circa un anno ago | 1 answer | 0

### 1

answerQuestion

Iteration of Ideal Gas Law

Hi, How can I do the iteration for the follwoing Ideal Gas Law? I would like to use the Vn and get the Pn value and compare the...

circa un anno ago | 1 answer | 0

### 1

answerQuestion

Saving Data for Each for loop

Hi, I tried this task several times but don't know why I'm not getting the expected results. Here in the code, I used a signle...

oltre un anno ago | 1 answer | 0

### 1

answerQuestion

Hanning window, interpolation and resampling

Hi, I have a mixed signal that contains three individual signals (see code below). Could you please tell me how could I do the ...

oltre un anno ago | 1 answer | 0

### 1

answerHow to apply Inverse FFT after filtering to get the original signal back?

Hi Star, My apologies for asking tons of questions. I have applied the attached code to reconstruct the signal but could not g...

oltre un anno ago | 0

Question

How to apply Inverse FFT after filtering to get the original signal back?

I have applied FFT on a mixed signal to find its component. Then I used low pass filtering to separate specifc signal component....

oltre un anno ago | 3 answers | 0

### 3

answersQuestion

Extract signal components from mixed signal

Hi, I have signal that is consists of three individual signals. How can I separate these individual signals from the mixed sign...

oltre un anno ago | 3 answers | 0

### 3

answersQuestion

Signal Separation from a Mixed Signal

Hi, I have signal that is consists of three individual signals. How can I separate these individual signals from the mixed sign...

oltre un anno ago | 1 answer | 0

### 1

answerQuestion

Individual Signal Separation from Mixed Signal

Hi, I have a signal 'I' which is consists of three signals. How can I separate those signals from the mixed signal 'I'. I did F...

oltre un anno ago | 0 answers | 0

### 0

answersQuestion

How to find the average peak values and plot?

Hi, I got the attached plot from the code below. I would like to start the graph from 0.3 instead of 0 (y-axis) and then do the...

oltre un anno ago | 1 answer | 0

### 1

answerQuestion

How to get spatial frequency from FFT?

Hi, I have got the first graph based on the following code. How can I get the second graph after performing FFT? I1=0.7; I2=0...

oltre un anno ago | 1 answer | 1

### 1

answerQuestion

Plotting and Save Data for Multiple Variables

Hi, I'm having problems to plot and save data for different variables. The variables in my code are lam, n1 , n2, and r1 where ...

oltre un anno ago | 1 answer | 0

### 1

answerQuestion

How to get Y-values from X-values?

Hi, I have lot of data in excel file where column 1 denotes the X-value and column to denotes the Y-value. I tried to get Y-val...

oltre un anno ago | 1 answer | 0

### 1

answerQuestion

Fitting and smoothing the noisy curve

The attached image shows lot of noise. How can I get smooth graph? I used different types of fittings like polynomial, spline, g...

oltre un anno ago | 1 answer | 0

### 1

answerQuestion

Plotting graph in a certain range

Hi, I have a graph which conatins a lots of peaks within a ceratin range. I would like to plot graphs where each graph will con...

oltre un anno ago | 1 answer | 0

### 1

answerQuestion

How can I get peaks values and distance between them indicated in the figure?

How can I get only the three peaks values corresponding their x-axis values indicated in the figure? And the horizontal distance...

oltre un anno ago | 0 answers | 0

### 0

answersQuestion

Load text file from subfolder

Hello Creative People, I'm facing problems in loading data from subfolders. There is a main folder called "fiber optics" and th...

oltre un anno ago | 2 answers | 0