# Mathieu NOE

### Hutchinson

Engineer - mechanices /ekectronics / signal processing Average matlab user for 20 years now. Professional Interests: signal processing, adaptive control, noise and vibration processing

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**Content Feed**

finding singular outliers in the presence of data with steep changes but not singular

hello this is my result so far it will not look at the data in the first and last 10% of the time vector so thefocus is on t...

1 day ago | 0

Displaying multiple line plots with different y-values on same baseline

hello IMO, the simplest trick is to "normalize" your data by removing y(1) to each individual y array so that all lines start ...

1 day ago | 0

How can I plot frequency vs magnitude of the scalogram?. The input file is the M*N matrix that is a scalogram. Any one help me by providing MATLAB code.

hello the spectrum is either the mean or the peak value along the x direction of S see code example below you can change ...

1 day ago | 0

Matlab mixed IIR Filter

hello try this this can be genralizd for a arbritary sequence of x1 / x2 signals NB that a sampling frequency of 100 Hz is ...

1 day ago | 0

Storing Variables in a loop to out put in a table

hello try this clearvars dt = 0.1;% t increment iter = 9; % iterations for ci = 1:iter time(ci,1) = 1+(ci-1)...

1 day ago | 0

I would like to use matlab to add information from a .dat file to existing MatLab variables

hello try this the text file used for my code is attached hope it helps filename = 'text.txt'; D=readlines(filename);...

1 day ago | 0

How to import odd and even rows from a more than one txt file ?

hello maybe this ? I wasn't sure when you say even / odd rows if we take the first line (x y z) into account or not so cho...

1 day ago | 0

My Spectrogram doesn't look right, and has negative values

hello stft : use option 'FrequencyRange','onesided' to have only positive frequencies (or use spectrogram) also y log scale...

2 days ago | 0

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A figure created within a for loop is not plotted (only the last one is shown)

hello again so there was some figure calls still present in some functions (fun1, fun2 ,...) I cleaned that so you have only ...

2 days ago | 0

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Importing Excel file data and creating variables with the imported data

hello work with tables or structures...(read doc / help sections if your are not familiar with them ) here a starter % Impo...

2 days ago | 0

How to delete text file some perticular lines using Matlab script

hello its' a bit confusing.... in other words you want to keep the lines that contain a certain variable name ? then try thi...

3 days ago | 0

How can I extract capital words from a string

hello this is one solution (for strings) . For char array it's almost the same (you don't even need to convert back from char ...

3 days ago | 0

Drop data from datatime by condition

hello try this this code will remove data that are contiguous and within given bounds (here 24 hrs min and 36 hours max) th...

6 days ago | 1

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Remove matrix from cell array that doesn't fit required matrix size

hello this will remove the unwanted trailing data data =readtable('EURUSD=X.csv') [m,n] = size(data); k = floor(m/20)*20; ...

6 days ago | 0

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plotting 12 graphs for different months

hello I tweaked a bit your code load data_matrix.mat data=SECTION_L; data(:,1:3)=[]; row=9; cleanup=data([1 2 3 row],:);...

6 days ago | 0

nothing assing to my variable that is in if statement

hello you need to index x in the for loop for i = 1:length(x)/2 if x(i) < 0 % here y(:,i) = Gt_new(1) end e...

6 days ago | 0

plot some nodes from an .txt file

hello Alberto here you are ; use function boundary with shrink factor = 1 data = readmatrix('filename.txt'); x = data(:,1);...

7 days ago | 0

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Matlab Audio Filter with changing Frequency

hello again so this is a variable coefficient IIR implementation I used a white noise as test signal, the output signal show...

7 days ago | 0

Easy question - How can I save this variable within the for loop?

hello If I understand correctly , n must be multiple of 10 and that's the only values of interest for A and B, no need to per...

7 days ago | 0

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How can I group my data per hour in order to not over count my shipping data?

hello have to admit I am not super expert in timetables , but I managed to put some code together and test it i am not sur...

7 days ago | 0

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Is there any matlab function to calculate moving mean square error?

hello I doubt that there is a code for that try this : (based on formula) : % dummy data n=300; x=linspace(0,2*pi,n)...

8 days ago | 0

Linear envelope of an EMG signal

hello Ines there is no bug here , the plot is correct vs what matlab is supposed to do when you select 'rms' option, you can...

8 days ago | 0

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Eliminating the noise from the raw data using median filter

hello again is it now smooth enough ? % Remove quiet parts of a signal. clc; close all; clear; workspace; format ...

9 days ago | 1

How to interpolate/resample an irregular dataset into 1 step spacing?

hello Becky try this the second case means you ask interp1 to do extrapolation, as your original x data do not covers the en...

13 days ago | 0

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How to simulate data from txt correctly?

hello I tried to reproduce your problem , but got the right output , not what you show... hope the attached files can help you...

14 days ago | 1

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import a certain text file .txt from a specific folder

hello again for numerical arrays use readmatrix instead of importdata folder = 'C:\Users\Alberto\....'; % folder where the .t...

14 days ago | 0

save .TXT inside a specific folder

hello try this new_folder = 'C:\Users\....\Folder A' A = ; % matrix 200x3 double save(fullfile(new_folder, 'file.txt'), 'A...

15 days ago | 0

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How can I write self-invoking code for hundreds of wav files for the same loop and call those files to matlab?

hello something like this ? this demoes the excellent FEX submission Natural-Order Filename Sort - File Exchange - MATLAB ...

16 days ago | 1

Identify lines that have a repetition (unique function)

hello simply this now the 4th column is your repetition quantity a=readmatrix("file.txt"); [output,ia,ic]=unique(a,'rows'...

17 days ago | 0

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How to compute the correlation coefficient in the two data set.

hello so once we have digitized the picture with grabit , we have two data mat files (attached) available for further processi...

17 days ago | 0