# 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**

Convert time data from excel format to milliseconds.

hello so when we look at the raw time data , it's like a rounded signal after quantization why not simply do a linear fit so...

3 days ago | 0

Filled region between three functions

hello you need to compute the intersections points - for that I am using the function in attachment (intersections.m , found ...

3 days ago | 0

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How do I implement a low pass filter difference equation to filter sample by sample, samplewise

hello see this second order recursion - here used with a step input (works for any input signal) I used the b,a coefficients...

3 days ago | 0

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convert the image sketch in to x,y boundary coordinate

hello try this hope it helps filename = 'image.png'; inpict = im2double(rgb2gray(imread(filename))); [m,n] = size(inpi...

4 days ago | 0

I want to know the method for removing excessive angle data.

hello @재혁 IMO , there is no need to use a for loop to compute 'indind' variable also nanmean is obsolete, you can use mean wit...

4 days ago | 1

How to produce a noise spectrum from an rms velocity specification?

hello maybe this ? here we generate 10 frequencies (sine waves) of 10 periods each I took a simple case where the spectrum ...

4 days ago | 0

Phase difference of two continuous signals.

hello maybe you could use this code once you have splitted the large signal into smaller chuncks x = 0:0.1:30; y1 = sin(x+0...

4 days ago | 0

How to remove sidelobes using fdatool

hello i prefer to use an elliptic filter as it has a steep roll off after the cut of frequency (fc) here's the filter alone...

4 days ago | 1

Auto-completion and smoothing of incomplete 3D ring

hello maybe this ? load('3D ring.mat') x = data.Points(:,1); y = data.Points(:,2); z = data.Points(:,3); %% method 1...

5 days ago | 0

Make the curves more smoother

Hello there are many options to choose from one way is to use matlab's smoothdata Smooth noisy data - MATLAB smoothdata - ...

5 days ago | 0

Loop outputting deleted object?

hello and welcome back again @S I see the added code below figure(4) is a copy paste from some older code , so this line is inc...

5 days ago | 0

Open and reformat data from txt file

hello seems to me there are multiple data sets (71) that are separated by lines having only two values (starting with "50" lik...

17 days ago | 0

Algorythm for Average of excel data

hello again well, this is quite the same as my answer to your other post Please share the algorithm of the particular data s...

17 days ago | 0

Converting entries from array to double from an entire column in a matrix for plotting

hello here you are D=readtable('tempDataTrollhFlygpl.xlsx', 'NumHeaderLines', 10) % anger 10 rubrikrader slik at jeg kan eks...

18 days ago | 1

How to add rows to a blank table, created by an excel import which only contains headers

hello why not this ? I simply used readcell to get the variable names from the excel file then populated the table (tehn you c...

18 days ago | 0

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How can I mirror a plot from a specific x axis.

maybe this ? x=[ 0.00630656 0.00615694 0.00602694 0.00593928 0.0058094 0.00566972 0.00552689 0.00523467 0.00493265 0...

18 days ago | 0

Editing csv data and convert it into a table

i know it's not the cleanest approach , but it works (at least) out = importdata('EnergyLIS.csv'); % cell array % now a bit ...

18 days ago | 2

How to extract data only along a path consisting of multiple longitude and latitude pair points using MATLAB

ok, this is just to expose the principle... still I need from you the correct lon, lat range for the EXTCOFF_model basically , ...

18 days ago | 0

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How is Spectrogram function working?

see my demo code below , which replicates the principle of spectrogram split the signal (with overlap) apply window fft ...

19 days ago | 0

Comparing 2 histograms in a barh-plot

hi seems to me the way you build your y data matters y = 5+[ 5 5;-5 -5]'; NO y = 5+[ -5 -5;5 5]'; YES x = [1 2]; y = 5+[ -...

19 days ago | 1

Multiple shaded spans on a time series plot dependent on a condition for separate time series data

hi see demo code below - hope it helps % dummy data x = 0:99; y = 1 + 0.02*sign(sin(1+x/25 + x.^2/250)) ; % y data y0 = 0...

21 days ago | 0

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Discrete Time Integrator does not integrate every time step

hello hmm, maybe your "blue" spikes are not all perfectly matching the 0.01 s time spacing and then your integrator see no in...

23 days ago | 0

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FFT doesn't give desired frequency response

hello there are different estimators used to compute a transfer function using just the ratio of two FFT is doable but does ...

24 days ago | 0

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Extract Numbers from Mixed string

hello i supposed you wanted to do this : B='single snap detector: 1 S2L:232867 S2R:3151621 S3L:0 S3R:0' % pat=regexpPattern...

24 days ago | 0

How to put linspace data into if statement

Suggestion : theta = linspace(0,2*pi,50); p = pressure(theta); figure; plot(theta, p); ylim([0 3]) function phase = pre...

24 days ago | 1

Plot 3d points in a map

hello not an user an neither an expert of geoplot and alike , but maybe this helps x = [47 50 55 61]; % lat y = [...

25 days ago | 0

Why is matlab printing all number of digit.

your y data have all same value so the plot y scale is zoomed with a huge factor, that's why you get so many decimals in the y ...

25 days ago | 0

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Plot time series of two set of data

hello I started this , but I am unsure about how the dates / time is coded in your data (as I discovered , HadGEM2 has to do w...

25 days ago | 0

Series Filter Loop Error

hello again so I wanted to learn a bit about gammatone filters , so I read this , which I suppose i also from where you starte...

26 days ago | 0

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How to get all values of for loop to make a graph?

@Minh Hoang Walter is right, this is the correct way to implement you idea also E equation must be inside the for loop and in...

26 days ago | 1

| accepted