Mathieu NOE

Hutchinson

Last seen: Today | Aktiv seit 2015

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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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Get the Isocline from a know levelset plot (Contours) and the function output (Height)
here a demo if you have one isocline , here I assumed we want only the outer portion (there could be also an inner isocline at s...

etwa 2 Stunden vor | 0

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How to avoid the overshoot in Jiles Atherton hysteresis loop
hello I am just trying to remove the spikes (with filloutiers) and further smooth the curve with a touch of smoothdata look a...

etwa 3 Stunden vor | 0

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Find intersections of two sin wave function
hello why not using this function available from Fex : Fast and Robust Curve Intersections - File Exchange - MATLAB Central ...

etwa 10 Stunden vor | 0

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Need to record multiple arrays within a while loop
indexing is what you need clear, clc year=0; salary=60000; poverty=19720; protected=poverty*2.25; while year<20 k = ...

ein Tag vor | 0

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How to do 'cos' curve fitting for data obtained.
hello you can do a cos/sin series approximation , using this simple code : here I opted for 6 terms : x_axis = [linspace(0...

ein Tag vor | 0

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how to plot the fundamental harmonic wave from given Data
@Abdullah hello here you have 4 periods of signal for theta range of 2pi , so order = 4 load('FluxDensity.mat') %%%%%%%%%%...

ein Tag vor | 0

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Create contour plot from scatter plot
hello sure you can do that notice that I needed to create lot of levels to display the outer contour line because your z dat...

2 Tage vor | 0

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How to read all the files in a folder based on file name?
hello you can do a for loop to load all your files I am not sure what your issue is, but if it's how to make sure to load fi...

2 Tage vor | 0

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How can I plot the complete two circles vertical not horizontal ?
hello either you swap x and y data in your plot calls , or use view : figure(1),plot(sin((0:0.1:3*pi))) legend('original da...

3 Tage vor | 0

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How do I interpolate and smoothen ndvi time series?
hello so I simply replace the 8th column with NaN and replaced them using fillmissing2 data = readtable('sample_ndvi.csv'); ...

3 Tage vor | 0

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Error using tsa function - Error using matlab.internal.math.interp1 Sample points must be unique.
hehe there is only one difference between the two mat files , but it was enough to create the issue >> load('TSA_DATA_OLD.mat...

6 Tage vor | 1

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Blend two bezier curve using partition of unity property while ensuring interpolation
hello seems to me there is a simple solution to your problem - simply combine x,y data of both curves and use unique to remove...

7 Tage vor | 1

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How can I smooth this data before assigning a spline to it?
hello you could do this just using basic interpolation (in log scale) and the regular smoothdata (use your own spline smoo...

7 Tage vor | 0

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How to plot an Implicit function with certain conditions
hello @Shai Zipori I have to say I don't do much with implicit function problems , tried using fsolve and fminbnd but was lacki...

7 Tage vor | 2

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How to turn S11 to time domain by Matlab
hello again I am mot sure to understand the shape of the impulse response from your S11_time.txt file : why only two positive...

8 Tage vor | 0

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Interpolation using data from excel sheet
hello I interpreted your request as : pick one month (from 1 to 12) then define whatever latitude query , and do the interpola...

8 Tage vor | 0

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Plotting a faired curve through a data set that curves in on itself
hello experimental airfoil data can exibit some randomness especially at high angle of attack (stall) we usually prefer to s...

9 Tage vor | 0

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Hi, i want to plot two columns of values of data from excel, the graph includes a zero while the excel sheet doesn't. Here is my code and the graph I got vs what I should get
hello again so your arrays contains 0 after row 22 til the end, that's why your plot goes back to the origin point (this was a...

9 Tage vor | 0

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How can I get more divisions in x- and y- axes scaling when plotting with imagesc to have a clear picture and introduce the proper scaling along x- & y- axes?
hello simply specify the number of points when you call linspace here I introduced N = 500 (N = 100 by default) N = 500; [x...

10 Tage vor | 0

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Clean noisy data from images
hello this is a simple exponential fit using polyfit I had to do a bit of manual tweaks first to slect the appropriate data ...

10 Tage vor | 0

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Fit gaussian to X-Y data (one X column, multiple Y column), for each Y column from an excel file.
coming late in the show try this ... if your data is "good" you can this this result , otherwise the fit may not allow any F...

20 Tage vor | 1

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draw the amplitude-frequency characteristic curve of a particular transfer function
Simply used your info and coded in matlab you have now here the right half of the plot , if you need both negative and positiv...

20 Tage vor | 0

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How to fix my linear fit model?
yet another simple solution, using fminsearch (the no toolbox solution) % data laser = [0 1 2 3 4 5 6 7 8 10 11 12 13 14 15 16...

20 Tage vor | 1

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How to fix my linear fit model?
hello simply change your equation for the second part with a x shift rajaarvo = @(I) 0.1*I.*(I>=0 & I<18)+25*I.*(I>=18 & I<=...

22 Tage vor | 1

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Plot change in velocity
hello again we could use gradient or the function provided below then all vectors are of same size (101 samples) which allo...

22 Tage vor | 0

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How can I fix "Index in position 2 exceeds array bounds" in for loop?
hello to make your code work, b should be initiallized with same dimensions as a (as a vector, not just one scalar) also it's...

22 Tage vor | 0

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Identify local minima in 3D plot/coordinate data
hello this is what you need : Find local minima - MATLAB islocalmin - MathWorks France try this load('sampledata.mat') ...

22 Tage vor | 0

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Environmental data band-pass filter
it's me again :) ! I'm just guessing, maybe this is what you wanted (baseline correction) clc clear; data_datalog = load('...

23 Tage vor | 0

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How do I count the number of times my graph crosses two separate lines?
hello maybe this ? the second plot shows the valid points (Ncounts = 4) % dummy data n = 5000; x = 50*(0:n-1)/n; y = -...

23 Tage vor | 0

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How to combine two data file in one file?
hello try this : IQ_data = [2756.00000000000 - 1252.00000000000i 2681.00000000000 - 992.000000000000i 2540.00000000000 - 6...

23 Tage vor | 0

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Mathieu NOE

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