Question

TYPE_LINEAR_ACCELERATION - How to use in MATLAB
I Have been looking for an effective way to remove the gravitational acceleration from all axis of an accelerometer that is rota...

presque 10 ans il y a | 1 réponse | 0

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Question

effect of filter on my signal
I have a signal that oscillates about 12. I want to filter out noise and just zone in on the main peak so I used a butterworth f...

presque 10 ans il y a | 1 réponse | 0

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Question

Phase difference of two graphs
Is there a function in MATLAB that will give me a value for the phase DIFFERENCE between two graphs. Also if I have created two ...

presque 10 ans il y a | 1 réponse | 0

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Question

Want to retain location in a histogram plot
I have plotted a histogram using the hist function in MATLAB however, I want to find out the original location of the values in ...

environ 10 ans il y a | 1 réponse | 0

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Question

Rotate a plot whilst keeping axes the same
Hi there I was wondering if you could tell me how to rotate a plot. I want my axes to the same I want the plot to moveand ro...

environ 10 ans il y a | 1 réponse | 0

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Réponse apportée
FFT function in matlab
Hey everyone, Well I am playing aound with fourier synthesis and using my spectrum as a guide. I understand that I need to su...

environ 10 ans il y a | 0

Question

FFT function in matlab
Hi i just wanted to check out something regarding the fft function in matlab? Does the spectra produced by the fft functi...

environ 10 ans il y a | 3 réponses | 0

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Question

Splitting a vector up into unequal sections seperated by zeros
Hi everyone I was wondering if someone could help me split up a vector into sections seperated by zeros. I have alot of data ...

environ 10 ans il y a | 2 réponses | 0

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Question

Splitting up a vector into a matrix
Is there a sophisticated way of doing the following; I have a vector = [ 1 ; 2 ; 3 ; 4 ; 6 ; 10 ; 3 ; 5 ; 3 ] I would like...

environ 10 ans il y a | 2 réponses | 0

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Question

Confusion using cumtrapz for acceleration
I have data for a person swinging their leg back and forth, I have this data in the form of acceleration. I have tried using cum...

environ 10 ans il y a | 1 réponse | 0

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Question

Problems using mmreader with struct
I am trying to use mmreader to upload a video into MATLAB. I am trying to follow the example in the documentation, however at th...

environ 10 ans il y a | 1 réponse | 0

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Question

Varying Shape extraction from data
I have some data and it traces out a shape of sorts. It varies dynamically however and I am hoping to work out the average shape...

environ 10 ans il y a | 1 réponse | 0

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Question

Peak filter - trouble using a peak filter to amplify my peak
I am trying to use a peak filter to amplify my peak but for some reason I get an error message ??? No appropriate method, pr...

environ 10 ans il y a | 1 réponse | 0

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Question

Yulewalk filter - Problems with cleaning spectra
I have decided to use a yulewalk filter to clean up my spectra I would like to zone in on three peaks but I am unable to do this...

plus de 10 ans il y a | 1 réponse | 0

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Question

Make a vector of 1's and zeros
I could like to make a matrix consisting of 1's and zeros at certain points. I have a vector that is made up of two other vector...

plus de 10 ans il y a | 1 réponse | 0

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Question

comb filter - when peaks are not equidistant
I am trying to use a comb filter to clear up my spectra, I would like to get a spectra with peaks that are 20% or more of the ma...

plus de 10 ans il y a | 1 réponse | 0

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Question

time aligning two signal at different sample rates
Most of the techniques I have discovered to time align two signals requires them to be sampled at the same rate. I am aware of t...

plus de 10 ans il y a | 1 réponse | 0

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Question

Frequency band - how to determine this using matlab
I am trying to use a frequency domain technique in order to find displacement from accelerator data I am trying to Convert the ...

plus de 10 ans il y a | 1 réponse | 0

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Question

Integration of accelerations to produce spatial displacement
I am doubly integrating accelerations from a device in order to determine the displacement graph. I have written this code; ...

plus de 10 ans il y a | 1 réponse | 0

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Question

Normalising spectra - pwelch method
I am trying to normalise some frequency spectra that I have created using the FFT. I was wondering how it is done with the pwelc...

plus de 10 ans il y a | 1 réponse | 0

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Question

Setting your own threshold for a heatmap
I am trying to create a heat map for my data and I was wondering how I can change the thresholds so that I can input values that...

plus de 10 ans il y a | 1 réponse | 0

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Réponse apportée
Problems with ifft in general
Hi there both! Man apologies for not supplying enough information! So OK my signal is of someone running and so the spectra orig...

plus de 10 ans il y a | 0

Question

Problems with ifft in general
I am having great difficulty using ifft. Basically when I use it on my original spectrum I do indeed get back to my original sig...

plus de 10 ans il y a | 2 réponses | 0

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Question

reversing the hamming window
How can I reverse the effect of the hamming window on my signal. I know some transform can be inversed by the use of i ie ifft e...

plus de 10 ans il y a | 1 réponse | 0

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Question

Spectral purity - How can this be caulated in matlab?
Hi there I was wondering if there was an easy way to calculate spectral purity in MATLAB? I have the signal analysis toolbox but...

plus de 10 ans il y a | 1 réponse | 0

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Question

Area under the peak, clean peak
Hi there folks I am toying with ideas about how to best define the cleanness of a peak. I have some frequency spectra that is...

plus de 10 ans il y a | 1 réponse | 0

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Question

Macro help writing fucntion in matlab
Hi there, I know that this is such a simple question but I have read and reread the Q&A section etc and I cant find any help....

plus de 10 ans il y a | 1 réponse | 0

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Question

Saving multiple figures to a named folder
Hi there I am running a function using several macros for example function fftval(in,out) x = load(in); % or importdata...

plus de 10 ans il y a | 1 réponse | 0

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Réponse apportée
Macros in Matlab - repeating simple instructions
Hi guys Thanks so much for the help I also wanted to check something say for example I wanted to plot a graph of y = sin(x) f...

presque 11 ans il y a | 0

Question

relative peak height - background
I have a spectrum and I am trying to find the relative height of the biggest peak. I was wondering if Matlab had an inbuilt func...

presque 11 ans il y a | 1 réponse | 0

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