Domanda

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...

oltre 9 anni fa | 1 risposta | 0

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Domanda

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...

oltre 9 anni fa | 0 risposte | 0

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Domanda

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 ...

oltre 9 anni fa | 1 risposta | 0

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Domanda

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 ...

oltre 9 anni fa | 1 risposta | 0

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Domanda

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...

oltre 9 anni fa | 1 risposta | 0

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Risposto
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...

oltre 9 anni fa | 0

Domanda

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...

oltre 9 anni fa | 3 risposte | 0

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Domanda

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 ...

oltre 9 anni fa | 2 risposte | 0

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Domanda

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...

oltre 9 anni fa | 2 risposte | 0

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Domanda

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...

oltre 9 anni fa | 0 risposte | 0

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Domanda

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...

oltre 9 anni fa | 1 risposta | 0

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Domanda

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...

oltre 9 anni fa | 0 risposte | 0

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Domanda

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...

oltre 9 anni fa | 0 risposte | 0

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Domanda

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...

oltre 9 anni fa | 1 risposta | 0

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Domanda

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...

oltre 9 anni fa | 1 risposta | 0

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Domanda

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...

oltre 9 anni fa | 0 risposte | 0

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Domanda

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...

oltre 9 anni fa | 1 risposta | 0

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Domanda

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 ...

oltre 9 anni fa | 0 risposte | 0

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Domanda

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; ...

oltre 9 anni fa | 0 risposte | 0

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Domanda

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...

quasi 10 anni fa | 0 risposte | 0

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Domanda

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...

quasi 10 anni fa | 1 risposta | 0

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Risposto
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...

quasi 10 anni fa | 0

Domanda

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...

quasi 10 anni fa | 2 risposte | 0

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Domanda

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...

quasi 10 anni fa | 1 risposta | 0

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Domanda

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...

circa 10 anni fa | 0 risposte | 0

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Domanda

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...

circa 10 anni fa | 0 risposte | 0

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Domanda

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....

circa 10 anni fa | 1 risposta | 0

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Domanda

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...

circa 10 anni fa | 1 risposta | 0

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Risposto
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...

circa 10 anni fa | 0

Domanda

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...

circa 10 anni fa | 1 risposta | 0

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