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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...

9 years ago | 1 answer | 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...

9 years ago | 0 answers | 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 ...

9 years ago | 1 answer | 0

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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 ...

9 years ago | 1 answer | 0

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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...

9 years ago | 1 answer | 0

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Answered
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...

9 years ago | 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...

9 years ago | 3 answers | 0

3

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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 ...

9 years ago | 2 answers | 0

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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...

9 years ago | 2 answers | 0

2

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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...

9 years ago | 0 answers | 0

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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...

9 years ago | 1 answer | 0

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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...

9 years ago | 0 answers | 0

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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...

9 years ago | 0 answers | 0

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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...

9 years ago | 1 answer | 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...

9 years ago | 1 answer | 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...

9 years ago | 0 answers | 0

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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...

9 years ago | 1 answer | 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 ...

9 years ago | 0 answers | 0

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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; ...

9 years ago | 0 answers | 0

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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...

10 years ago | 0 answers | 0

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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...

10 years ago | 1 answer | 0

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Answered
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...

10 years ago | 0

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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...

10 years ago | 2 answers | 0

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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...

10 years ago | 1 answer | 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...

10 years ago | 0 answers | 0

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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...

10 years ago | 0 answers | 0

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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....

10 years ago | 1 answer | 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...

10 years ago | 1 answer | 0

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Answered
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...

10 years ago | 0

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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...

10 years ago | 1 answer | 0

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