Question


Macros in Matlab - repeating simple instructions
Hi there, I have read on some websites that writing macros for Matlab is not advisable? I am trying to write several as I am ...

meer dan 11 jaar ago | 3 answers | 0

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Answered
Problem with dimensions, filling a matrix in a for loop
sorry guys that is an old code where I had changed variables names the actual code is as follows; clc clear all; ...

meer dan 11 jaar ago | 0

Question


Problem with dimensions, filling a matrix in a for loop
I am trying to work out the root mean square of my data in sections of 2 seconds. However, the dimensions the matrix Az1 etc is ...

meer dan 11 jaar ago | 2 answers | 0

2

answers

Question


Time aligning data - an unusual situation
Hi there I have a rather difficult problem. I am trying to align data from different sensors placed on different parts of a p...

bijna 12 jaar ago | 0 answers | 0

0

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Question


Trying to get rid of a dc offset - tried other methods posted but to no avail
I am applying the FFT function to data from an accelerometer and I have a large spike at 0Hz. I understand that this could be ...

bijna 12 jaar ago | 0 answers | 0

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Question


Peak finder - finding major peaks instead of just the smaller ones
I want to use a peak finder to find the major peaks in my spectrum, however, when I use {pks, locs] = peakfinder() I get all ...

bijna 12 jaar ago | 2 answers | 0

2

answers

Question


Low pass Filter - designing one
Hi there I am currently trying to perform FFT on an acceleration signal. I have values in terms of g values, ie 0.95g etc. I ...

bijna 12 jaar ago | 1 answer | 0

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answer

Question


Problems using trapz() - dimension issue
clc clear all; Az=load('TEXT PILOT CC LANKLE_converted_1.txt'); Az1=Az(:,1);%looking at the velocity in x first A ...

bijna 12 jaar ago | 1 answer | 0

1

answer

Question


velocity from accelerometer using numerical intergration
I have a problem I have a trace from an accelerometer and I want to convert this into velocity I do not major in physics and I w...

bijna 12 jaar ago | 1 answer | 0

1

answer

Answered
Appropriate window from accelerometer data
Also can I also say that my code so far is as follows; x1 = data (from section1 a period of walking and jumping) y1 = x1...

bijna 12 jaar ago | 0

Answered
Appropriate window from accelerometer data
Also would perhaps a low pass filter work?

bijna 12 jaar ago | 0

Answered
Appropriate window from accelerometer data
Also its important for me to add that all my plots from the various sections of data look the same with just large spikes at the...

bijna 12 jaar ago | 0

Answered
Appropriate window from accelerometer data
Hi there I was wondering if you could have a look at the graph I have made from one of the sections from my data. The large spik...

bijna 12 jaar ago | 0

Answered
Appropriate window from accelerometer data
Hi there thanks so much for the suggestion, When I apply this method though I get the error message saying that the dimensions m...

bijna 12 jaar ago | 0

Answered
Appropriate window from accelerometer data
Hi there, I have been thinking about my problem in more depth and have realised that I may need to preprocess my data. Basica...

bijna 12 jaar ago | 0

Question


Appropriate window from accelerometer data
I am attempting to put my data through the fat function however, it seems that due to high spikes at the ends I may need to use ...

bijna 12 jaar ago | 8 answers | 0

8

answers

Question


'load' command - loading and using data from a .MAT file
Hi there I would like to load data from a .mat file but retain it's structure. It is a 17x17x17 matrix and at the moment I am si...

ongeveer 12 jaar ago | 1 answer | 0

1

answer

Question


Spherical harmonics - finding the coefficents of values of ODFs
Hi there, I am very new to the study of spherical harmonics and I was wondering if you could help me. I have values of my ODF...

meer dan 12 jaar ago | 0 answers | 0

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Question


working out the vertices of polyhedra
I am trying to work out the vertices of various sized polyhedra. I want equally spaced points on a sphere of radius one (ie goin...

meer dan 12 jaar ago | 0 answers | 0

0

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Answered
eigenvalues - determining the three major eigenvalues from a matrix
Well I actually would like to work out the principal Eigen vector for a ODF which is in the form of a vector but I'm not really ...

meer dan 12 jaar ago | 0

Question


eigenvalues - determining the three major eigenvalues from a matrix
Is there a code or program I can download which will determine the three main eigenvalues,; t1 t2 and t3 of a matrix as I really...

meer dan 12 jaar ago | 3 answers | 0

3

answers

Question


More sophisticated code than a for loop with i is large
Hi there I am trying to calculate a scatter matrix for some data. so basically my Eigen values are in a matrix of the form; [e11...

meer dan 12 jaar ago | 2 answers | 0

2

answers

Question


while statements - imposing two conditions
Hi there I am trying to impose a while loop with two conditions; while (L2normpercentold>=tol)&&(any(Diffpart1>0.0001)) Howe...

meer dan 12 jaar ago | 2 answers | 0

2

answers

Question


output history and testing convergence
Hi there, I have quite a complicated algorithm running and I would like to test to see if it converges as it is taking a very...

meer dan 12 jaar ago | 1 answer | 0

1

answer

Answered
Problem with ifftn and ifftshift??
Thanks so much for the help! I will try your suggestion! :D

meer dan 12 jaar ago | 0

Question


finding places where an array are equal to zero and replacing them accordingly
I have written some code, however, due to the fact that my alogirthm is really quite complicated it is hard for me to see if my ...

meer dan 12 jaar ago | 1 answer | 0

1

answer

Question


Problem with ifftn and ifftshift??
Hi there I was wondering if someone could help me. I am using the fftn fftshift functions as part of my alogrithm; tmp = fftn...

meer dan 12 jaar ago | 2 answers | 1

2

answers

Question


Indexing problem - how to obtain row and column and use later
If I have a matrix A = [ 1 2 3; 2 3 4; 2 0 8; 4 8 0; 1 2 0; 0 0 0] and I wanted to store the places where the zeros exist and t...

meer dan 12 jaar ago | 1 answer | 0

1

answer

Answered
Comparing data from previous iteration with data from this iteration
Hi there, yes I see the problem with what I was trying to do. I have only used while loops in the context of single value sol...

meer dan 12 jaar ago | 0

Question


Comparing data from previous iteration with data from this iteration
I want to terminate my loop when the difference between two iteration has an L2 norm of less than 0.1% I thought this was done i...

meer dan 12 jaar ago | 2 answers | 0

2

answers

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