Craig Cowled
Queensland University of Technology
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DURCHSCHNITTLICHE ANZAHL DER LIKES
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Frage
importfile regexp thousands separator returns NaN when negative
I used "Import Data" to generate a function importfile for importing a csv file. Unfortunately, the function returns NaN for ev...
mehr als 6 Jahre vor | 1 Antwort | 0
1
AntwortIs it possible to make a manual Nyquist plot using polar(theta,rho)
Jeffrey, I usually keep my data in one complex vector rather than having two vectors (i.e., mag & phase). Then it's a simple th...
mehr als 12 Jahre vor | 0
Frage
how to pass multiple values of x to objective function in GA / Patternsearch
I'm looking for ways to speed up the computation of my optimisation process. I've already used the PROFILE command to pinpoint ...
mehr als 12 Jahre vor | 1 Antwort | 0
1
AntwortGenetic Algorithm options 'PopInitRange' not working
Alan, thank you for such a good explanation. Cleared it up for me nicely.
mehr als 12 Jahre vor | 0
Frage
Genetic Algorithm options 'PopInitRange' not working
I am using GAOPTIMSET to establish an upper and lower bound for my initial population in a GA optimisation. I have abbreviate...
mehr als 12 Jahre vor | 2 Antworten | 0
2
AntwortenHow do you share a variable from another function to be used in a different function?
Cordelle, I'm not going to re-write your code for you, but I will suggest that you read up on nested functions, here ... ht...
mehr als 12 Jahre vor | 0
| akzeptiert
power spectrum VS amplitude of FFT function
Power = 20 * log10(abs(FFT))
mehr als 12 Jahre vor | 0
Restarting Genetic Algorithm after Crash
Many thanks yet again, Alan. Will write a little function to handle the crash and restart the GA. As for patternsearch, I mi...
mehr als 12 Jahre vor | 0
Frage
Restarting Genetic Algorithm after Crash
I'm using the GA to update my Finite Element Model. The fitness function I am using is computationally expensive and takes 4sec...
mehr als 12 Jahre vor | 2 Antworten | 0
2
AntwortenUse of PSD functions to obtain FRFs
I thought I should tie up a loose end with this question. I discovered that the data acquisition from my impact hammer was faul...
mehr als 12 Jahre vor | 1
Curve fitting a complex function using cftool
MattJ, not sceptical ... always worthwhile to know the intrinsic quirks of an algorithm. I used your code and compared the di...
mehr als 12 Jahre vor | 0
Curve fitting problem and strange message
Fei, if the "change in residuals is less than tolerance" then this is an indication that you have a reasonably good fit. I ha...
mehr als 12 Jahre vor | 0
genetic algorithm error not enough input arguments
Hey, what do you know, it worked!! Btw, your recommendation of using LSQNONLIN was the right call too. Although the GA wor...
mehr als 12 Jahre vor | 0
genetic algorithm error not enough input arguments
Alan, Thank you for taking the time to answer this in so much detail! Point taken regarding the choice of optimization too...
mehr als 12 Jahre vor | 0
Frage
genetic algorithm error not enough input arguments
function deltaH = curvefit_H_2modes(w1,w2,m1,m2,c1,c2) load('file.mat'); z = -(x.^2) .* ((1 ./ ((w1.^2 * m1) -...
mehr als 12 Jahre vor | 4 Antworten | 0
4
AntwortenHow to Fix this Error!
Send this to Matlab Support. Obviously their help file has the wrong code.
mehr als 12 Jahre vor | 0
RMS question plss help me
Mohd, if you have the Signal Processing Toolbox, you can use the _rms_ function like this: X = [0.234 0.2338 0.255 3.456 5....
mehr als 12 Jahre vor | 0
Curve fitting a complex function using cftool
I just noticed another question on the forum in which someone suggested to use _mldivide_. I'll have a look at this when I get ...
mehr als 12 Jahre vor | 0
how to acces and change value inside transfer function inside a loop
Kobi, I tried running your code and got an error message. It looks like you missed a space between G.den{1,1} and (k) in the li...
mehr als 12 Jahre vor | 0
| akzeptiert
pseudorandomise vectors in an array
Doug, I use a function that was developed by Jos, called _allcomb_. You can find it at the following link <http://www.mathworks...
mehr als 12 Jahre vor | 0
| akzeptiert
How can I generate random numbers with constraints?
I think you have actually answered your own question. If x = randi([3 18], 7); gives you a 7 x 7 matrix of random numbers betwe...
mehr als 12 Jahre vor | 0
Frage
bar3 width depend on zdata?
Ok, so I know how to make the colours on my bar graph depend on zdata .. h = bar3(data); for ii = 1:length(h) zdata =...
mehr als 12 Jahre vor | 0 Antworten | 0
0
AntwortenBoxplot with time on x axis
Found the answer ... Need to use 'positions' like this boxplot(Y,'positions',X)
fast 13 Jahre vor | 4
| akzeptiert
Excel Date Format to Matlab Number Array
Have you tried using datevec? Take one of the cells as an example ... '02/03/2013'. >> datevec('02/03/2013','mm/dd/yyyy')...
fast 13 Jahre vor | 0
| akzeptiert
Frage
Boxplot with time on x axis
Does anybody know how to obtain a boxplot with time on the x axis? I have collected experimental observations at irregular in...
fast 13 Jahre vor | 1 Antwort | 1
1
AntwortFrage
Curve fitting a complex function using cftool
I'm using the cftool toolbox to find fits for a complex valued transfer function. The toolbox clearly can't handle a complex nu...
fast 13 Jahre vor | 3 Antworten | 0
3
AntwortenFrage
Use of PSD functions to obtain FRFs
Hi, I am doing some modal analysis on a steel structure and have encountered some troubling issues while using Matlab's Power...
etwa 14 Jahre vor | 2 Antworten | 1
