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Donald John


Imperial College

Actif depuis 2013

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Accurate frequency estimation with short time series data - maximum entropy methods or Yule Walker AR method?
I am using the <http://www.mathworks.com/matlabcentral/fileexchange/22215-lomb-normalized-periodogram Lomb-Scargle code> to esti...

environ 10 ans il y a | 1 réponse | 0

0

réponse

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FFT of tidal data - problems identifying Mf component in MATLAB
I am running an FFT in MATLAB of some tidal data. I successfully pick up most of the major tidal species, however I can't seem t...

environ 10 ans il y a | 4 réponses | 2

4

réponses

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Filter tailing at gaps and extreme ends of data - how to avoid?
I am using a Butterworth filter to remove the periodic signal from a data series. However at the ends (and at gaps) of the time-...

plus de 10 ans il y a | 1 réponse | 0

1

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Filling data gaps in a periodic timeseries in MATLAB
Thanks for your response. I am going to give both of these methods a try. I'll report back here once I have had a chance to do s...

plus de 10 ans il y a | 0

Question


Filling data gaps in a periodic timeseries in MATLAB
I am looking for a method to fill in data gaps in a time-series that contains periodic data (in this case with a frequency equal...

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

2

réponses

Question


How can I extract the full character string using a FOR loop?
I have an array of water quality values, I set any value that is fit for consumption to zero and only those unsuitable for consu...

presque 11 ans il y a | 1 réponse | 0

1

réponse

Question


Zooming separately on both data sets while using plotyy
Is there anyway that I can selectively zoom on the two data sets when I am using plotyy? In other words I want to re-scale a...

plus de 11 ans il y a | 2 réponses | 1

2

réponses

Réponse apportée
Separating vectors into individual subsets for plotting
Okay, I have two further questions. 1. Is it possible to plot the new cell structure and how would I do this? 2. Can I do ...

plus de 11 ans il y a | 0

Question


Separating vectors into individual subsets for plotting
I have a vector with a series of data values from 0 to 30. I want to split the vector into separate parts so that each data rang...

plus de 11 ans il y a | 5 réponses | 0

5

réponses