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Re: How to extract sequenced data from an array?
From: |
new_user |
Subject: |
Re: How to extract sequenced data from an array? |
Date: |
Wed, 22 Dec 2010 21:48:02 +0100 |
> Take a look here.
> http://en.wikipedia.org/wiki/Cross-correlation
> What autocorrelation is doing is sliding (lag) 1 step at a time, a copy of
> the original past the original, and then testing to see if they are the
> same(correlated).
> [...]
> So if you jump by 10 you could completely miss the important point.
Thanks for cross-correlation explanation. It looks interesting, I haven't met
this technique yet. I'll continue with this adventure tomorrow
> From your picture you sent the center point is when they are lined up, and
> yes you can throw away all to the left of this.
> The center point is about 30000 and there is a peek at 40000 so the period
> might be 10000 samples long, But if you just did ever 10'th data point then
> you might have missed the important points.
> I hope this is helpful
> if you have too many data points, would it be valid to sample less often? If
> you use ever 10'th point then it is like sampling at 1/10 of the rate.
> Doug
Picture I posted is perfect symmetrical graph with center in data point number
center, which is 1/10 of all data, as I used "every 10". I don't know if I
should write about cross-correlation as I just said I didn't know about it, but
shouldn't missing data be of minor relevance because we are talking about
correlation? I mean are exact data values must for this method?
- Re: How to extract sequenced data from an array?, (continued)
- Re: How to extract sequenced data from an array?, new_user, 2010/12/22
- Re: How to extract sequenced data from an array?, Andy Buckle, 2010/12/22
- Re: How to extract sequenced data from an array?, new_user, 2010/12/22
- Re: How to extract sequenced data from an array?, Doug Stewart, 2010/12/22
- Re: How to extract sequenced data from an array?, Andy Buckle, 2010/12/22
- Re: How to extract sequenced data from an array?, fork, 2010/12/22
- Re: How to extract sequenced data from an array?, new_user, 2010/12/22
- Re: How to extract sequenced data from an array?, fork, 2010/12/22
- Re: How to extract sequenced data from an array?, new_user, 2010/12/22
- Re: How to extract sequenced data from an array?, Doug Stewart, 2010/12/22
- Re: How to extract sequenced data from an array?,
new_user <=
- Re: How to extract sequenced data from an array?, Doug Stewart, 2010/12/22
- Re: How to extract sequenced data from an array?, Francesco Potortì, 2010/12/23
- Re: How to extract sequenced data from an array?, Sergei Steshenko, 2010/12/22
- Re: How to extract sequenced data from an array?, new_user, 2010/12/22
- Re: How to extract sequenced data from an array?, Doug Stewart, 2010/12/22
- Re: How to extract sequenced data from an array?, Przemek Klosowski, 2010/12/22
- Re: How to extract sequenced data from an array?, Kim Hansen, 2010/12/31
- Re: How to extract sequenced data from an array?, Ghostly, 2010/12/31
Re: How to extract sequenced data from an array?, veryhappy, 2010/12/23