| To: | s-plus user list <s-news@lists.biostat.wustl.edu> |
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| Subject: | AR for short, not equally spaced TS |
| From: | Xao Ping <xao_ping@yahoo.com> |
| Date: | Wed, 22 Jun 2005 10:20:27 -0700 (PDT) |
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Dear All:
I am analyzing a time course microarray experiment. I have only 6 chips taken in the moments of time 1,2, 10, 50, 85, 100 (relative units). I am thinking to apply time series analysis methods, such as AR or ARMA or ARIMA. I have several questions
1. Is it appropriate at all to think about autoregressive methods when the TS are not equally spaced? If the answer is "NO", then are there any alternative approaches?
2. Is it possible to extract any useful information having only 6 data points?
Any relevant experience or advice are highly appreciated
thank you in advance
Xao Ping
R&R Pharmakinetics
Taiwan __________________________________________________ |
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