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From: Dalesio, L. <da...@bn...> - 2010-07-28 12:39:59
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D. Archive/History ================== The archived data points for a given device. Given as a table of timestamped values, containing a rectangular matrix of 5 arrays: Columns: i) the values (double) ii) the times as strings "dd-mmm-yyyy hh:mm:ss" (matlab dateform '0', suitable for datenum); iii) repeat count; iv) the times as numeric timestamps in UNIX system time format v) the pulse id; vi) the count (1 for a scalar and greater than 1 for a waveform-- count may be used to index into the values array for waveforms to extract the waveform values for each sample vii) a flag indicating whether the times represent Daylight Savings Time. For example see [3]. ------------------------------------------------- This sends the entire archive data. The server should be able to compress this into a statistical sample. I would propose: for each sample sample start time - in unix gmt (should convert to ascii in the client side) number of samples first value last value mean high low first standard deviation -------------------------------------------------- |
