getUpDownTimes method determines the on/off times for data collection within a
and returns a list containing these times, ignoring
Traces with a duration less than
min_signal as well as data dropouts that are less than
getUpDownTimes(x, min_signal, min_gap)
minimum gap in seconds (default=60)
Stream object returned by
getDataselect contains a list of individual
Trace objects, each of which is guaranteed to contain a continuous array of
data in the
Trace@data slot. Each
Trace also contains a
starttime and an
a period of uninterrupted data collection. Data dropouts are determined by first rejecting any
Traces of duration less than
The temporal spacing between
Traces is then analyzed, ignoring spaces shorter than
This method first checks the SNCL id of each
Trace to make sure they are identical
and throws an error if they are not.
The first element returned is always the
starttime associated the first
Trace. The last element is always the
endtime associated with the last trace. Thus, when the first element is identical to the
starttime of the web services data request this does not necessarily mean that the channel was down before this.
NOTE: Even when data are complete for the duration of the requested timespan, the last element returned may be earlier than the
endtime of the web services data request by up to a second.
A vector of
POSIXct datetimes associated with on/off transitions.
Jonathan Callahan firstname.lastname@example.org
## Not run: # Open a connection to IRIS DMC webservices iris <- new("IrisClient") starttime <- as.POSIXct("2012-01-24", tz="GMT") endtime <- as.POSIXct("2012-01-25", tz="GMT") # Get the waveform st <- getDataselect(iris,"AK","PIN","","BHZ",starttime,endtime) # Determine up/down transitions, ignoring Traces < 3 min and gaps < 5 min upDownTimes <- getUpDownTimes(st, min_signal=180, min_gap=300) # Or just plot them directly plotUpDownTimes(st, min_signal=180, min_gap=300) ## End(Not run)
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.