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'sha' displays shaded traces often useful when viewing more than ~50 traces at a time. Use 'wig' option for a traditional wiggle plot. Display the 7 fields contained with each CORRELATION object. List what functions can be used on a CORRELATION object.
#Matlab r2015a end calculation command how to
%> time_str = %> time_num = datenum(time_str) %> ds = datasource('antelope','archive') %> scnl = scnlobject('sta','chan') %> c = correlation(ds,scnl,time_num,-5,10) How to use a correlation object
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#Matlab r2015a end calculation command full
See HELP DATASOURCE and HELP SCNLOBJECT for a full description of these prerequisite tools. Loading a few thousand short traces into a single correlation object is no problem. Once a list of "trigger times" has been defined (in Matlab date format), reading traces can be accomplished with a single command. The waveform object must also be installed. This approach requires that the Antelope toolbox for Matlab be installed. of Alaska Fairbanks % $Date$ % $Revision$ Use traces from the demo datasetįor the purposes of this cookbook example we use the built-in correlation demo dataset of 100 traces drawn from a broadband sensor AU13 at Augustine volcano. % Author: Michael West, Geophysical Institute, Univ. All uses of CORRELATION require that the WAVEFORM toolbox be installed. Since trace handling is carried out with the WAVEFORM toolbox though, any data that can be converted to a WAVEFORM object can be converted to a CORRELATION object, including SAC files. Primary sources are intended to be Antelope and Winston databases. Detailed installation and version notes can be found in can be imported to a CORRELATION object from several sources. At a minimum, read HELP CORRELATION for the basic architecture of a CORRELATION object. Detailed usages can be found for each function with the HELP command. The overarching goal of the toolbox is to provide a set of functions for performing routine manipulations on a large set of waveforms (tens to thousands) which may bare some similarity to each other - cross correlation, stacking, grouping, plotting, interferometry etc. This is a short demonstration of some of the major tools in the waveform correlation toolbox. Coverting waveform and correlation objectsįunction correlationVariables = cookbook(corr).