sumax.su.main

su 的源代码库

char    *sdoc[] = {

 SUMAX - get trace by trace local/global maxima, minima, or absolute maximum

 sumax <stdin >stdout [optional parameters] 			

 Required parameters:						
	none								

 Optional parameters: 						
	output=ascii 		write ascii data to outpar		
				=binary for binary floats to stdout	
				=segy for SEGY traces to stdout		

	mode=maxmin		output both minima and maxima		
				=max maxima only			
				=min minima only			
				=abs absolute maxima only      		
				=rms RMS 		      		
				=thd search first max above threshold	

	threshamp=0		threshold amplitude value		
	threshtime=0		tmin to start search for threshold 	

	verbose=0 		writes global quantities to outpar	
				=1 trace number, values, sample location
				=2 key1 & key2 instead of trace number  
	key1=fldr		key for verbose=2                       
	key2=ep			key for verbose=2                       

	outpar=/dev/tty		output parameter file; contains output	
					from verbose			

 Examples: 								
 For global max and min values:  sumax < segy_data			
 For local and global max and min values:  sumax < segy_data verbose=1	
 To plot values specified by mode:					
    sumax < segy_data output=binary mode=modeval | xgraph n=npairs	
 To plot seismic data with the only values nonzero being those specified
 by mode=modeval:							
    sumax < segy_data output=segy mode=modeval | suxwigb		

 Note:	while traces are counted from 1, sample values are counted from 0.
	Also, if multiple min, max, or abs max values exist on a trace,	
       only the first one is captured.					

 See also: suxmax, supsmax						

 Credits:
	CWP : John Stockwell (total rewrite)
	Geocon : Garry Perratt (all ASCII output changed from %e to %f)
	                       (added mode=rms).
      ESCI: Reginald Beardsley (added header key option)
	based on an original program by:
	SEP: Shuki Ronen
	CWP: Jack K. Cohen
      IFM-GEOMAR: Gerald Klein (added threshold option) 

 Trace header fields accessed: ns dt & user specified keys