suhistogram.su.main

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char    *sdoc[] = {

 SUHISTOGRAM - create histogram of input amplitudes	        

    suhistogram <in.su >out.dat                                

 required parameters:                                          

 min=    - minimum bin 				        
 max=    - maximum bin 				        
 bins=   - number of bins				        

 optional parameters                                           

 trend=0 - =0 1-D histogram                                    
           =1 2-D histogram picks on cumulate                  
           =2 2-D histogram in trace format                    

 clip=     threshold value to drop outliers                    

 dt=     - sample rate in feet or milliseconds.  Defaults  to  
           tr.dt*1e-3                                          
 datum=  - header key to get datum shift if desired (e.g. to   
           hang from water bottom)                             

 Notes:                                                        
 trend=0 produces a two column ASCII output for use w/ gnuplot.
 Extreme values are counted in the end bins.		        

 trend=1 produces a 6 column ASCII output for use w/ gnuplot      
 The columns are time/depth and picks on the cumulate          
 at 2.28%, 15.87%, 50%, 84.13% & 97.72% of the total points    
 corresponding to the median and +- 1 or 2 standard deviations 
 for a Gaussian distribution.                                  

 trend=2 produces an SU trace panel w/ one trace per bin that  
 can be displayed w/ suximage, etc.                            

 Example for plotting with xgraph:                             
 suhistogram < data.su min=MIN max=MAX bins=BINS |	        
 a2b n1=2 | xgraph n=BINS nplot=1                              


 Author: Reginald H. Beardsley  2006   [e-mail]