24 lines
		
	
	
		
			421 B
		
	
	
	
		
			Plaintext
		
	
	
	
	
	
			
		
		
	
	
			24 lines
		
	
	
		
			421 B
		
	
	
	
		
			Plaintext
		
	
	
	
	
	
subroutine flat1(savg,iz,nsmo,syellow)
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  real savg(iz)
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  real syellow(iz)
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  real x(8192)
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  ia=nsmo/2 + 1
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  ib=iz - nsmo/2 - 1
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  nstep=20
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  nh=nstep/2
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  do i=ia,ib,nstep
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     call pctile(savg(i-nsmo/2),nsmo,50,x(i))
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     x(i-nh:i+nh-1)=x(i)
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  enddo
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  x(1:ia-1)=x(ia)
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  x(ib+1:iz)=x(ib)
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  x0=0.001*maxval(x(iz/10:(9*iz)/10))
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  syellow(1:iz)=savg(1:iz)/(x(1:iz)+x0)
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  return
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end subroutine flat1
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