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checked in by marcus, 15 years ago
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r1  svn  20071213 11:10:29 +0100 (Do, 13 Dez 2007)  2 lines
Initial import

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1  command DERIVE <trclist> <algorithm> 

2  ============== 

3  

4  key: compute derivative 

5  

6  Computes derivatives of all traces given by <trclist>. The 

7  input traces remain unchanged. The DERIVE command creates 

8  new traces containing the derivatives. 

9  

10  

11  parameters 

12  

13  <trclist>  parameter type: trace list 

14  List of traces to be derived. These traces remain unchanged. 

15  

16  <algorithm>  parameter type: integer 

17  ID of algorithm used to compute derivative. Valid vales are 

18  1 to 5. The algorithms are listed below (h is sample distance): 

19  1: y'[i] = 1/(2h) (y[i1] + y[i+1]) 

20  2: y'[i] = 1/(12h) (y[i2]  8y[i1] + 8y[i+1]  y[i+2]) 

21  3: y'[i] = 1/h (y[i] + y[i+1]) 

22  4: y'[i] = 1/(2h) (3y[i] + 4y[i+1]  y[i+2]) 

23  5: y'[i] = 1/(12h) (3y[i1]10y[i]+18y[i+1]6y[i+2]+y[i+3]) 

24  

25  

26  Example: 

27  

28  DERIVE 13 3 ! computes derivative of traces 13 by algorithm 

29  ! number 3 

30  

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