# source:SH_SHM/trunk/help/SPIKING.HLP@16

Revision 16, 2.1 KB checked in by marcus, 15 years ago (diff)

r1 | svn | 2007-12-13 11:10:29 +0100 (Do, 13 Dez 2007) | 2 lines

Initial import

Line
1command SPIKING <trc> <lo-bound> <hi-bound> <reg>
2===============
3
4key: compute spiking filter
5
6Creates spiking filter (inverse wavelet) of a trace window given by
7<trc>, <lo-bound> and <hi-bound>.  The time response function of the
8filter is added to the display.  You can use the "fold" command to
9apply this filter to other traces.
10
11
12parameters
13----------
14
15<trc>  ---  parameter type: trace
16   Trace to compute spiking filter
17
18<lo-bound>, <hi-bound>  ---  parameter type: real
19   Time window on trace <trc> for computation of spiking filter
20
21<reg>  ---  parameter type: real
22   Control parameter of spiking.  The computation is done in time
23   domain using the toeplitz matrix made from the autocorrelation
24   of the specified window.  Before evaluation the diagonal
25   elements of the toeplitz matrix are multiplied by <reg>+1.
26   <reg>=0 means ordinary inversion.  <reg> > 0 means low-frequent
27   inversion (prewhitening).
28
29
30qualifiers
31----------
32
33/pos=<spike-pos>
34   Specifies the spike position of the desired trace in seconds
35   relative to the start of the time window <lo-bound>.  As a
36   default, the spike is positioned at the center of the signal
37   <spike-pos> = sum_i{i*dt*a[i]} / sum_i{a[i]*a[i]},
38   where a[i] are the amplitude values in the window.
39   You also can specify "/pos=max", then the spike is positioned
40   at the maximum amplitude inside the window.
41
42/lth=<lth-fac>
43   Determines the length of the filter trace in units of the
44   length of the specified window.  Default is 0.5, i.e. the
45   filter has half the length of the signal window.
46
47
48examples
49--------
50
51   spiking 1 5.0 50.0 1.0    ! computes spiking filter of trace 1
52                             ! in window from 5.0 sec to 50.0 sec.
53                             ! A control parameter of 1.0 is used
54
55   spiking/lth=1.0 2 *;;0.0  ! computes spiking filter of trace 2;
56                             ! the time window must be selected by
57                             ! graphic cursor.  The output trace
58                             ! has the same length as the selected
59                             ! window.  Control parameter is 0.0.
60
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