Changeset 9861


Ignore:
Timestamp:
08/13/10 16:49:31 (14 years ago)
Author:
tbretz
Message:
Added formulas for MHillasExt::fSlope\\*
File:
1 edited

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  • trunk/Mars/NEWS

    r9851 r9861  
    6666      This is the time spread (rms) around the mean of the arrival times.
    6767      It is calulated as
    68          <math>\sqrt{\sum{t_i}/n}</math>
     68         <math>\sqrt{\sum{(t_i-<t>)^2}/n}</math>
    6969   ** MHillasExt.fTimeSpreadWeighted:
    7070      This is the weighted time spread (rms) around the weighted mean of the arrival times.
    7171      It is calulated as
    72          <math>\frac{1}{\sum{n_i}}\sqrt{\sum{n_i^2(t_i-<wt>)^2}}}</math>
    73             or
    74          <math>\frac{1}{\sum{n_i}}\sqrt{\sum{n_i^2t_i^2}+<wt>^2\sum{n_i^2}-2<wt>\sum{t_in_i^2}}</math>
     72         <math>\frac{1}{\sum{w_i}}\sqrt{\sum{w_i(t_i-<wt>)^2}}}</math>
     73   ** MHillasExt.fSlopeSpread:
     74      This is the time spread (rms) around the slope of the arrival times.
     75      It is calulated as
     76         <math>\sqrt{\sum{(t_i-slope*(\cos\delta*x_i+\sin\delta*y_i)-<dt>)^2}/n}</math>
     77   ** MHillasExt.fSlopeSpreadWeighted:
     78      This is the weighted time spread (rms) around the slope of the arrival times.
     79      It is calulated as
     80         <math>\frac{1}{\sum{w_i}}\sqrt{\sum{w_i*(t_i-slope*(\cos\delta*x_i+\sin\delta*y_i)-<dt>)^2}</math>
    7581
    7682 ;trainenergy.C:
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