I used the command g_hbond to find h-bond between  residues 115-118 and
water. Then I used g_analyze to find out the average and it gives the value
for the hbonds like this :-

                                  std. dev.    relative deviation of
                       standard       ---------   cumulants from those of
set      average       deviation      sqrt(n-1)   a Gaussian distribition
                                                      cum. 3   cum. 4
SS1   6.877249e-02   2.546419e-01   5.092839e-03       2.181    3.495
SS2   6.997201e-02   2.673450e-01   5.346901e-03       2.421    5.001

When I calculated the average manually, by taking the average of numbers in
second column of hbnum.xvg file, I got a value of around 13.5.. What is the
reason for such a large difference.

In another case, g_analyze gives avg values of aroun 6.9 for hbond between
two residues and when I calculated it maually I got the avg values as 6.8

Whats the meaning of SS1 and SS2,?? Does it mean that SS1 refers to time
and SS2 refers to hbond numbers in the hbnum.xvg obtained from g_hbond
analysis ??

Please clarify these doubts..

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