[gmx-users] g_covar
Berk Hess
gmx3 at hotmail.com
Wed Jan 9 16:55:17 CET 2008
This is an incorrect warning, which has been introduced in
version 3.3.2. I have corrected the warning for 3.3.3.
Berk.
> Date: Wed, 9 Jan 2008 14:51:52 +0100
> From: tangxuan82 at gmail.com
> To: gmx-users at gromacs.org
> Subject: [gmx-users] g_covar
>
> Dear all,
> When I am using g_covar to calculate the covariance matrix for alpha
> carbons in one subunit of my protein, I get a warning" WARNING number of
> atoms in tpx (929) and trajectory (293401) do not match". 929 is the
> alpha carbon number and 293401 is whole system atom number. In the
> command, I used trr file and tpr file of the whole system. Do I have to
> get a new trr file and tpr file just for these alpha carbons?
> Some information is shown below.
> "Group 0 ( System) has 293401 elements
> Group 1 ( Protein) has 75295 elements
> Group 2 ( Protein-H) has 38096 elements
> Group 3 ( C-alpha) has 4831 elements
> Group 4 ( Backbone) has 14493 elements
> Group 5 ( MainChain) has 19340 elements
> Group 6 (MainChain+Cb) has 23750 elements
> Group 7 ( MainChain+H) has 23963 elements
> Group 8 ( SideChain) has 51332 elements
> Group 9 ( SideChain-H) has 18756 elements
> Group 10 ( Prot-Masses) has 75295 elements
> Group 11 ( Non-Protein) has 218106 elements
> Group 12 ( KCX) has 184 elements
> .
> .
> Group 107 (chO_chV_&_C-alpha) has 929 elements
> Select a group: 107
> Selected 107: 'chO_chV_&_C-alpha'
> Calculating the average structure ...
> trn version: GMX_trn_file (single precision)
> Reading frame 0 time 20000.000
> WARNING number of atoms in tpx (929) and trajectory (293401) do not match
> Last frame 1000 time 30000.000
>
> Last frame 1000 time 30000.000 to ./#average.pdb.17#
> Read 1001 frames
>
> Trace of the covariance matrix: 2.34563 (nm^2)
> 100%
> Diagonalizing ...
>
> Sum of the eigenvalues: 2.34563 (nm^2)
>
> Writing eigenvalues to eigenval.xvg
>
> Writing reference, average structure & eigenvectors 1--1000 to eigenvec.trr
> Wrote the log to covar.log"
>
> Tang
>
>
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