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linggang87

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Thanks in advance£¡
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http://www.vislab.uq.edu.au/users/manuals/vmd_ug/node180.html

[ Last edited by linggang87 on 2010-1-24 at 21:51 ]
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wuchenwf

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linggang87(½ð±Ò+2):Thanks 1-24 21:48
qasd(½ð±Ò+2):xiexie~ 1-25 20:55
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linggang87

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ÒýÓûØÌû:
Originally posted by wuchenwf at 2010-1-24 21:32:
XDATCAR¾ÍÊǹ켣Îļþ

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wuchenwf

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linggang87(½ð±Ò+3):лл£¬»¹ÍûÏêϸµã~~ 1-25 11:10
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linggang87

Òø³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
Originally posted by wuchenwf at 2010-01-24 22:17:00:
VMDÀïÃæ¾ÍÓÐÃüÁºÜÈÝÒ×£¬Äã¿´Ò»ÏÂ˵Ã÷Êé¾Í¿ÉÒԸ㶨

Çë¸ßÊÖÏÈÀ´°ïÎÒ½â¾öÕâ¸öÎÊÌ⣬Ìû×ÓÀïÃæÁ´½ÓÖеÄÒ»¸öÀý×ÓµÄÔËÐУº
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simulation example script
Here's a longer script which you might find useful. The problem is to compute the RMSD between each frame of the simulation and the first frame. Usually in a simulation there is no initial global velocity, so the center of mass doesn't move, but because of angular rotations and because of numerical imprecisions that slowly build up, the script aligns the molecule before computing its RMSD.        
# Prints the RMSD of the protein atoms between each \timestep        
# and the first \timestep for the given molecule id (default: top)        
proc print_rmsd_through_time {{mol top}} {               
# use frame 0 for the reference               
set reference [atomselect $mol "protein" frame 0]               
# the frame being compared               
set compare [atomselect $mol "protein"]               
set num_steps [molinfo $mol get numframes]               
for {set frame 0} {$frame < $num_steps} {incr frame} {            
  # get the correct frame                 
  $compare frame $frame                        
# compute the transformation                        
set trans_mat [measure fit $compare $reference]                        
# do the alignment                        
$compare move $trans_mat                        
# compute the RMSD                        
set rmsd [measure rmsd $compare $reference]                        
# print the RMSD                        
puts "RMSD of $frame is $rmsd"                }        }
To use this, load a molecule with an animation (for example, $VMDDIR/proteins/alanin.DCD from the VMD distribution). Then run print_rmsd_through_time. Example output is shown here:
vmd > print_rmsd_through_time
RMSD of 0 is 0.000000
RMSD of 1 is 1.060704
RMSD of 2 is 0.977208RMSD
[...]
ÎÒÊ×ÏȰ´ÕÕ˵Ã÷ µ¼Èë$VMDDIR/proteins/alanin. È»ºóÔÚconsole ÔËÐÐÁËprint_rmsd_through_time£¬µ«½á¹ûÏÔʾ measure fit: no atoms selected¡£
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linggang87

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ice_rain(½ð±Ò+1):½±ÀøÌÖÂÛ 1-27 18:27
ÒýÓûØÌû:
Originally posted by linggang87 at 2010-01-25 11:09:19:

Çë¸ßÊÖÏÈÀ´°ïÎÒ½â¾öÕâ¸öÎÊÌ⣬Ìû×ÓÀïÃæÁ´½ÓÖеÄÒ»¸öÀý×ÓµÄÔËÐУº
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simulation example script
Here's a longer script which you might find useful. The problem is to compute the ...

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freer007

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Originally posted by linggang87 at 2010-01-27 14:47:54:

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linggang87

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wuchenwf(½ð±Ò+2):xiexie 2010-01-29 09:34
ÒýÓûØÌû:
Originally posted by freer007 at 2010-01-28 13:53:39:

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wuchenwf

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linggang87(½ð±Ò+2): 2010-01-29 09:47
VMDÒ»°ãÇé¿öÏÂÔÚ·Ö×ÓÄ£ÄâµÄÈËÖÐÓ¦Óý϶࣬ÓÃvasp×öMD±¾À´¾Í²»ÊÇÌØ±ð¶à£¬´¦ÀíXDATCARµÄ¸Ð¾õ¾Í¸üÉÙÁË£¬ËùÒÔÎÒ¾õµÃVMDÒ»°ã»¹ÊÇÄÇЩ×ö¾­µä·Ö×Ó¶¯Á¦Ñ§µÄÈËÓõÄÊ죬½¨ÒéÂ¥ÉϵĶþλȥËûÃÇÄDZßÎÊÎÊ¡£ÁíÍ⣬MSD¡¢RMSDµÄËã·¨²»Ì«ÄÑ£¬×Ô¼º±à³ÌÒ²ÊÇ¿ÉÒԵĠ 

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wuchenwf

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ÒýÓûØÌû:
Originally posted by linggang87 at 2010-01-28 16:44:20:

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