Re: multiplot: Data vector empty, ignoring plot!

From: Joao Ribeiro (
Date: Wed Jun 05 2019 - 08:51:25 CDT

Dear Adupa,


You need to provide more information about the exact steps that you are taking. We cannot guess what you are doing.


“ Although my simulation was perfect”- I believe that this means that namd terminated successfully, and you can open the log (using vi for example), and the log file looks ok, without any signs of corruption, truncation or you did not append the two simulations in the same log file.


If you did not find any of the points mentioned above, then open VMD, Extensions->Analysis->NAMD Plot. Then File->”Select NAMD Log File” (select your log file)-> Select the quantities that you want to plot->”Plot Selected Data”. If you have a lot of points to plot, this might take some time.


If what I describe doesn’t work, please post the error message in the terminal window or any other message that VMD prints.






João Vieira Ribeiro
Theoretical and Computational Biophysics Group
Beckman Institute, University of Illinois

+1 (217) 3005851


From: <> on behalf of Adupa Vasista <>
Reply-To: <>, Adupa Vasista <>
Date: Wednesday, June 5, 2019 at 8:33 AM
To: Pratik Narain Srivastava <>
Cc: NAMD list <>
Subject: Re: namd-l: multiplot: Data vector empty, ignoring plot!


Yes, I did.


On Wed, Jun 5, 2019 at 6:56 PM Pratik Narain Srivastava <> wrote:

I assume you are using NAMD Plot plugin. Did you actually upload the log file before selecting the quantities and trying to plot them? Please look at the plugin help documentation.


On Wed, 5 Jun, 2019, 6:53 PM Adupa Vasista, <> wrote:

Although my simulation was perfect i am unable to get plots for volume,total3,etc.

in my log file ,i can find data for these quantities.


Thank you

M.Tech,Department Of Chemical Engineering,
IIT Guwahati.
M.Tech,Department Of Chemical Engineering,
IIT Guwahati.

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