I am using evalvid 2.7 and ubuntu 14.04(64bit) and i am trying to plot the mean opinion score.

I used these commands to calculate 2 Peak Signal to Noise Ratio(psnr)whose values are stored in text files.
Afterwards, i have put those 2 files in a directory named "Work" as specified in the way of using the command.
Next, i entered this command to calculate the Mean Opinion Score(MOS)
That result of that command was 4 files named: miv1.txt, miv2.txt, qual.txt located in the Word directory, And mos.txt in the current directory.

The miv1.txt, miv2.txt and qual.txt contain calculated values on 2 columns for about 300 lines(number of frames). And the mos.txt file contain this:

I would like to know what should i do to plot the MOS using those 4 files.
It will be very helpful for me. Thanks !!!

I am not familiar with this program, but following evalid website you might have missed a couple steps. However, look at this page, and the link at the bottom brings up a pdf that explains a lot. There are tables and graphs there that should be able to direct you on how it should look if you were to use a spreadsheet or plotting program.

Hope this helps some.

Thanks @dab1414 for your reply.
I followed your link and i read the pdf. But it didn't really help me. However, i found a tool call Tracegraph which can plot graphs of jitter, end2end delay, throughput and bandwidth. I am studying the tool to know how to plot the Mean Opinion score.