Ravanayana: What if Ravana won?

April 21, 2013

What if Ravan had won instead of Ram? What do you people think of it? I think it would have been altogether a different story ...

Women's contribution to the Internet!

August 18, 2012

Whenever we talk of Internet history, big names like Alan Turing, Tommy Flowers and Harold Keen are mentioned who were working at Bletchley Park during the World War II helping to break the encrypted messages used by the German military. However, I couldn’t help but ask myself, “What were the women doing while the men were out inventing the Internet?”

Eat Street Bangalore

August 13, 2012

Undoubtedly a big time foodie, I was starving yesterday night and wanted to have some good food during the weekends (mess food on Saturday nights are really bad). So I thought of exploring some nearby food joints when a friend suggested about the less known 'eat street' (more popularly known as VV puram) in Bangalore.

The Joy of Giving

July 21, 2012

Today when volunteering for "help the needy" initiative by IISc, I was reminded of the wonderful experience I had as a volunteer for the "Notebook Drive" whose objective is providing notebooks, stationery etc. to poor students who otherwise have to drop out of their schools simply because in course of filling their stomachs, they fall short of money to buy notebooks.

Thursday, September 5, 2013

Plotting graphs in NS2 


For graph designing their are many tools in NS2 like xgraph, trace graph, gnuplot etc and in windows environment there is a good graph plotter called sigmaplot. They can be easily downloaded from internet. 
 
For NS2 on Linux, Gnu plot is good and easy. I would recommend you to use gnuplotif using Linux as it is more flexible than tracegraph and xgraph.
 
Fig: Sample Xgraph plot
STEPS for use and design for gnuplot:
 
1. If you are using NS2 on Linux system then GNUPLOT will be there by default. If not available, you can directly install it from ubuntu software center. Alternatively you can download it from
http://sourceforge.net/project/showfiles.php?group_id=2055 
you will need .tar.gz for linux and .zip for windows. 
 
2. Refer to the following links for installation steps:
         http://homepage.mac.com/marco_coisson/gnuplotGUI/getting_gnuplot.html

         http://www.sarcheck.com/gnuplot/billh.htm
 
         http://www.duke.edu/~hpgavin/gnuplot.html   (GNUPLOT TUTORIAL)
 
 
3. After confirming installation, update the environment variable in bash file.
 
4.Following files will be related with your work
    a. Graph.p       (code file for gnuplot)
    b. Graph.tr      (trace file from which gnuplot will take readings for plotting a graph-- you have to take your readings from your code. First column is always X-axis and second column is Y-axis and son on )
    c. Graph.eps     (actual graph image file --can be generated after running the graph.p file --. It is eps file extension. You can only open in linux . If windows you can open it through IRFAN VIEW software  otherwise ADOBE ILLUSTRATOR can also open this file on windows)
 
5. Now put the graph.p file in the folder where your graph.tr file (yours) is available and from terminal window go to that destination and just write GNUPLOT on terminal window you will get GNUPLOT> .
 
6. Please also check the trace file path in Graph.p file. It is necessary to provide file path there in code file.
 
7. Just write GNUPLOT> load "graph.p"
 
8. and you will have a graph. 
 
" Congratulations on your having a graph successfully"
 
9. you can exit from gnuplot through EXIT command.
 
10.For remaining commands for Graph plottiong, you have to explore its tutorial, mailing list for ns2 (I recommend you to join the mailing list of linux.
   Following links can give you much information you need. 
 
     http://t16web.lanl.gov/Kawano/gnuplot/index-e.html
 
     http://www.gnuplot.info/
 
============== SAMPLE FILE FOR GRAPH.P ==============
 



set title "XYZ"
set xlabel "SEC(Seconds) "
set ylabel "BW"
set xrange [0:1300]
set yrange [0:110]
#set multiplot
#set size 0.5, 0.5
#set origin 0.0, 0.5
 

set grid
set boxwidth 20
#plot "/home/XYZ/ns-allinone-2.33/ns-2.33/mygrid/graph/abc.tr"  using 1:2 with lines lt 1 lw 2 title 'My Work'
plot "/home/XYZ/ns-allinone-2.33/ns-2.33/mygrid/graph/abc.tr" using 1:2 title 'Previous Work' with linespoints , \
   "/home/XYZ/ns-allinone-2.33/ns-2.33/mygrid/graph/abc.tr" using 3:4 title 'My Work' with linespoints

   
#set tmargin 0
#set bmargin 0
   
set term post eps enhan "Helvetica" 60   
set out "combine-curve-time.eps"
#set nomultiplot



First row represents X axis and second row represents Y axis
======================================
TRACE FILE format
=====================
10  9
30  12
50  27
70  28
90  33
110  39
130  43
150  44
170  48
190  52
210  57
320  58
330  60
370  65
450  66
470  68
490  75
530  79
550  81
1280  100
=================================
 
Hope this helps.