title: How to label vector in gnuplot
body: <p>I would like to know how to give a label at the end of a vector in gnuplot. I know it is possible to use "set" in gnuplot to show a certain label at some place, but I have hundreds of vectors to draw, and I want to show the index of each vector at its end, e.g., "Node n". Thus I wonder if it is possible to show the labels with incremental index in "one step" with corresponding vectors. </p>
  
  <p>My OS is Ubuntu 13.04 32bit version. Thanks for any advice! </p>