title: How to add offset to data from file while plotting in gnuplot
body: <p>I want to add an offset to the data from a file which i want to plot using gnuplot. Suppose i want to add an offset of 0.001 to all the data values from file before i plot them . How can i do it in gnuplot without having to rewrite the data file with the offsets.</p>
  
  <p>Thanks.</p>