Loop structure inside gnuplot?

Question

Is there any way to iteratively retrieve data from multiple files and plot them on the same graph in gnuplot. Suppose I have files like data1.txt, data2.txt......data1000.tx

Answer 1

Use the following if you have discrete columns to plot in a graph

do for [indx in "2 3 7 8"] {
  column = indx + 0
  plot ifile using 1:column ;  
}