set output 'y_graph.ps' 
set term postscript color  
set grid 
set key top left 
set xlabel 'fractional length stretched' 
set ylabel 'Force on cord (N) / area of cord (m^2) ' 
set title 'Elastic cord experiment, analyzed for Young_s modulus '
plot [0:0.8][0:7.5E5] 'elastic.dat' using ($3/60.5):(($1*0.001*9.8)/9.87E-6)      ps 2 pt 4 lw 3 t ''  ,   260554+619186*x lw 1 lt -1 t 'linear fit to 0.2-0.8'  
set output 
quit 
