Make/N=1000/D rx,ry
Variable/G xzero=500
Variable/G fwhm=100
rx := x
ry := exp(-((x - xzero)/fwhm)^2)
display ry vs rx
SetVariable setvar0 fsize=16
SetVariable setvar0 size={150,50}
SetVariable setvar0 font="Arial", value=fwhm
SetVariable setvar1 fsize=16
SetVariable setvar1 size={150,50}
SetVariable setvar1 font="Arial", value=xzero