The keyword 'y_axis', determine which y data to be plotted on this axis.
The keyword 'x_axis', determine which x data to be plotted on this axis.
extend_hz, determine how far to extend interpolated CPMG frequency or spin-Ãlock field strenght.
extend_ppm, determine how far to extend interpolated spin-lock offsets.
interpolate, determine to interpolate dispersion points, or offset.
sr #3124(https://gna.org/support/?3124): Grace graphs production for R1rho analysis with R2_eff as function of Omega_eff.
sr #3138(https://gna.org/support/?3138): Interpolating theta through spin-lock offset [Omega], rather than spin-lock field strength [w1].
