Excellent example! Thanks! Am 25.05.2020 um 10:07 schrieb Ryo Furue:
define axis/x=1:3:2/units=degrees_east xax define axis/y=1:3:2/units=degrees_north yax let var = x[gx=xax] + 2 * y[gy=yax] set mode grat:dash fill/hlimits=0:4:2/vlimits=0:4:2/lev=(-Inf)(2)(4)(6)(8)(Inf) var shade/hlimits=0:4:2/vlimits=0:4:2/lev=(-Inf)(2)(4)(6)(8)(Inf) var