only use "r" axes when users don't define specifc limits
only use "r" axes when users don't define specifc limits

thongsav-usgs/gsplot,USGS-R/gsplot,jread-usgs/gsplot,ldecicco-USGS/gsplot,lindsaycarr/gsplot,jread-usgs/gsplot,jiwalker-usgs/gsplot,jiwalker-usgs/gsplot,thongsav-usgs/gsplot,aappling-usgs/gsplot,lindsaycarr/gsplot,dpattermann-usgs/gsplot,dpattermann-usgs/gsplot,aappling-usgs/gsplot,ldecicco-USGS/gsplot