Syntax:
set style spiderplot {fillstyle <fillstyle-properties>} {<line-properties> | <point-properties>}
# Default spider plot will be a polygon with a thick border but no fill set style spiderplot fillstyle empty border lw 3 # This one will additionally place an open circle (pt 6) at each axis plot for [i=1:6] DATA pointtype 6 pointsize 3