How to write a python program to make Fill to Data Plot directly select Data as Backgnd. My code is:
import os
import originpro as op
wks = op.find_sheet()
graph = op.new_graph(template='XPSArea')
gl=graph[0]
plot1 = gl.add_plot(f'{wks.lt_range()}!(?,5:end)', type = 'l')
plot2 = gl.add_plot(f'{wks.lt_range()}!(?,3:4)', type = 'l')
plot3 = gl.add_plot(wks,1,0,type = 's')
g1 = gl.group(True,0,wks.cols-5)
plot1.set_fill_area(type=8)
# how to select the Backgnd. data?
gl.rescale()