However, spike does not provide an option to align the two series. Thus, I produce 2 graphs, and overlay them
Code: Select all
'2015-08-17 10:20 EV9.20150728
'overlay two graph
wfcreate u 8
series x
series y
x.fill -5, 24, 1, -7, -13, -5, 10, -4
y.fill 35, -4, -3, 2, 4, 3, -7, 24
graph gfx.spike x
gfx.addtext(t) ""
graph gfy.spike y
gfy.addtext(t) ""
gfy.setelem(1) lcolor(red) symbol(circle)
graph gfd.merge gfx gfy
gfd.options size(8,3)
gfd.axis range(-20,40)
gfd.align(1,0,-3.01)
' gfd.align(1,0,-3.02)
' gfd.align(1,0,-3.015)
the problem is that I can not achieve a perfect overlay. The best choice is align(1,0,-3.01), and it seems no different from align(1,0,-3.02) and align(1,0,-3.015).
Is it possible to find out an exact overlay?