[Gnuplot-info] Gnuplot-- changing ranges on replot (polar coordinates)?

[Propane13 <joh...@gm...>]

Hello!

I am currently using gp440win32.
For a project, I'm using polar coordinates, and I want to try to make a
graph that has 2 arcs.

Here's my current program:
set angles degrees
#set angles radians
set polar
set size square
set xrange [-10:10]
set yrange [-10:10]
set grid polar
set xtics 1
set polar
plot [0:90] 4
replot [180:270] 5

I get this error:
"Cannot set range with replot"

Ideally, this program would allow me to have 2 arcs drawn.
I can change the "replot" to "plot", and it'll work, but I lose the first
data plot.

I'm guessing this is a constraint on the way the system is set up.

I did some google searching for awhile, and I found out that someone tried
to do something similar, and had a workaround that worked for cartesian
coordinates:
http://objectmix.com/graphics/139526-plotting-part-sinusoid.html

I was wondering if such a solution should also work for polar coordinates?
Or, perhaps there is a way to remove this constraint from gnuplot?

Another solution I guess would be for me to have an equation where:
r=4 0<t<90, 
r=5, 180<t<270
But I haven't been able to get such commands to work successfully.

Does anyone know if I'm doing something simple incorrectly?
Any help would be appreciated.

Note that I tried some searching online, and of the forums before turning
here, as I don't want to waste anyone's time if I could help it.

Best regards,
  -John
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