plotting transfer function in octave 5.2: How to fix error: set: "dataaspectratio' must be finite

[shall689]

Hello,

I am using Octave 5.2 and control pkg 3.2.0.  When I try to plot the step
response of a transfer funciton, octave is returning error: set:
"dataaspectratio' must be finite.  It also returns "warning:
opengl_renderer: data values greater than float capacity. (1) scale data, or
(2) use gnuplot.

The octave I am using only has two available graphics toolkits: qt and fltk.
graphic_toolkit() returns qt.

What is the best way to fix this issue?  

I don't have Octave on the computer that I am using to type this message, so
I don't have the exact transfer function, so I manually copied the transfer
function (shown below).

4.63e-12s^7+1.346e-07*s^6-0.02167*s^5-632.2*s^4+1.04e8*s^3
+3.035e12*s^2+1.284e16*s+3.225e20
---------------------------------------------------------------------------------------------------------------
6.25e-18*s^8+6.136e-12*s^7+2.875e-7*s^6-0.01399*s^5-448.9*s^4+1.057e8*s^3+3.068e12*s^2+1.293e16*s+3.241e20

Stephen





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