RE: bode not working: sys undefined

[Uwe Heinz Rudi Dippel]

From: address@hidden address@hidden

Here is an example:

n=6
d=[1 2 6]
sys=tf(n,d);
sysout(sys)
bode(sys)

This works now, in principle.

Back to the earlier question, the example provided here:

> https://prof.hti.bfh.ch/sha1/Octave/index/f/bode.html

bode(sys,[],"y_3", {"u_1","u_4"});

Is this an explanation or valid syntax? At first sight, it does look like valid 
syntax. But when I run it:
octave:17> bode(sys,[],"y_3", {"u_1","u_4"});
error: sysidx (sigtype = in): Did not find u_4
I have to do more reading, I guess. What puzzles me, is that it complains about 
u_4. Does it evaluate from right to left? Would "u_4" not be simply a string?

Uwe

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