Re: impulse() giving error

[Huub]

> Let me guess: You are using Octave.app with g95 on MacOSX 10.6.

MaxOSC 10.5 actually.

> These warnings are due to an outdated version of the g95 Fortran compiler 
> included with Octave.app. You can safely ignore them. The package should 
> install correctly anyway. Note that installation may take up to several minutes 
> (for compiling the Fortran files). You can verify installation afterwards by 
> running some tests: try some of these
>
> test ltimodels
> test h2syn
> test hinfsyn
> test lyap
> test care
> ...

Yup, did well:

octave-3.2.3:6> test ltimodels
PASSES 19 out of 19 tests
octave-3.2.3:7> test h2syn
PASSES 2 out of 2 tests
octave-3.2.3:8> test hinfsyn
PASSES 2 out of 2 tests
octave-3.2.3:9> test lyap
PASSES 3 out of 3 tests
octave-3.2.3:10> test care
PASSES 6 out of 6 tests

and:

octave-3.2.3:11> H=tf([2 1],[4 3])

Transfer function "H" from input "u1" to output ...
      2 s + 1
 y1:  -------
      4 s + 3


impulse(H) gives a nice graph now.

step(H) goes wrong now, though:

octave-3.2.3:13> step(H)
error: A(I): Index exceeds matrix dimension.
error: called from:
error: 
/Applications/Octave.app/Contents/Resources/share/octave/3.2.3/m/plot/stairs.m 
at line 131, column 8
error: 
/Applications/Octave.app/Contents/Resources/share/octave/3.2.3/m/plot/stairs.m 
at line 72, column 2
error:   /Users/huub/octave/control-0.3.0/__timeresp__.m at line 180, 
column 13
error:   /Users/huub/octave/control-0.3.0/step.m at line 36, column 14

With control-1.0.11, it gave a good response.