controldemo fails at the Nyquist demo on octave-3.0.4RC5 (patched for plotting issue)

[Tatsuro MATSUOKA]

Hello

Sorry for dual posting for this matter.

However it seem to be a different issue from that we are discussing concerning 
issue about plotting.  


I have carried out to test controldemo, in which plot fails in Nyquist analysis 
(Nyquist).
 [ 3] Frequency response functions,  [ 2] Nyquist analysis (nyquist),  [ 1] 
Continuous system nyquist
analysis

Some figures appeared fine but crashes like end of file.
However the origin seems not ot be the same as the prevous fails.

I have used  octave-3.0.4RC5 build by mingw-gcc-4.3.2-dw2-TDM, in which patches 
are applied to clf.m,
legend.m, and graphics.cc.

Does anyone confirm this ?

Regards

Tatsuro



****************************
Example #4,  Nyquist can be used for MIMO systems if the system has
an equal number of inputs and outputs.  Otherwise, nyquist returns
an error.  To examine a MIMO system, systems 2 and 3 will be grouped
[nn,nz] = sysdimensions(sys2);
sys2 = syssetsignals(sys2,"out","y_sys2");
sys2 = syssetsignals(sys2,"in","u_sys2");
sys2 = syssetsignals(sys2,"st",__sysdefioname__(nn+nz,"x_sys2"));
sys_mimo = sysgroup(sys2,sys3);
sysout(sys_mimo);
Input(s)
      1: u_sys2
      2: u_1

Output(s):
     1: y_sys2
     2: y_1

state-space form:
6 continuous states, 0 discrete states
State(s):
    1: x_sys2_1
    2: x_sys2_2
    3: x_1
    4: x_2
    5: x_3
    6: x_4

A matrix: 6 x 6
    0.00000    1.00000    0.00000    0.00000    0.00000    0.00000

  executing
---


 ---- Press a key to continue ---
q

To view the nyquist plots for selected  channels, the command form changes:
Command: nyquist(sys_mimo,[],1,1);
Press a key to execute command  executing
error: mx_el_eq: nonconformant arguments (op1 is 1x6, op2 is 2x1)
error: evaluating binary operator `==' near line 95, column 32
error: evaluating argument list element number 1
error: evaluating assignment expression near line 95, column 16
error: evaluating for command near line 94, column 9
error: evaluating if command near line 93, column 7
error: evaluating if command near line 86, column 5
error: evaluating if command near line 70, column 3
error: called from `sortcom' in file
`d:\usr\Tatsu\mingwhome\octaves\octave-3.0.4RC5\scripts\control\util\sortcom.m'
error: evaluating assignment expression near line 90, column 7
error: called from `zp2ss' in file
`d:\usr\Tatsu\mingwhome\octaves\octave-3.0.4RC5\scripts\control\system\zp2ss.m'
error: evaluating if command near line 111, column 5
error: evaluating if command near line 109, column 3
error: called from `sysupdate' in file
`d:\usr\Tatsu\mingwhome\octaves\octave-3.0.4RC5\scripts\control\system\sysupdate.
m'
error: evaluating assignment expression near line 159, column 9
error: evaluating if command near line 158, column 3
error: called from `sysgetsignals' in file
`d:\usr\Tatsu\mingwhome\octaves\octave-3.0.4RC5\scripts\control\system\sysget
signals.m'
error: evaluating while command near line 137, column 5
error: evaluating if command near line 135, column 3
error: called from `nyquist' in file
`d:\usr\Tatsu\mingwhome\octaves\octave-3.0.4RC5\scripts\control\base\nyquist.m'
error: near line 29 of file
`d:\usr\Tatsu\mingwhome\octaves\octave-3.0.4RC5\scripts\control\util\run_cmd.m'
error: evaluating if command near line 321, column 9
error: evaluating while command near line 308, column 7
error: evaluating if command near line 43, column 5
error: evaluating while command near line 35, column 3
error: called from `frdemo' in file
`d:\usr\Tatsu\mingwhome\octaves\octave-3.0.4RC5\scripts\control\base\frdemo.m'
error: evaluating switch command near line 67, column 5
error: evaluating while command near line 49, column 3
error: called from `DEMOcontrol' in file
`d:\usr\Tatsu\mingwhome\octaves\octave-3.0.4RC5\scripts\control\base\DEMOcontro
l.m'
error: called from `controldemo' in file
`d:\usr\Tatsu\mingwhome\octaves\octave-3.0.4RC5\scripts\control\base\controldem
o.m'



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