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Mysterious failure of simple statement
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E. Rietsch
Feb 10, 2012, 5:03:05 PM2/10/12
to
Hi,
The following three-line script
c=[1 0];
P=[0.01 0.02 ; 0.02 0.04];
K = c*P*c’;
fails with the message
K = c*P*c' ?; !--error 10
Inconsistent multiplication.
I am running Scilab 5.2
Does anyone know what the problem is?
Cheers,
E. Rietsch
The following three-line script
c=[1 0];
P=[0.01 0.02 ; 0.02 0.04];
K = c*P*c’;
fails with the message
K = c*P*c' ?; !--error 10
Inconsistent multiplication.
I am running Scilab 5.2
Does anyone know what the problem is?
Cheers,
E. Rietsch
Helmut Sennewald
Feb 11, 2012, 2:06:53 AM2/11/12
to
I tried with Scilab-5.3.3 on WIN-XP 32bit.
It worked without any problem.
->K
K =
0.01
Best regards,
Helmut
Francois Vogel
Feb 11, 2012, 3:31:33 AM2/11/12
to
E. Rietsch said on 10/02/2012 23:03:
>
> K = c*P*c’;
What kind of apostrophe are you using here to transpose the c vector?
This will work with K = c*P*c'
F.
>
> K = c*P*c’;
What kind of apostrophe are you using here to transpose the c vector?
This will work with K = c*P*c'
F.
E. Rietsch
Feb 11, 2012, 8:45:59 AM2/11/12
to
I use the standard apostrophe (not the "back" apostrophe).
I run Windows 7 (32 bit) and tried it with Scilab 5.2.1, Scilab 5.2.2,
and Scilab 5.3.1
Incidentally, the computation works if I break it into two statements:
a=c*P;
K=a*c';
I run Windows 7 (32 bit) and tried it with Scilab 5.2.1, Scilab 5.2.2,
and Scilab 5.3.1
Incidentally, the computation works if I break it into two statements:
a=c*P;
K=a*c';
Jean-Pierre Vial
Feb 11, 2012, 9:20:41 AM2/11/12
to
Le 11/02/2012 14:45, E. Rietsch a écrit :
> I use the standard apostrophe (not the "back" apostrophe).
> I run Windows 7 (32 bit) and tried it with Scilab 5.2.1, Scilab 5.2.2,
> and Scilab 5.3.1
>
in your first message
> I use the standard apostrophe (not the "back" apostrophe).
> I run Windows 7 (32 bit) and tried it with Scilab 5.2.1, Scilab 5.2.2,
> and Scilab 5.3.1
>
the first apostrophe is ascii 7E (hexadecimal, 126 decimal)
in the error message, if you look closely, you will see that the design
and spacing is slightly different: this apostrophe is ascii 27
(hexadecimal, 39 decimal) this is the ordinary ascii apostrophe.
If you copy and paste the K=c*P*c' from the error message, it
will probably work (it does for me, on Linux)
scicoslab has no problem with the original formula (on linux)
E. Rietsch
Feb 11, 2012, 5:15:43 PM2/11/12
to
Good eyes. You nailed the problem.
This problem was actually passed on to me by a friend, and I copied the
relevant parts of the code to reduce it to as few statements as
possible. I missed the different apostrophe.
Thank you very much.
This problem was actually passed on to me by a friend, and I copied the
relevant parts of the code to reduce it to as few statements as
possible. I missed the different apostrophe.
Thank you very much.
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