Re: MatrixPower problem

• To: mathgroup at smc.vnet.net
• Subject: [mg124524] Re: MatrixPower problem
• From: per at RQNNE.invalid (Per Rønne)
• Date: Sun, 22 Jan 2012 07:27:26 -0500 (EST)
• Delivered-to: l-mathgroup@mail-archive0.wolfram.com
• References: <je96q1\$j7o\$1@smc.vnet.net> <jel26f\$ln1\$1@smc.vnet.net> <jf697u\$ge3\$1@smc.vnet.net> <jf8q60\$3i0\$1@smc.vnet.net>
• Reply-to: spam at RQNNE.dk (Per Rønne)

```roby <roby.nowak at gmail.com> wrote:

> Well, this is strangely.
>
> When dou you get the error, as soon as you enter: \$Post :=
> Map[If[MatrixQ@#, MatrixForm@#, #] &, #, {0, Infinity}] &
> or not until you enter some matrix ?
>
> Which version of Mathematica do you use ?

8.04.0 for Students.

But now it says:

In[1]:= \$Post:=Map[If[MatrixQ@#,MatrixForm@#,#]&,#,{0,Infinity}]&
In[2]:= {1,1}
Out[2]= {1,1}

And when I remove the ampersand, all output is preceded with an #-like
character.

Since it is around a week ago since I posted it, I don't recall how I
did it.

> I tested flawless with 7.0, 8.0
>
> You could try to replace infinity by some "sufficient" high integer
> e.g.: \$Post := Map[If[MatrixQ@#, MatrixForm@#, #] &, #, {0, 1000}] &

--
Per Erik Rønne
http://www.RQNNE.dk
Errare humanum est, sed in errore perseverare turpe

```

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