Path: csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!weretis.net!feeder4.news.weretis.net!eternal-september.org!feeder.eternal-september.org!.POSTED!not-for-mail
From: Joe Riel <joer@san.rr.com>
Newsgroups: comp.soft-sys.math.maple
Subject: Re: Test for Matrix type
Date: Fri, 23 Sep 2011 07:45:17 -0700
Organization: A noiseless patient Spider
Lines: 39
Message-ID: <87fwjn2u82.fsf@san.rr.com>
References: <9e32joFto3U1@mid.individual.net> <j5i3dm$qsf$1@news.albasani.net>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Injection-Info: mx04.eternal-september.org; posting-host="7daQ3AF9ALJlnU9jGWSG5Q"; logging-data="15449"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX18j3HT9Shjuj7SvhPZfeZct"
User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.3 (gnu/linux)
Cancel-Lock: sha1:SHUybXfNdWg3I4mMGZ4GkUnSKbY= sha1:OpKhemy8h7HuhDOlqn2jo6Fdy84=
Xref: x330-a1.tempe.blueboxinc.net comp.soft-sys.math.maple:248

rouben@shady.(none) (Rouben Rostamian) writes:

> In article <9e32joFto3U1@mid.individual.net>,
> Rainer Rosenthal  <r.rosenthal@web.de> wrote:
>>restart:
>>with(LinearAlgebra):
>>A := Matrix([[1,2],[3,4]]);
>>if type(A,integer) then
>>   print("I'd be suprised");
>>else
>>   print("I thought so.");
>>fi;
>>if type(A,MatrixType) then
>>   print("I'd be glad");
>>else
>>   print("Oops, why not?");
>>fi;
>>
>>Is there a nice substitute for "MatrixType"?
>
> Yes, try "Matrix", as in:
>
> if type(A,Matrix) then
>    print("I'd be glad");
> else
>    print("Oops, why not?");
> fi;

For the first conditional, use the following form (see ?type,Matrix):

if type(A,'Matrix(integer)') then
   print("I'd be suprised");
else
   print("I thought so.");
fi;
            "I'd be surprised"

-- 
Joe Riel