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Re: Errors im Mathematica??

• To: mathgroup at smc.vnet.net
• Subject: [mg29429] Re: [mg29407] Errors im Mathematica??
• From: Maryvonne Teissier <my.teissier at cybercable.fr>
• Date: Tue, 19 Jun 2001 05:35:44 -0400 (EDT)
• References: <200106180739.DAA14299@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

Hi,

Some opinion about your first "error in Mathematica".
I do not consider that requiring the sign of ponctuation " ; "
in a composite command is an error.
You have this sort of necessity in a lot of languages.

In my teaching, I force my students to NOT use the facility
of multiple printing by a multiple order  , I mean by this term
a composite order without the separator " ; ",
because
1) this will be not allowed in Module,
2) this will be not allowed in a direct use of the Kernel ,
3) this will induce less attention to separate cells
in reception of Mathematica  e-mails,
4) that is source of execution errors as you express it .

I appreciate a lot the permissivity of Mathematica , and for example
write 2x  instead of 2*x or 2 x and i know this can induce error
when you write " ax " thinking to " a x ".
If,  in  this case I prefer freedom
I dont hesitate to limit  the liberty
in this special case of lake of punctuation.
But I would appreciate the opinion of others users
about these " lazy composite orders "

Sincerly, Maryvonne Teissier




Hermann Schmitt a *crit :

> I worked with Mathematica very intensively, lately, and encountered
> several - partly strange - problems:
> 1) In functions Mathematica somtetimes tries to multiply statements with
> each other, which follow one after the other in different lines. This
> seems especially the case with Print statements. The problem disappears,
> if I put ";" behind the statements. I think, this is a consequence of
> the fact, that the multiplication sign may be omitted.
> 2) Error messages have no newline behind them, therefore the following
> output of the program is appended to the end of the error message on the
> same line.
> 3) Using the "ToExpression" statement I often get the error message,
> that the argument is not a string, although it is a string.
> Mathematica seems to replace parts the argument by similar statements in
> the program, before it makes the source to a part of the program. In one
> case, I tried to remove the statement in the program and got the error
> message:
> The text replaced was not a string.
> Hermann Schmitt

• Follow-Ups:
  • Re: Re: Errors im Mathematica??
    • From: "Hermann Schmitt" <schmitther@netcologne.de>

• References:
  • Errors im Mathematica??
    • From: "Hermann Schmitt" <schmitther@netcologne.de>