Re: Re: Errors im Mathematica??
- To: mathgroup at smc.vnet.net
- Subject: [mg29456] Re: [mg29429] Re: [mg29407] Errors im Mathematica??
- From: "Hermann Schmitt" <schmitther at netcologne.de>
- Date: Wed, 20 Jun 2001 04:36:36 -0400 (EDT)
- References: <200106180739.DAA14299@smc.vnet.net> <200106190935.FAA15004@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Hello, I do not want to discuss, if this is an error or not. But I nowhere read something about this fact. I think, it is not good, that different rules apply to statements in different parts of the program, if it is not absolutely necessary. I think, the body of the function is read into a string and thereby the newlines are omitted. I think the newlines should not be omitted or they should be replaced by ";" by the Mathematica software. Hermann Schmitt. ----- Original Message ----- From: "Maryvonne Teissier" <my.teissier at cybercable.fr> To: mathgroup at smc.vnet.net Subject: [mg29456] [mg29429] Re: [mg29407] Errors im Mathematica?? > 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 > >