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Re: Using Map with function that has options...


Giacomo Ciani wrote:
> I have several expressions I whant to convert to string and then
> concatenate togheter to create a message to be sent to the standard
> output and written on a text log file. To avoid manually appliyng
> ToString to each of them, I'm using something like:
> 
> myMessage = StringJoin@@Map[ToString,{expr1,expr2,expr3,...,exprN}]
> 
> The problem is that I would like to specify the option
> "TraditionalForm" for ToString (without that, the exponents are written
> on a different line compromising the formatting), but I can't
> understand if using this tecnique I can do that, and how.
> 
> Obviously I can solve the problem with an explicit loop over the
> element of the array, but I was looking for a more elegant solution...
> any idea?
> 
> Thanks
> 
> Giacomo
> 
> P.S. expr are in general both strings or numeric values
> 
Hi Giacomo,

The following should do what you are looking for:

expr1 = x^2;
expr2 = F[D[y[x], x], D[y[x], x, x]] == Sin[x]*Cos[x];
expr3 = 1224.537;
myMessage = StringJoin @@ ToString /@
  TraditionalForm /@ {expr1, expr2, expr3}

HTH,
Jean-Marc


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