Re: solving equations
- To: mathgroup at smc.vnet.net
- Subject: [mg105892] Re: solving equations
- From: dr DanW <dmaxwarren at gmail.com>
- Date: Wed, 23 Dec 2009 02:43:13 -0500 (EST)
- References: <hgq28n$ged$1@smc.vnet.net>
Maria,
You can't use a period in a symbol name; Mathematica interprets that
as a dot product. You first have to replace the periods with a
harmless character (I am using a bullet, entered into Mathematica as
"escape \bu escape",) being careful not to replace the periods where
they are being used as decimals:
--- snip ---
dots = ReadList["a.txt", Record, RecordSeparators -> {}]
(* "Everybody stand back. I know regular expressions." --
http://imgs.xkcd.com/comics/regular_expressions.png *)
nodots = StringReplace[dots[[1]],
StringExpression[pre:LetterCharacter, ".",
post:LetterCharacter] :>
StringJoin[pre, "\[Bullet]", post]]
Solve[ReadList[StringToStream[nodots], Expression], {x}]
--- end ---
Regards,
Daniel
