[Date Index]
[Thread Index]
[Author Index]
Re: symbol replace
*To*: mathgroup at smc.vnet.net
*Subject*: [mg51242] Re: symbol replace
*From*: "Steve Luttrell" <steve_usenet at _removemefirst_luttrell.org.uk>
*Date*: Sun, 10 Oct 2004 01:57:13 -0400 (EDT)
*References*: <ck88ee$9pk$1@smc.vnet.net>
*Sender*: owner-wri-mathgroup at wolfram.com
The problem is that your subscripted variable is a symbol which happens to
have a subscript attached. What you want is for the whole
symbol-with-subscript to be treated as a symbol. This is what the Notation
package is for. There is another problem where you are using the symbol E
which is reserved in Mathematica to represent the base of natural
logarithms, which might cause you unexpected problems if you use it as a
standard symbol.
The following Cell Expression shows how to use the Notation package to solve
your problem. Copy and paste { ... } into Mathematica.
{
Cell[CellGroupData[{
Cell[BoxData[
RowBox[{
RowBox[{"e", "*",
SubscriptBox["e", "o"]}], "/.",
RowBox[{"e", "\[Rule]",
SubscriptBox["e", "o"]}]}]], "Input"],
Cell[BoxData[
RowBox[{
SubscriptBox["e", "o"], " ",
SubscriptBox[
RowBox[{"(",
SubscriptBox["e", "o"], ")"}], "o"]}]], "Output"]
}, Open ]],
Cell[BoxData[
RowBox[{"<<", "Utilities`Notation`"}]], "Input"],
Cell[BoxData[
RowBox[{"Notation", "[",
RowBox[{
TagBox[
SubscriptBox["e", "o"],
NotationBoxTag,
TagStyle->"NotationTemplateStyle"], " ",
"\[DoubleLongLeftRightArrow]", " ",
TagBox["e0",
NotationBoxTag,
TagStyle->"NotationTemplateStyle"]}], "]"}]], "Input"],
Cell[CellGroupData[{
Cell[BoxData[
RowBox[{
RowBox[{"e", "*",
SubscriptBox["e", "o"]}], "/.",
RowBox[{"e", "\[Rule]",
SubscriptBox["e", "o"]}]}]], "Input"],
Cell[BoxData[
SubsuperscriptBox["e", "o", "2"]], "Output"]
}, Open ]]
}
Steve Luttrell
"symbio" <symbio at h0tmail.com> wrote in message
news:ck88ee$9pk$1 at smc.vnet.net...
>I am facing 2 problems with Mathematica:
> 1st problem)
> With replace all command, when I use it with subscripts I get an
> unintended
> effect, this is what I do:
> E * (Eo) /. E -> (Eo)
> I intend to replace only E with Eo, but Mathematica instead replaces all
> E's
> with (Eo) and I get this instead:
> (Eo) * (Eo)o
> Please note the 'o' in Eo is supposed to be a subscript here and reads
> Enot.
> Can anyone please help?
> here is the Mathematica code:
>
> In[1]:=
> \!\(E\ *\ E\_0\ /. \ E -> \ E\_0\)
> Out[1]=
> \!\(\[ExponentialE]\_0\ \((\[ExponentialE]\_0)\)\_0\)
>
> 2nd problem)
> I like to use descriptive names for my variables with Underscore to
> separate
> the names, it's really easier to read, but of course underscore is a
> special
> character in Mathematica unfortunately, so is there an alternative?? For
> example, I like to use variable Dynamic_Energy_of_Stars_With_Sand = 123;
> Is
> there something else equally as obvious as Underscore that maybe used for
> purpose of separting words in a variables names??
>
> Thanks a lot for your help
>
Prev by Date:
**Re: Re: Re: Conveniently Restarting Notebooks**
Next by Date:
**Re: symbol replace**
Previous by thread:
**Re: Re: symbol replace**
Next by thread:
**Factor 2 error in Inverse Laplace Transform**
| |