ToExpression[..,TexForm] does not seem to work on
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From: Bob Hanlon on 30 Oct 2009 03:18 I have version 7.0.1 $Version 7.0 for Mac OS X x86 (64-bit) (February 19, 2009) s = TeXForm[Sum[f[n], {n, 1, m}]] \sum _{n=1}^m f(n) ToExpression["\\sum _{n=1}^m f(n)", TeXForm] Sum[f[n], {n, 1, m}] Bob Hanlon ---- "Nasser M. Abbasi" <nma(a)12000.org> wrote: ============= From: "Bob Hanlon" > Put a space after sum in the TeX > > s = TeXForm[Sum[f[n], {n, 1, m}]] > > \sum _{n=1}^m f(n) > > Note the space after sum in the above output > > ToExpression["\\sum _{n=1}^m f(n)", TeXForm] > > Sum[f[n], {n, 1, m}] > > ToExpression["\\sum _ {n=1}^m f(n)", TeXForm] > > Sum[f[n], {n, 1, m}] > > > Bob Hanlon > hello; I did. With or without space, I get the same error. Which version you used? I am using version 7 In[1]:= ToExpression["\\sum _{n=1}^m f(n)", TeXForm] During evaluation of In[1]:= ToExpression::esntx:Could not parse \sum _{n=1}^m f(n) as Mathematica input. Out[1]= $Failed Thanks --Nasser
From: Bob Hanlon on 30 Oct 2009 03:23 Put a space after sum in the TeX s = TeXForm[Sum[f[n], {n, 1, m}]] \sum _{n=1}^m f(n) Note the space after sum in the above output ToExpression["\\sum _{n=1}^m f(n)", TeXForm] Sum[f[n], {n, 1, m}] ToExpression["\\sum _ {n=1}^m f(n)", TeXForm] Sum[f[n], {n, 1, m}] Bob Hanlon ---- "Nasser M. Abbasi" <nma(a)12000.org> wrote: ============= Version 7. Some Latex commands are converted ok to Mathematica expressions, such as: ToExpression["\\sqrt{3}", TeXForm] ToExpression["\\frac{a}{b}", TeXForm] But the next Latex "sum" command does not seem to work. Is this a known "issue" or is there a trick for one command? I take the output of the TexForm command, and then try to convert it back to Mathematica expression, but the conversion back fails: s = TeXForm[Sum[f[n], {n, 1, m}]] ToExpression[ToString[s], TeXForm] Even when I type the Latex output by hand, it does not work: ToExpression["\\sum_{n=1}^m f(n)", TeXForm] the error is : Syntax::sntxi:Incomplete expression; more input is needed. ToExpression::esntx:Could not parse \sum_{n=1}^m f(n) as Mathematica input. --Nasser
From: Bob Hanlon on 31 Oct 2009 03:26 The latest Mathematica version is available at http://www.wolfram.com/products/mathematica/latestversion/ Your version number is under the menu Mathematica | About Mathematica... Bob Hanlon ---- "Nasser M. Abbasi" <nma(a)12000.org> wrote: ============= Thanks, I can then only assume that this was a bug in version 7.0.0 and it was fixed in 7.0.1 my system says: "7.0 for Microsoft Windows (32-bit) (November 10, 2008)" rant about version numbers follows: Interesting that $Version prints 7.0 on my system like it does on yours below, but the date is different, mine says nov 10 2008 and yours says "February 19, 2009". I assume then you knew, somehow, from the date shown on your end that this is 7.0.1? It would have been nice if the version number would also have changed/updated to reflect this and not just the date! I noticed for sometime that WRI have something about showing version numbers, it is almost impossible to find what version numbers some of their products are at for some reason. For example, I spent sometime the other day trying to find exactly what version number is the current Mathematica at, and I could not. I think it is 7.0.2, or 7.2.0, but I am guessing as there is no place on WRI web site which says anything about this. If any one knows where to find this info, please let me know, as I'd like to keep my Mathematica version number page correct here http://12000.org/my_notes/compare_mathematica/index.htm --Nasser ----- Original Message ----- From: "Bob Hanlon" <hanlonr(a)cox.net> To: "Nasser M. Abbasi" <nma(a)12000.org>; <mathgroup(a)smc.vnet.net> Sent: Thursday, October 29, 2009 7:33 PM Subject: Re: ToExpression[..,TexForm] does not seem to work on some Latex commands? > > I have version 7.0.1 > > $Version > > 7.0 for Mac OS X x86 (64-bit) (February 19, 2009) > > s = TeXForm[Sum[f[n], {n, 1, m}]] > > \sum _{n=1}^m f(n) > > ToExpression["\\sum _{n=1}^m f(n)", TeXForm] > > Sum[f[n], {n, 1, m}] > > > Bob Hanlon > > ---- "Nasser M. Abbasi" <nma(a)12000.org> wrote: > > ============= > > From: "Bob Hanlon" > >> Put a space after sum in the TeX >> >> s = TeXForm[Sum[f[n], {n, 1, m}]] >> >> \sum _{n=1}^m f(n) >> >> Note the space after sum in the above output >> >> ToExpression["\\sum _{n=1}^m f(n)", TeXForm] >> >> Sum[f[n], {n, 1, m}] >> >> ToExpression["\\sum _ {n=1}^m f(n)", TeXForm] >> >> Sum[f[n], {n, 1, m}] >> >> >> Bob Hanlon >> > > > hello; > > I did. > > With or without space, I get the same error. Which version you used? I am > using version 7 > > In[1]:= ToExpression["\\sum _{n=1}^m f(n)", TeXForm] > During evaluation of In[1]:= ToExpression::esntx:Could not parse \sum > _{n=1}^m f(n) as Mathematica input. > Out[1]= $Failed > > Thanks > --Nasser >
From: Bob Hanlon on 31 Oct 2009 03:34
The latest Mathematica version is available at http://www.wolfram.com/products/mathematica/latestversion/ Your version number is under the menu Mathematica | About Mathematica... Bob Hanlon ---- "Nasser M. Abbasi" <nma(a)12000.org> wrote: ============= Thanks, I can then only assume that this was a bug in version 7.0.0 and it was fixed in 7.0.1 my system says: "7.0 for Microsoft Windows (32-bit) (November 10, 2008)" rant about version numbers follows: Interesting that $Version prints 7.0 on my system like it does on yours below, but the date is different, mine says nov 10 2008 and yours says "February 19, 2009". I assume then you knew, somehow, from the date shown on your end that this is 7.0.1? It would have been nice if the version number would also have changed/updated to reflect this and not just the date! I noticed for sometime that WRI have something about showing version numbers, it is almost impossible to find what version numbers some of their products are at for some reason. For example, I spent sometime the other day trying to find exactly what version number is the current Mathematica at, and I could not. I think it is 7.0.2, or 7.2.0, but I am guessing as there is no place on WRI web site which says anything about this. If any one knows where to find this info, please let me know, as I'd like to keep my Mathematica version number page correct here http://12000.org/my_notes/compare_mathematica/index.htm --Nasser ----- Original Message ----- From: "Bob Hanlon" <hanlonr(a)cox.net> To: "Nasser M. Abbasi" <nma(a)12000.org>; <mathgroup(a)smc.vnet.net> Sent: Thursday, October 29, 2009 7:33 PM Subject: Re: ToExpression[..,TexForm] does not seem to work on some Latex commands? > > I have version 7.0.1 > > $Version > > 7.0 for Mac OS X x86 (64-bit) (February 19, 2009) > > s = TeXForm[Sum[f[n], {n, 1, m}]] > > \sum _{n=1}^m f(n) > > ToExpression["\\sum _{n=1}^m f(n)", TeXForm] > > Sum[f[n], {n, 1, m}] > > > Bob Hanlon > > ---- "Nasser M. Abbasi" <nma(a)12000.org> wrote: > > ============= > > From: "Bob Hanlon" > >> Put a space after sum in the TeX >> >> s = TeXForm[Sum[f[n], {n, 1, m}]] >> >> \sum _{n=1}^m f(n) >> >> Note the space after sum in the above output >> >> ToExpression["\\sum _{n=1}^m f(n)", TeXForm] >> >> Sum[f[n], {n, 1, m}] >> >> ToExpression["\\sum _ {n=1}^m f(n)", TeXForm] >> >> Sum[f[n], {n, 1, m}] >> >> >> Bob Hanlon >> > > > hello; > > I did. > > With or without space, I get the same error. Which version you used? I am > using version 7 > > In[1]:= ToExpression["\\sum _{n=1}^m f(n)", TeXForm] > During evaluation of In[1]:= ToExpression::esntx:Could not parse \sum > _{n=1}^m f(n) as Mathematica input. > Out[1]= $Failed > > Thanks > --Nasser > |