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Groups > comp.soft-sys.math.mathematica > #3088
| From | "Dr. Peter Klamser" <klamser@googlemail.com> |
|---|---|
| Newsgroups | comp.soft-sys.math.mathematica |
| Subject | Re: Is there ToNumber? |
| Date | 2011-06-12 23:01 +0000 |
| Organization | Steven M. Christensen and Associates, Inc and MathTensor, Inc. |
| Message-ID | <it3gfh$hlm$1@smc.vnet.net> (permalink) |
| References | <isnllk$n7b$1@smc.vnet.net> <201106090945.FAA06238@smc.vnet.net> <201106120907.FAA11484@smc.vnet.net> |
... ToExpression["1 e^3"] It looks for an string, that smells a little bit like a expression. I think it is good idea to offer something, that can be interpreted as an exponent. Kind regards Peter Am 12.06.2011 11:07, schrieb ADL: > On 11 Giu, 12:52, "Dr. Peter Klamser"<klam...@googlemail.com> wrote: >> ... ToExpression["1+1"] >> >> One Hint: If you know a function in Mathematica like "ToString", you >> mentioned in your email, look in the help system in the section "see >> also", there you find ToExpression["1+1"]. >> >> Kind regards >> >> Peter >> >> Am 11.06.2011 09:59, schrieb Ted Sariyski: >> >>> Hi, >>> Is there a built-in function which returns the numeric value of a string >>> (like ToString but inverse). Currently I use mine function toNumber: >>> ch = StringToStream[timeStr]; >>> timeNum = Read[ch, Number]; >>> Close[ch]; >>> but I suspect there is easier way. >>> Thanks in advance, >>> --Ted >> -- >> Mit freundlichen Gr en >> >> Uta& Peter Klamser > The request is less trivial than ToExpression["1+1"] since, for > example, typical number format cannot be read into Mathematica without > the rather involved trick reported by Ted Sariyski. As an example, > > ToExpression["1e3"] > ==> e3 > > > ch = StringToStream["1e3"]; > timeNum = Read[ch, Number]; > Close[ch]; > timeNum > ==> 1000 > > I feel this complication as rather unfortunate, unless I am also > missing a simpler way to read in numbers. > > ADL > -- Mit freundlichen Grüßen Uta& Peter Klamser
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Is there ToNumber? Ted Sariyski <tsariysk@craft-tech.com> - 2011-06-11 07:59 +0000
Re: Is there ToNumber? Albert Retey <awnl@gmx-topmail.de> - 2011-06-14 11:52 +0000
How to extract a pattern Ted Sariyski <tsariysk@craft-tech.com> - 2011-06-15 11:20 +0000
Re: Is there ToNumber? "Hans Michel" <hmichel@cox.net> - 2011-06-16 08:02 +0000
Re: Is there ToNumber? "Dr. Peter Klamser" <klamser@googlemail.com> - 2011-06-11 10:52 +0000
Re: Is there ToNumber? "Harvey P. Dale" <hpd1@nyu.edu> - 2011-06-12 09:07 +0000
Re: Is there ToNumber? ADL <alberto.dilullo@tiscali.it> - 2011-06-12 09:07 +0000
Re: Is there ToNumber? "Hans Michel" <hmichel@cox.net> - 2011-06-12 23:00 +0000
Re: Is there ToNumber? "Dr. Peter Klamser" <klamser@googlemail.com> - 2011-06-12 23:01 +0000
Re: Is there ToNumber? DrMajorBob <btreat1@austin.rr.com> - 2011-06-15 11:19 +0000
Re: Is there ToNumber? Daniel Lichtblau <danl@wolfram.com> - 2011-06-15 11:19 +0000
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