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Sigma parsing
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7MT


Newbie


Joined: 10 Oct 2011
Posts: 4
Posted: 12 May 2012 01:35:05 pm    Post subject: Sigma parsing
Ʃ is shown as &#931 on my calculator.
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comicIDIOT


Guru


Joined: 01 May 2006
Posts: 5106
Location: SFBA, California
Posted: 12 May 2012 03:03:54 pm    Post subject:
Are you using the Prizm or the TI SourceCoder?
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7MT


Newbie


Joined: 10 Oct 2011
Posts: 4
Posted: 12 May 2012 05:03:02 pm    Post subject:
I was using Sourcecoder 2.5.
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KermMartian


Site Admin


Joined: 14 Mar 2005
Posts: 55737
Location: Earth, Sol, Milky Way
Posted: 12 May 2012 05:06:09 pm    Post subject:
7MT wrote:
I was using Sourcecoder 2.5.
But are you targetting the Prizm or the TI-83+/84+? Comic makes a good point; I didn't even consider that you might be using the Prizm editor.
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7MT


Newbie


Joined: 10 Oct 2011
Posts: 4
Posted: 12 May 2012 05:08:15 pm    Post subject:
It's for the 84+. The Σ appears sometimes, but not always.
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KermMartian


Site Admin


Joined: 14 Mar 2005
Posts: 55737
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Posted: 12 May 2012 05:09:08 pm    Post subject:
7MT wrote:
It's for the 84+. The Σ appears sometimes, but not always.
Hmm, interesting. You must be trying to write notes instead of programs, since there isn't a sigma character in normal TI-BASIC. How are you typing the sigma?
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blue_bear_94


Member


Joined: 20 Apr 2012
Posts: 162
Posted: 12 May 2012 05:13:08 pm    Post subject:
There is actually a two-byte token represented as a sigma.
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7MT


Newbie


Joined: 10 Oct 2011
Posts: 4
Posted: 12 May 2012 05:13:31 pm    Post subject:
Yes, I am typing notes. I just put it as Σ when I use it in Text(a,b," etc. It does work if I do "Σ->Str0 and Text(a,b,"<String 1>"+Str0+"<String 2>", but not when the character is part of a string with other characters.
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KermMartian


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Joined: 14 Mar 2005
Posts: 55737
Location: Earth, Sol, Milky Way
Posted: 12 May 2012 05:17:00 pm    Post subject:
Blue_bear: Believe it or not, I actually knew that. Razz I don't see the value in your post. Please limit yourself to directly-constructive posts.

7MT wrote:
Yes, I am typing notes. I just put it as Σ when I use it in Text(a,b," etc. It does work if I do "Σ->Str0 and Text(a,b,"<String 1>"+Str0+"<String 2>", but not when the character is part of a string with other characters.
Ah, so you're copying and pasting a Unicode sigma. I'm not sure why it is only working part of the time, but I'll try it when I return from some errands and see what I can figure out.
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Last edited by KermMartian on 12 May 2012 08:07:15 pm; edited 1 time in total
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comicIDIOT


Guru


Joined: 01 May 2006
Posts: 5106
Location: SFBA, California
Posted: 12 May 2012 05:33:16 pm    Post subject:
KermMartian wrote:
Blue_bear: Believe it or not, I actually knew that. Razz I don't see the value in your post. Please limit yourself to [...?]


In his defense I believe he misread your post, just like I did.
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KermMartian


Site Admin


Joined: 14 Mar 2005
Posts: 55737
Location: Earth, Sol, Milky Way
Posted: 13 May 2012 09:06:22 am    Post subject:
OK, I've tracked down the issue. 2.53MP added the Σ( command, which is token 239,51. This is a token consisting of the sigma and parentheses characters. Therefore, you cannot use sigma on its own, only followed by a parenthesis.
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elfprince13


OVER NINE THOUSAND!


Joined: 23 May 2005
Posts: 10228
Location: A galaxy far far away......
Posted: 18 May 2012 12:57:28 pm    Post subject:
wait, so 2.53MP broke the use of the existing Σ token in adding the Σ( token? How does that command work? Is it any different from sum(seq(?
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blue_bear_94


Member


Joined: 20 Apr 2012
Posts: 162
Posted: 18 May 2012 07:15:30 pm    Post subject:
Yes. They basically do the same thing, except Σ( doesn't use lists and (end-start)/step can be greater than 999.
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