Re: TIB: Number from list

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Re: TIB: Number from list


Ah, yes... on the TI-89, it is more similar to a 92/+.

Lists are handled like this:

{0,9,8,7,6,5,4,3,2,1}->lst
        {0,9,8,7,6,5,4,3,2,1}
lst[1]
                            0
lst[2]
                            9
lst[3]
                            8
lst[4]
                            7
...

Strings are similar to how you described them, only the 89 uses the 'mid('
command much like Quick BASIC.

"0987654321"->str
                 "0987654321"
mid(str,1,1)
                          "0"
mid(str,2,1)
                          "9"
mid(str,3,1)
                          "8"
...

But if you want the values, you'll have to use the 'expr(' command to get
the actual values instead of a string.

"0987654321"->str
                 "0987654321"
expr(mid(str,1,1))
                            0
expr(mid(str,2,1))
                            9
expr(mid(str,3,1))
                            8
...

-Miles Raymond      EML: m_rayman@bigfoot.com
ICQ: 13217756       IRC: Killer2        AIM: MRayMan
http://www.bigfoot.com/~m_rayman/


----- Original Message -----
From: <Bigskank9@aol.com>
To: <ti-basic@lists.ticalc.org>
Sent: Monday, April 12, 1999 8:22 PM
Subject: Re: TIB: Number from list


> In a message dated 4/12/99 5:19:31 PM Pacific Daylight Time,
Jared173@aol.com
> writes:
>
> <<
>  Say I had a list like {5, 2, 6, 4}
>  What would be the fastest way to get the third number in the list?
>
>  Ooh, apparently a string takes up less memory on the 89.  So, how would I
do
>  the same sort of thing for a string, like finding the third number from
the
>  left, etc. ?
>   >>
>
> \->\=sto command
> on the 86 if you do {5,2,6,4}\->\A
> then A(1)=5  A(2)=2 A(3)=6 A(4)=4
> the syntax may be a little diffrent for the 89
> and you can use the "sub" command to deal w/ strings
> ex: "5264"\->\A
> sub(A,3,1)=6
> the 3 points to the first space to start at and 1=the length which would
> return 6
> once again the 89 may have diffrent syntax
References: