Storing numerical data?

Forum Attachments

Summary:

I need to store a lot of numbers in a very particular way.

Storing numerical data?

Weishaupt 28 Dec 2015 21:51

Hi! I'm new to TI programming, but I've already done a lot of programs.

I need to make a program that stores data in a very particular way. I need to:

1) Have a lot of data. No variables.

2) Store this data in sets so that:

a) The program knows "this is the first set, this is the second set…"

b) The program knows "this is the first element of the set, this is the second element…"

3) The program can make new sets and add data to them.

Any ideas?

Re: Storing numerical data?

Silver Phantom 28 Dec 2015 22:04

The best way would be to use custom lists. each list could be a new set and the indexing of the list makes it easy to get elements.

---

The Silver Phantom welcomes you

Re: Storing numerical data?

Weishaupt 28 Dec 2015 22:19

I'm sorry, but… I'm not sure what that is, nor how to use it.

Re: Storing numerical data?

Silver Phantom 28 Dec 2015 22:25

http://tibasicdev.wikidot.com/sk:lists

custom lists are user defined lists. They're exactly like the lists ⌊A and ⌊B except they can have they're own name as long as it begins with ⌊

that link should help. if you still have questions, feel free to ask.

---

The Silver Phantom welcomes you

Re: Storing numerical data?

Weishaupt 29 Dec 2015 19:46

That sounds great! I have two more problems before I start coding:

1) I need to have the program create lists of the format "LISTn", like, a command that stores a value of n as a var and says create "LISTn" or says "Compare LIST(n-1) to LISTn" or what have you.

2) I need to be able to store two numbers as one and then extract them. Like, store a and b as c and then get a and b from c with trivial effort.

Re: Storing numerical data?

jonbush 29 Dec 2015 21:03

1) I am not aware of any TI-BASIC method of dynamically creating custom lists.

2) You can store a and b as the real and imaginary parts of a complex number in the list:

A+Bi→C
real(C→A
imag(C→B

Last edited on 29 Dec 2015 21:03 by jonbush Show more

Re: Storing numerical data?

Weishaupt 29 Dec 2015 21:31

No, two integers as an integer.

Re: Storing numerical data?

Silver Phantom 29 Dec 2015 22:05

Using the imaginary compression method would be ideal if its just two numbers as Jonbush gave, but you can also do a digits based compression. Something like 19 and 6 can be stored as 1906. You can find more at compression page.

As for a dynamic list… there's no good way to do it. Even if you use a expr( and string method to compare the lists dynamically, you can't create new lists in this method. The program has to individually create each list within the program, it can't be automated.

---

The Silver Phantom welcomes you