[Air X]

I've been learning about this in math and thought I'd do a program to save me some time for class (since I don't have a fancy-pants TI Nspire), and so far it seems to be working, but my problem is.. I'm sort of stuck. :/


Here is the interface, which I'm content with at the moment. Sure, it could be improved, but I don't really care right now.


When you enter each number into the textbox, and hitting the button, it adds the number imputed into the first listbox. Listbox1 will then sort the numbers in order (from smallest to largest) and also updates the average (x bar). My problem right now is, how can I get the numbers from the listbox1 to match up with the numbers from listbox2 and listbox3? (including their formulas)

From that point, I can easily add the rest. Can someone help me out here please? I'd really appreciate it! 🙂

Here is the code, which should help (please don't flame at me for the quality of my code 🤨):
http://pastebin.com/angE5vZe

[H3x0S]

What exactly do you want in ListBox2 and ListBox3. Let's say that you have "1,2,3,4,5" in ListBox1, what would ListBox2 and ListBox3 contain?

[Air X]

What exactly do you want in ListBox2 and ListBox3. Let's say that you have "1,2,3,4,5" in ListBox1, what would ListBox2 and ListBox3 contain?

Listbox2 contains the final answer from the formula above listbox2, so, the final product would be (for listbox2):

1 = -2 (because 1-3)
2 = -1 (because 2-3)
3 = 0 (because 3-3)
4 = 1 (because 4-3)
5 = 2 because 5-3)

And then having each of those numbers from listbox2 corresponding with the numbers from listbox1 (1 from listbox1 would match up with -2 and so on).

Listbox3 is essentially the same thing, with the same formula, only the numbers are squared.

[mardee001]

Just an idea. im no expect but i think this could work.
you could define a global array for your form for the numbers you put in your textbox.
then in your code in your button1.click event you add the values to the array as you add them to listbox1
You then add another button called something like calculate
which will then use the array of your values
to populate listbox 2 and 3 with the corresponding array values in listbox1.

---

if you want them to change as you type you could do the whole thing in your button1.click
just instead of adding your textbox number to listbox1 you add them to a global sorted array
which you will then refer to when populating listbox1,2and 3 simultaneously. hope you
understand my idea

[Air X]

Just an idea. im no expect but i think this could work.
you could define a global array for your form for the numbers you put in your textbox.
then in your code in your button1.click event you add the values to the array as you add them to listbox1
You then add another button called something like calculate
which will then use the array of your values
to populate listbox 2 and 3 with the corresponding array values in listbox1.

---

if you want them to change as you type you could do the whole thing in your button1.click
just instead of adding your textbox number to listbox1 you add them to a global sorted array
which you will then refer to when populating listbox1,2and 3 simultaneously. hope you
understand my idea

That could possibly work. The listbox1 is technically an array though (seeing as it's a set of numbers stored into one thing). I get what you're saying. I have it set up currently where it calculates as you enter in the data, which is what I want. If I have to add in an extra button, it's not a huge deal. It just saves time from hitting another button (very lazy xD).

[mardee001]

Dim items = (From item In ListBox1.Items
Let parts = item.ToString.Split(New String() {" - ("}, StringSplitOptions.None)
Order By CInt(parts(0)) _
Select item).ToArray
ListBox1.Items.Clear()
ListBox1.Items.AddRange
Dim total As Integer
Dim x As Integer
Dim listboxtotal As Integer = ListBox1.Items.Count
For x = 0 To listboxtotal - 1
total = total + ListBox1.Items.Item(x)
Next
avgnum.Text = Math.Round(total / x, 3)

after the above statements from your code thats when you are suppose to add the values for listbox2 and 3 for every number in listbox1

for y = 1 to listbox1.items.count
ListBox2.Items.Add(ListBox1.Items.Item(y-1)-avgnum.Text)
ListBox3.Items.Add(Math.Pow((ListBox1.Items.Item(y-1)-avgnum.Text),2))
next

🤝

[Air X]

after the above statements from your code thats when you are suppose to add the values for listbox2 and 3 for every number in listbox1

for y = 1 to listbox1.items.count
ListBox2.Items.Add(ListBox1.Items.Item(y-1)-avgnum.Text)
ListBox3.Items.Add(Math.Pow((ListBox1.Items.Item(y-1)-avgnum.Text),2))
next

🤝

EXACTLY what I needed. Thank you SO much! 👍👍

[mardee001]

you are welcome. forgot to mention that you have to clear
listbox2 and listbox3 before the for loop... if you already havent
figured that out
🤝