A list, L1, was deleted, how do you add L1 back to

Enter the data in any order in your list. Press [2nd][Quit] to exit the data editor.
In Main screen, press STAT, select SortA( for ascending or SortD( for descending order.
The command echoes on main screen as SortA(. Press [2nd][1] for L1 or 2nd 2 for L2. Close parenthesis and press ENTER. The L1 list or the L2 list will be sorted.
If the list are linked you must sort them together. In that case the syntax is SortA( L1,L2) ENTER.The list will be sorted according to the order in L1.

When you press [STAT] key, under the EDIT menu you see [1:Edit]. If you press 1 you open all the lists for editing. If L1 is not there, that is because you deleted it.

1. To restore the L1 list (BUT NOT THE DATA) , press the [STAT] key.
2. Under the EDIT menu, press [4:SetUpEditor] and press [ENTER].
3. The L1 list should be restored.

Hi vanman21,

You may have a plot on, other than the one your trying to use or, graph. You can press, [2nd] [Y=] and, [Arrow Up] to go to the plots and, make sure all other plots are off. As k_akima stated, your number of list elements may be wrong. You can display L1 and, L2 at the home screen or, in the plots menu and, make sure both list have the same length and, data is correct.

It is important to select L1 and L2 from the [2nd] [1] for L1 and, [2nd][2] for L2 on the calculator. If you type [alpha][L][1] won't work.

Next, press [STAT] [5]:SetUpEditor and, the SetUpEditor command will display at the Home screen for you. It is important to do this process before you start creating lists to be analyzed and, used on the calculator. This will save you a lot of hardships from data that is already being used and, in the calculator registers. You can also associate your list to your project so, that other data won't conflict and, cause errors.

You also should add the rest of the lists or, structure of the CubicReg(L1,L2,Frequency list,RegEQ). The SetUpEditor is a great tool to help you gain the proper structure. The default for frequency is sat at 1 if not used but, having a RegEQ (such as Y1), will help the calculator to calculate your data. Just remember to set the mode to Func before you use the SetUpEditor.

If you have any questions, just post a comment and, I'll respond quickly.

Even if you do not have L1 you can still graph: You have 6 lists to put data in. You are not required to use L1 but you will have to specify the lists. Be it as it may you can restore L1, which in all likelihood you deleted.
Press the [STAT] key and select [4:SetUpEditor] then press [ENTER]

So you have deleted the L1,L2 lists. Well their contents are lost and the lists are no longer there to be filled. Right?
Have no fear, they can be restored (without your valuable data).

Press [STAT]. The Stat editor screen display 5 sub-menus.
Select [5:SetUpEditor] and press [ENTER].
Press [STAT][1:Edit] and you now see L1, and L2, and the lists you did not delete.
Enter your data again in L1 and L2.

To recover a list you have deleted (NOT the DATA IN IT) press [STAT][5:SetUpEditor]. All lists L1, to L6 will be available again.

1. Press [STAT][5:SetUpEditor][ENTER].
2. Press [STAT][1:Edit..]
3. Enter your data in L1.
4. Press [STAT][CALC][1:1-Var Stats].
5. Command echoes on main screen.
6. If ONLY one list contains data, it must be L1.
7. When you do not specify the list in the command line it will take L1 by default.
8. If L1 is empty and the data is in L2, or another but L1, the name of list must be specified.
   

There is no L7 list. You can put your data in any available list. You can even create your own lists.
Anyway, to recover the L1,L2,L3, and L4,
Press [STAT][5:SetUpEdidor] [ENTER]
Calculator displays Done.

Press [STAT]. Under Menu EDIT, Press [1:Edit]
The List editor opens the L1,L2, etc. liststo let you enter your data.

Most of the time when you get the "invalid dimenstion" error, either list 1 or list 2 is longer than the other. Check your data and make sure you there are not more numbers in one list than in the other.

Another posssibility is that when you tried to clear list one, you may have deleted list one. If this is the case, you can get the column labeled list one back by pressing stat, then select set up editor form that menu which will take you back to the home screen. Press enter and the word done will appear. Now when you go back to stat edit, list one will be there.

The only way to modify the add/remove programs list is to edit the registry. If you are uncomfortable doing this, get someone to help who is, or just leave the registry alone.
It's best to back up the registry in case you make a mistake.
To back up your registry, see this article.

On to the fun part. Follow these instructions exactly. Note: this applies to Windows XP only. If you have Windows Vista, please modify the question.

1. Click Start, and then click Run.
2. In the Open box, type regedt32, and then click OK.
3. In Registry Editor, locate the following registry key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
4. In the left pane, click the Uninstall registry key, and then click Export on the File menu.
5. In the Export Registry File dialog box that appears, click Desktop in the Save in list, type uninstall in the File name box, and then click Save.
6. Each key listed under Uninstall in the left pane of Registry Editor represents a program that is displayed in the Currently installed programs list of the Add or Remove Programs tool. To determine which program that each key represents, click the key, and then view the following values in the details pane on the right: DisplayName: The value data for the DisplayName key is the name that is listed in Add or Remove Programs.
   
   -and-
   
   UninstallString: The value data for the UninstallString key is the program that is used to uninstall the program.
7. After you identify the registry key that represents the program that you removed but which is still displayed in the Currently installed programs list of Add or Remove Programs, right-click the key in the left pane of the Registry Editor window, and then click Delete.
   
   Click Yes in response to the "Are you sure you want to delete this key and all of its subkeys?" message.
8. On the File menu, click Exit to quit Registry Editor.
9. Click Start, click Control Panel, and then click Add or Remove Programs.
   
   In the Currently installed programs list, verify that the program whose registry key you deleted is no longer listed.
10. Do one of the following:
    • If the program list is not correct in Add or Remove Programs, double-click the Uninstall.reg file that you saved to your desktop in step 5 to restore the original list of programs in the registry.
      
      -or-
    • If the program list is correct in Add or Remove Programs, right-click the Uninstall.reg file on your desktop, and then click Delete.