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I have a command that essentially functions like clearing the memory, but doesn't wipe programs and sets the settings I like. I found out that while it does its job well, it doesn't seem to clear the equations in the Y= menu. Is there a command or another way to achieve this?

PROGRAM:CLEAR
:MATHPRINT
:Normal
...
:DiagnosticOn
:ClrDraw
:Clear Entries
:ClrAllLists
:SetUpEditor
:ClrHome
:"
  • I found what I now believe to be the best answer to this question using graph database variables. If you're still looking for a solution check out the edit I made to my answer. – ankh-morpork Mar 14 '15 at 11:41

2 Answers2

5

On a similar note to TimTech, Delvar can be used to reset the value of a variable.

DelVar Y1

The benefit of this is that multiple DelVar calls can be chained without a line break.

DelVar Y1DelVar Y2Disp "Done

A non-programmatic way of clearing a calculator is to use the key sequence 2nd + 7 1 2. Unfortunately, this also clears programs.

This method will clear all RAM on the calculator, so use it with caution.

I found a better programmatic way of clearing the Y-VARS. This method also resets all other graph settings to their default value. In your case, this seems to be a desirable side-effect. Unfortunately, it requires a little bit of set up and occupies one of the Graph Database variables (119 Bytes). Because this variable can be kept archived, this does not consume any RAM.

Setup

  1. Manually clear All Y-VARS, including parametric, polar and sequence variables.
  2. Manually Reset All graph window settings to their default
    • ZStandard
    • RectGC
    • CoordOn
    • GridOff
    • AxesOn
    • LabelOff
    • ExprOn
  3. Store current setting in a Graph Database variable
    • StoreGDB GDB1 entered with key strokes: 2ndPRGM◄5VARS3ENTERENTER
  4. Archive GDB1
    • Archive GDB1 entered with keystrokes: 2nd+5VARS3ENTERENTER

Use in Program

To use this archived variable in a program, you must unarchive it, recall its contents, and finally archive the variable again. This is accomplished by the following code block.

UnArchive GDB1  
RecallGDB GDB1  
Archive GDB1

If you're using a TI-83 calculator, you need to skip the steps involving archiving because the TI-83 does not support flash memory. The TI-83 Plus and above work fine, however.

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ankh-morpork
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  • Actually, I forgot about this. This would save 1 byte over mine because of the chaining. By the way, don't try `2nd + 7 1 2` unless you want to clear the user-accessible RAM portion of your calculator... – Timtech Mar 13 '15 at 10:59
  • @Timtech yeah... that'll clear every thing... I'll add a warning to my answer. On that note, make this program: `AsmPrgrm:AA` and run it with `Asm(prgrmCLEAR` to clear every thing. – ankh-morpork Mar 13 '15 at 16:57
  • Cool! I probably won't try it, though ;) – Timtech Mar 13 '15 at 23:03
  • @dohaqatar7 Also is there somewhere I can find RecallGBD? Because I had to look in the catalog for it. –  Mar 15 '15 at 03:31
  • @JeffreyLin It is under the `STO` sub-menu of of the draw menu. Keystrokes: `2nd PRGM ◄ 4` – ankh-morpork Mar 15 '15 at 10:44
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    A few typos; shouldn't all of the GBD be GDB? – Timtech Mar 16 '15 at 00:41
2

No command, but you can do "->Y1 or DelVar Y1 to clear Y1, and similarly for the others.

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