Hello,
Press [2nd][MEM][2: Mem Mgmt/Del][1:All] and scroll down to see if a system variable or other entity that is needed for graphing may have been archived. A variable that is archived has an asterisk next to it on the left.
To unarchive it press ENTER when the arrow reaches it.
You may be able to draw your graphs. It you are unable, I suggest you reset the Ram: Press [2nd][MEM][7:Reset][1:All Ram][2:Reset] [ENTER]. Press [CLEAR] to erase the message and restart the statistics.
Hope it helps.
Testimonial: "I had not considered this a duplicate question as TI83/TI84 may be different, and only saw TI84 option first. Thank you."
Only the hardware is. So if you have anymore questions on how to use the TI83Plus or the TI84Plus, TI84 Plus Silver Edition, and you find an answer that applies to one of the family, it applies to the others. The TI83 (no +, nor + SE) is different because it does not have Flash memory. Sorry sir, I did not mean to sound professoral.
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If you use the Ti83 \ Ti84 SetUpEditor command at first when you start your STAT problem, or to make lists for a STAT equations and data you will not get archive error. Because if it does execute that means L1, L2 ...L6 weren't mistakenly archived in the first place. I know everybody want to delete the RAM everytime they have trouble, or start a new problem. This will only lead you to losing everything you have on your calculator that isn't archived, and be a nightmare of continuously re-installing everything back on to the calculator. Just not good thinking.
Using the SetUpEditor command also has its advantages too. Not only will it allocate the L1, L2, to L6, lists to the STAT editor but, you can tie what ever list or lists you want to your STAT's by executing the list or lists with the SetUpEditor at the home screen.
Example at the home screen: SetUpEditor L1,L2,RESID and press ENTER. Once again, if it does execute that means your good to go and your lists you are not archived and ready to use.
If by chance you did archive the list or lists you are using then Press [2nd][MEM][ 2- Mem Mgmt/Del key] [4], and find and highlight the archived list that you wish to unarchived, and press ENTER.
Just be careful, don't name a list with a name that you are already using for something else. As long as you stay with L1,L2...L6, your set up will always be quick and easy.
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