Question about Texas Instruments TI-84 Plus Calculator
You already have a list L1 archived in memory.
You have two choices. You can either choose another name or you can unarchive the existing L1. To unarchive a list, press 2ND [MEM] 2 4 then use the arrow keys to move the highlight to the line containing L1 (there should be an asterisk "*" in front of the name). Press ENTER and the asterisk should disappear. Press 2ND [QUIT] to return to the home screen.
Posted on Nov 29, 2012
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Posted on Jan 02, 2017
SOURCE: Hi- on my Ti-84 plus
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]
Posted on Sep 11, 2010
SOURCE: Trying to use the solver
Some variable in your function is in archive memory. Press 2ND [MEM] 2 to get into the Memory Management menu. Press 1 to select All. Do you see a variable you're using in your function with an asterisk to its left? If so, navigate down to it and press ENTER to turn off the asterisk. Do this for as many variables as necessary, then press 2ND [QUIT] to exit.
Try the Solver again.
Posted on Apr 08, 2010
I assume you know how to enter data in your calculator. The keystrokes in the following pertain to TI92/92Plus/ Voyage 200 PLT. The main differences with the TI89/Ti89 Titanium is that the function keys F6,F7,F8 are not accessed directly but by the key sequences [2nd][F1], [2nd][F2], and [2nd][F3] respectively
1. CLEAN THE SLATE (so to speak) and ENTER DATA
In Home folder run F6: NewProb to reset the configuration.
Press Apps, and select 6: data/Matrix editor. Select a new data set
Give it a name: here testing.
Press OK/ENTER, The data entry screen opens, enter your values.
When you finish press F2.PlotSetUp.
2. Statistical plot setup and scatter plot drawing
Press F1:define to configure Plot1. Choose Scatter, then choose a mark for the data point. I select 5:Dot. and press [ENTER
Select the data column X=c1, Y=c2
Press ENTER to save configuration. Press [CTRL] [GRAPH] On my TI92 the CTRL key is the [Diamond] key. On the following graph I changed the mark to a cross to see the data point better. I also played with the window dimension. You can also do that with ZoomStat. The graph remind me of a parabola (I know I chose the exact values)
3. STATISTICAL CALC. AND REGRESSION ANALYSES.
Now we have to find the equation that fits these data best.
You press APPS 6:Data/ Matrix editor but you select current to return to your data set. You are taken to the data entry editor (Figure 3 above). In that screen Press F5:Calc to edit the type of statistics you want
On first line select the type of regression model : Linear Regression, QuadReg quadratic regression (or anything else available) X is from column1, Y is from column 2. Store RegEQ The regression equation in say Y1(x)
Press ENTER to save to get the Regression Equation. Here it is
As you can see I cheated: a perfect parabola. R^2 =1.
And here the best fit represented on same graph as the statistical data
Usually you have to try different regression models, until you find the one that fits best the experimental data.
Posted on Jul 27, 2010
Hey. I had the exact same problem as you and all I could do was reset the settings to the default settings on the calculator. All you have to do is turn the calculator on, his 2nd (it should say mem right above it). Then click reset then RAM.
Posted on Sep 30, 2010
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