Matrix entering and constants

Error Data Type mean that you entered a value or variable that is the wrong data type:
• For a function (including implied multiplication)
or an instruction, you entered an argument that
is an invalid data type, such as a complex
number where a real number is required. See
Appendix A and the appropriate chapter.
• In an editor, you entered a type that is not
allowed, such as a matrix entered as an element
in the stat list editor. See the appropriate
chapter.
• You attempted to store an incorrect data type,
such as a matrix, to a list.

Here is some help. Please read both parts attentively.

TO COMPUTE STANDARD DEVIATION AND 2-VAR STATISTICS.

I assume you know the theory. I will show you the key strokes

For 1-Var statistics
Press [MODE][3:STAT] [1:1-VAR]. You are ready to enter values in the X column.
Enter a number and press [=]. Cursor jumps to second number to enter.
Keep entering numbers and pressing [=] till all numbers are in. Press the [=] key after the last one.
Press [AC] key to clear the screen.
Press [SHIFT] [STAT] (above digit 1.) then [5:Var]. Screen displays the statistical variables 1:n ;2: x bar; 3: x sigma n; 4:x sigma n-1.
Press the number corresponding to the statistical value you want, ex 1:n . The variable appears on screen. Press [=] and it will be displayed.
To display another variable press [SHIFT][STAT][5:Var][ 1,2, 3, or 4] .

To access the sum of squares sigma x^2 and the sum of data sigma x press[SHIFT][STAT][4:SUM] then [1: for sigma x^2] or [2: for sigma x]. Press [SHIFT][STAT][6:MinMax] to access minX and maxX.

For 2-var statistics
To perform 2 variable statistics you press [MODE][3:STAT] and any of the other regression options (except 1:1-Var). A two column template opens where you enter the X and Y values. When finished entering data, press [SHIFT][STAT][5:Var]. to access the different statistics. As I assumed above, you should be able to recognize what each variable means.

ABOUT MATRICES

This post is rather exhaustive as regards the matrix capabilities of the calculator. So if the post recalls things you already know, please skip them. Matrix multiplication is at the end.

Let me explain how to create matrices. (If you know how to do it, skip to the operations on matrices, at the end.)

First you must set Matrix calculation
[MODE][6:Matrix]. Then By entering one of the numbers [1:MatA] or [2:Matb] or [3:MatC] you get to choose the dimensions of the matrix
(mxn]. Once finished entering the matrix you clear the screen.
The operations on matrices are available by pressing [Shift][Matrix]
[1:Dim] to change the dimension of a matrix (in fact redefining the matrix)
[2:Data] enter values in a matrix
[3:MatA] access Matrix A
[4:Matb] access Matrix B
[5:MatC] access matrix C
[6:MatAns] access the Answer Matrix (the last matrix calculated)
[7:det] Calculate the determinant of a matrix already defined
[8:Trn] The transpose of a matrix already defined

To add matrices MatA+MatB (MUST have identical dimensions same m and same n, m and n do not have to be the same)
To subtract MatA-MatB. (MUST have identical dimensions, see above)
To multiply MatAxMatB (See below for conditions on dimensions)
To raise a matrix to a power 2 [x2], cube [x3]
To obtain inverse of a SQUARE MatA already defined MatA[x-1]. The key [x-1] is the x to the power -1 key. If the determinant of a matrix is zero, the matrix is singular and its inverse does not exit.

Dimensions of matrices involved in operations must match. Here is a short summary

The multiplication of structured mathematical entities (vectors, complex numbers, matrices, etc.) is different from the multiplication of unstructured (scalar) mathematical entities (regular numbers). As you well know matrix multiplication is not commutative> This has to do with the dimensions.

An mXn matrix has m rows and n columns. To perform multiplication of an kXl matrix by an mXn matrix you multiply each element in one row of the first matrix by a specific element in a column of the second matrix. This imposes a condition, namely that the number of columns of the first matrix be equal to the number of rows of the second.
Thus, to be able to multiply a kXl matrix by am mXn matrix, the number of columns of the first (l) must be equal to the number of rows of the second (m).

So MatA(kXl) * MatB(mXn) is possible only if l=m
MatA(kX3) * Mat(3Xn) is possible and meaningful, but
Mat(kX3) * Mat(nX3) may not be possible.

To get back to your calculation, make sure that the number of columns of the first matrix is equal to the number of rows of the second. If this condition is not satisfied, the calculator returns a dimension error. The order of the matrices in the multiplication is, shall we say, vital.

Here is a detailed account of how to calculate the determinant of a square matrix.

I assume you know how to define your matrix, but I will repeat it here for others who might not know. You can skip to Calculation
1.Turn Calculator ON. If there are no icons, press [MENU].

Data Entry
2.Use arrows to highlight [MAT] icon. Press [ENTER]
3.Highlight the first line where it says Mat A. Use the right arrow to enter the dimensions of Matrix A. Enter 3 and press [EXE]. The cursor moves to the second dimension. Press 3 and press [ENTER].
4. The matrix entry screen appears.
5. Enter first matrix coefficient a_11 and press [ENTER]
6. Enter a_12 and [ENTER]
.....
Key in last coefficient a_33 and press [ENTER]

Calculation
Press [MENU] and [RUN]
Press [OPTN][F2:MAT][F3:Det] Command echoes on screen as det
Press [F1:Mat] echoes on screen as Mat; screen shows det Mat
Press [ALPHA] A The screen displays det Mat A
Press [ENTER] to calculate the determinant.

If the matrix is not square, you cannot calculate its determinant.

When you press MODE 6 for Matrix, you're clearing any previously entered matrices. So, you're clearing MatA when you go to enter MatB.

Instead, after entering MatA press SHIFT 4 to bring up the Matrix menu, press 1 for DIM, press 2 for MatB, press 5 for 2x2, and enter the data.

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.

I do not know what you mean exactly by DATA. They might be formulas you want to enter without your teacher knowing about them. In that hypothetical case i wont't answer. Awfully Sorry!

Bu if the data actually refers to numerical values you want to store in lists, matrices or other mathematical objects, the procedure is simple.

Open the object you want to use (list, matrix ,etc.) edit the object to enter or modify the values, click EXE after each entry and press [SHIFT][QUIT] to quit the entry screen.

In the following screen capture I show a 3X3 matrix. (MatA)



As long as the memory is not erased by a hardware RESET or a soft reset and batteries are good, your data will reside in the calculator Memory

Hello,
I assume you know how to enter data in your calculator.
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.
.

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. Th graph remind me of a parabola (I know I chose the exact values)



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 QuadReg quadratic regression, 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 Equatio. 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 satistical data



Usually you have to try different regression models, until you find the one that fits best the experimental data.
As you can see I have gone a long way out of my way to show you all the steps.
I hope it helps you and others who wonder how to do regressions on a TI89. If someone does not understand these explanations, the blame does not rest with me.

Hello,
First stop the application that is running [2nd][Quit] or [Escape]
From Home screen
[Apps][Data/Matrix Editor/][3:new] name the data set when asked.
A table is displayed Enter the values in list c1 and c2 You can rename the variables in header.
When finished press [F5:calc]
In calculation type right arrow select 5:linReg in front of x enter c1, in front of y enter c2 and [enter] to save. the equation shows when you press [ENTER]

Hope it helps.

Hi there. My name is Alex and Im here to help solve your problem.

Can you boot into windows via safe mode?? If you can then great, you can enter safe mode by constantly pressing F8 before windows boots then selecting safe mode. Once in safe mode, you can take off any important data. If this is sucessful then all you have to do is format your computer by reloading windows once your data has been taken off.

If this doesnt allow you into safe mode, then dont worry, you can take out your hard drive and put it into another computer if you have one or know someone who has one, set the jumper of the hard drive to 'slave' and take off all your data like that.

If you have 2 partitions on your computer, for example if you have your hard drive divided into 2 parts, then even better as you can save all your data to the secondry partition and only format the c partition (the partition where windows is saved) normally c.

Please let me know if you have any questions.

Hello,
I can't locate any information regarding an HP 8s Scientific Calculator, but I can locate information on a HP 9s Scientific Calculator. Perhaps they are similar in function. From the HP web site, please check out the link below.

I hope this helps!
- CBR2009

http://h10032.www1.hp.com/ctg/Manual/bpia5267.pdf