Texas Instruments TI-84 Plus Calculator Logo
A
Anonymous Posted on Mar 06, 2014
Answered

Calculator error whenever I type in my calculator the [A]^-1, it always says "err: SINGULAR MAT" but I have my numbers in Matrix A, so what is the problem??

Answer This Question

1 Answer

julievelor

Level 1:

An expert who has achieved level 1.
MVP:

An expert that got 5 achievements.
Habit-Forming:

Visited the website for 3 consecutive days.
New Friend:

An expert that has 1 follower.

  • Contributor 23 Answers
  • Posted on Mar 06, 2014
julievelor
Contributor
Level 1:

An expert who has achieved level 1.
MVP:

An expert that got 5 achievements.
Habit-Forming:

Visited the website for 3 consecutive days.
New Friend:

An expert that has 1 follower.

Joined: Aug 09, 2010
Answers
23
Questions
5
Helped
3227
Points
80

What's the determinant of the numbers in matrix A? A singular matrix is a matrix whose determinant is zero.

3 Related Answers

Anonymous

  • 3 Answers
  • Posted on Feb 04, 2009

SOURCE: Singular matrix error

I had this problem as well...Were you working on a SinReg equation by any chance? I was able to do every other type of regression (Linear, quadratic, cubic, ect..) In order to get Sinusoidal regression you need to make sure you arrow down to the Period box when entering the equation, and fill it in with the number of items in your table of values (a ten item list means a period of 10). That was the fix for me, so hopefully it works for you!

Ad

Anonymous

  • 1 Answer
  • Posted on Jun 06, 2009

SOURCE: ERR:SINGULAR MAT when finding inverse of matrices

If a matrix has a determinant of 0, this error appears. If you get this error, your matrix doesn't have an inverse.

Anonymous

  • 20 Answers
  • Posted on May 01, 2010

SOURCE: I am trying to do SinReg but my calculator wont let me! HELP!!!!!

your value is not within the domain of the function, that is why it's giving you that error message, try the value times -1, or -(your value)

Add Your Answer

×

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

0helpful
1answer

How to solve an inverse of matrices
You must be in the RUN screen.
Press Menu
Press 1:Run
Press OPTN
Under tab F2:Mat you get the MAT tab.

To invert a non-singular matrix A (a matrix with non-zero determinant) you, on the command line type in
Mat A then press the [x^-1] key. The [x^-1] is the shifted function of the right parenthesis.

0d100874-9ad9-434c-9c55-b1502275425d.png
Read full answer
Mar 25, 2014 • Casio FX-9750GPlus Calculator
0helpful
1answer

Rref for 4X4 matrix does not answer correctly
To make sure that the calculator is misbehaving, I suggest that you create a simple 4X4 matrix, that is not singular, and calculate it reduced row echelon form by hand, then use the calculator to perform the reduction. You can also generate a random 4x4 matrix and calculate the rref forms by hand and with the calculator. If the calculator is defective, try to upgrade the OS. If it is still defective, well, the deck is stacked aaginst you. It may then be time to get another one or to send it for repairs.
Read full answer
Jan 18, 2012 • Texas Instruments Office Equipment &...
0helpful
1answer

I am unable to solve determinant of matrix.
Here is enough to get you started and a little more.
Read the post ant consult your calculator manual.
How to calculate the determinant of a (square, non-singular) matrix is described in part B

A. Define a matrix (Create it)
  1. Turn calculator ON.
  2. Press Menu,select the MAT icon and press [EXE]
  3. You see a list of possible matrix labels (A, B, C,D,E,F)
  4. All that have not been created have a "none" to their right
  5. Highlight a matrix name and press the right arrow. Where there was "none" , you have a template 0x0.
  6. That is where you specify the dimensions (mxn). example. 2x2
  7. Enter the first dimension and press [EXE]
  8. Enter the 2nd dimension and press [EXE]
  9. A matrix template opens where you enter the coefficients left to right and up down.
  10. After each coefficient press [EXE]. Cursor moves to the next coefficient, etc.
Press [SHIFT][QUIT] to return to the list of matrices to create new ones

B Operations on matrices
Once you have one matrix, you can do operations on it: Calculate the determinant (if matrix is square), calculate its inverse, transpose, augment it, fill it, etc..
  1. These operations are accessed as follows.
  2. Quit the matrix editor by pressing [Menu] and selecting the [Run] application.
  3. Press [OPTN][F2:MAT]
  4. You have the menus Mat,M(atrix)->L(ist), Det(erminant), Trn (transpose), Aug(ment) ->, Iden(tity),Dim(ension) Fill
Example : calculate the determinant of a matrix A (already defined).
  1. You press the [OPTN][F2:MAT] key sequence (just above)
  2. Press [F3:Det]; the command det is displayed on screen.
  3. Press [F1:Mat] the identifier Mat is displayed.
  4. Press [ALPHA] A; screen display det Mat A.
  5. Press [EXE] to get the value of the determinant.
C. Square of Matrix A
[OPTN][F2:MAT] (MAT) [Alpha] A ^2 [EXE]

D. Product of two compatible matrices MatAXMatB
[OPTN][F2:MAT] (MAT) [Alpha] A [*] (MAT) [ALPHA] B [EXE]

k24674_10.jpg

Part E Invert a (square, non singular) matrix that was already defined.

Press [OPTN] [F2:Mat] to open a screen similar to the one in capture above
Press [F1:Mat] to have identifier Mat displayed.
Enter the name of the matrix by pressing [ALPHA] A, for example.
Press [SHIFT] [ ) ] activate the (x^-1) key.

This is what you might see (with parentheses and without).
k24674_31.jpg

Press [EXE] button to calculate the inverse.
Read full answer
Apr 08, 2011 • Casio FX-9860G Graphic Calculator
1helpful
1answer

How do i solve systems of linear equations with matrix? I set up the matrix A and B but how do i do A ^-1 B?
Suppose square matrix A and compatible matrix B, and that Mat A is non-singular.
  1. Press [MENU] key and go to RUN screen.
  2. Press [F2:MAT] to access the matrix tabs
  3. Press F1:Mat]. The Mat identifier is entered on the command line.
  4. Press [ALPHA] key then A
  5. Command line now shows Mat A.
  6. Press [SHIFT][ )] to activate [X^-1]
  7. Press [*] multiplication key then [ALPHA] and B.
  8. Command line now shows Mat A^-1 * Mat B.
  9. Press [EXE] to display the result.
Read full answer
Apr 06, 2011 • Casio FX-9750GPlus Calculator
3helpful
1answer

Hoe to calculate a inverse matrix?
Sorry if post is too long. Skim through it to find the inverse of a matrix in part at the end:Part E

Note: Matrix must be square (nXn) and non singular (its determinant not equal to zero)

A. Define a matrix (Create it)
  1. Turn calculator ON.
  2. Press Menu,select the MAT icon and press [EXE]
  3. You see a list of possible matrix labels (A, B, C,D,E,F)
  4. All that have not been created have a "none" to their right
  5. Highlight a matrix name and press the right arrow. Where there was "none" , you have a template 0x0.
  6. That is where you specify the dimensions (mxn). example. 2x2
  7. Enter the first dimension and press [EXE]
  8. Enter the 2nd dimension and press [EXE]
  9. A matrix template opens where you enter the coefficients left to right and up down.
  10. After each coefficient press [EXE]. Cursor moves to the next coefficient, etc.
At the bottom of the screen you have 3 menus for Row and column manipulations. But those will have to wait for now.
Press [SHIFT][QUIT] to return to the list of matrices to create new ones

B Operations on matrices
Once you have one matrix, you can do operations on it: Calculate the determinant (if matrix is square), calculate its inverse, transpose, augment it, fill it, etc..
  1. These operations are accessed as follows.
  2. Quit the matrix editor by pressing [Menu] and selecting the [Run] application.
  3. Press [OPTN][F2:MAT]
  4. You have the menus Mat,M(atrix)->L(ist), Det(erminant), Trn (transpose), Aug(ment) ->, Iden(tity),Dim(ension) Fill
Example : calculate the determinant of a matrix A (already defined).
  1. You press the [OPTN][F2:MAT] key sequence (just above)
  2. Press [F3:Det]; the command det is displayed on screen.
  3. Press [F1:Mat] the identifier Mat is displayed.
  4. Press [ALPHA] A; screen display det Mat A.
  5. Press [EXE] to get the value of the determinant.
C. Square of Matrix A
[OPTN][F2:MAT] (MAT) [Alpha] A ^2 [EXE]

D. Product of two compatible matrices MatAXMatB
[OPTN][F2:MAT] (MAT) [Alpha] A [*] (MAT) [ALPHA] B [EXE]

k24674_10.jpg

Part E Invert a (square, non singular) matrix that was already defined.

Press [OPTN] [F2:Mat] to open a screen similar to the one in capture above
Press [F1:Mat] to have identifier Mat displayed.
Enter the name of the matrix by pressing [ALPHA] A, for example.
Press [SHIFT] [ ) ] activate the (x^-1) key.

This is what you might see (with parentheses and without).
k24674_31.jpg

Press [EXE] button to calculate the inverse.
Read full answer
Feb 25, 2011 • Casio FX9750GII Graphic Calculator
1helpful
4answers

In casio fx-991ES, i am able not to get the matrix multiplication as well as inverse when i do so get math error.
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.
Read full answer
Dec 18, 2010 • Casio FX-115ES Scientific Calculator
0helpful
1answer

On my ti 84 every time I try to calculate the inverse of my 3x3 matrix it says ERROR: SINGULAR MAT. what should I do?
A singular matrix has no inverse. It's the equivalent of zero: trying to take the inverse of zero is an error. Check the matrix to make sure you have entered it correctly. If the error persists, could you post the matrix in question?
Read full answer
Dec 10, 2010 • Texas Instruments TI-84 Plus Calculator
0helpful
2answers

I am trying to do SinReg but my calculator wont let me! HELP!!!!!
your value is not within the domain of the function, that is why it's giving you that error message, try the value times -1, or -(your value)
Read full answer
May 01, 2010 • Texas Instruments TI-89 Calculator
5helpful
1answer

ERR:SINGULAR MAT when finding inverse of matrices
If a matrix has a determinant of 0, this error appears. If you get this error, your matrix doesn't have an inverse.
Read full answer
Jun 02, 2009 • Texas Instruments TI-84 Plus Silver...
0helpful
1answer

Can't do inverse of matrices
The problem is with the data. The calculator is telling you that your matrix is singular. Inverting a singular matrix is analogous to dividing by 0. Just as you can't divide by 0, you can't invert a singular matrix.

If you think that the inverse exists, double check the entries in the matrix.
Read full answer
Apr 19, 2009 • Texas Instruments TI-83 Plus Calculator
Not finding what you are looking for?

View Most Popular

TI-84 Plus Calculator

  • Office Equipment & Supplies

Related Question

How to solve an inverse of matrices

  • Casio FX-9750GPlus Calculator

Related Topics

281 views

Ask a Question

Usually answered in minutes!

Popular Questions

Error: Invalid Dim

Texas Instruments TI-83 Plus...

"RAM Cleared"?

Texas Instruments TI-84 Plus Silver...

HOW TO FIND CUBE ROOT

Texas Instruments TI-86 Calculator

How to find the Cube

Texas Instruments TI-30 XIIS...

Ti-89 gives error of "Undefined Variable"

Texas Instruments TI-89 Calculator

Check Out the Latest Printers Report
Check Out the Latest Printers Report

View all Fixya Reports

Top Texas Instruments Office Equipment & Supplies Experts

k24674

Level 3 Expert

8093 Answers

Jerry Naidoo

Level 2 Expert

152 Answers

Paul Bade

Level 3 Expert

1818 Answers

Are you a Texas Instruments Office Equipment and Supply Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

PDF Manual
Chinese.pdf. user-manual-TI-84 Plus...

TI-84 Plus...

PDF Manual
Danish.pdf. user-manual-TI-84 Plus...

TI-84 Plus...

PDF Manual
Dutch.pdf. user-manual-TI-84 Plus...

TI-84 Plus...

Loading...