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Posted on Jan 02, 2017
Calculator should be in [MATRIX] MODE
Try the matrices 2X2 matrices matA [1,2,3,4] matB [5,6,7,8], Add them, subtract them, multiply them, take the square of each. If that works for these matrices, then it must be your data. Be careful with negative numbers. To enter those, you must use the change sign (-).
There is also the possibility that the instructions were misread.
Posted on Dec 15, 2009
This is not an "Operating Systems" question!
(-5 7) (x y) = (9)
(1 10) (x y) = (21)
(-5 7) (x y) = (9)
(5 50) (x y) = (105)
(0 57) (x y) = (114)
(1) (y) = (2)
(1) (x) = (1)
Posted on Mar 02, 2010
Dimensions of matrices involved in operations must match.
Here is a short summary
You can only add and subtract matrices that have the same dimensions: the numbers of rows must be equal, and the number of columns must be equal.
The multiplication of structured mathematical entities (vectors, complex numbers, matrices, etc.) is different from the multiplication of unstructured (scalar) mathematical entities (regular umbers). 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).
Let there be two matrices MatA and MatB. The dimensions are indicated as mXn where m and n are natural numbers (1,2,3...)
The product MatA(kXl) * MatB(mXn) is possible only if l=m
MatA(kX3) * MatB(3Xn) is possible and meaningful, but
MatA(kX3) * MatB(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.
Posted on Oct 30, 2010
SOURCE: how do you add matrices
Here is enough to get you started and a little more.
Read the post ant consult your calculator manual. The screen captures below may not look exactly as your calculator but the steps are identical.
A. Define a matrix (Create it)
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..
[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]
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).
Press [EXE] button to calculate the inverse.
Posted on Apr 07, 2011
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