For Casio Graphic Calculators

Dimensioning Lists and Matrices within a Program

If you know before the program starts what the dimension of a matrix is going to be then the program can create the matrix by just assigning values: e.g. [[1,2,3][4,5,6][7,8,9]]->Mat A will create a 3x3 matrix with the given entries.

However if you don't know beforehand and the dimension will depend on user input while the program is running then the following information will apply:

On the later models such as 9970 and 9850plus you can make the program set up the dimension of lists and matrices like so: (Dim is on menu: optn f1 f3)

9->Dim List 1	; a list with 9 entries

{3,4}->Dim Mat A	; a 3 x 4 matrix

On 9850 and similar models the above doesn't work but there are tricks available to set up the dimension from within a program.

Seq(0,X,1,9,1)->List 1        ; a list with 9 entries

To dimension a matrix is quite convoluted. The following creates a matrix with R rows and C cols in Mat Ans

Seq(0,R,1,R,1->List 1
List->Mat(List 1)             ; List->Mat( is on menu: optn f1 f2
Mat Ans->Mat A
For 2->J To C                 ; you could use any variable in place of J
Augment(Mat A,Mat Ans         ; Augment( is on menu: optn f2 f5
Next

Or if you want a square matrix you can use 0Identity N which first creates an NxN identity matrix, and multiplying it by zero, zeros all elements.

On old models such as 7700GE and 9700GE you have to set up the dimension of matrices manually, before running a program that uses matrices.

On even older models such as 7700GB you cannot use matrices in a program at all.

On oldest models such as 7000G there is no matrix facility.