Allocates Matrix (C.Basic)

 Allocate Matrix

<C.Basic>

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This content is checked by fx-9860GII (OS 2.04).

This is on-going project, any changes may be made.

Model

fx-9860G Series

Syntax

Compatible with Casio Basic
1. {<row>,<column>}→Dim A     (Allocates matrix)

Compatible + Extended (see Note below)
2. [[<E₁₁>,<E₁₂>, ...][<E₂₁>,<E₂₂>, ...] ... ]→Mat A  (Allocates & Initializes Matrix)

Extended (see Note below)
3. [["<string 1>"]["<sring 2>"] ... ]→Mat A    (Allocates & Initializes Matrix)

Compatible with Casio Basic
4. ClrMat Mat A    (Releases matrix)

Key Press

Dim       [F3](CMD) --> [down]/[up] --> [9](9:Dim)
Mat        [SHIFT][2] 

ClrMat   [F3](CMD) --> [down]/[up] --> [9](9:ClrMat)

Function

1. Allocates memory for Matrix by setting of row and column number (m, n).
2. Allocates and initializes Matrix by setting every elements (<E_ij>).
3. Allocates and initializes Matrinx by setting strings ("<string n>")
4. Releases Matrix memory region.

Description

1. User must allocate memory for a matrix before initialize and use it.
2. It's recommended that user release the allocated memory for matrix before end of program. Otherwise the allocated memory reamains until the same matrix is allocated or initiaized again.
3. <E_ij> means an element at row i and column j (see Example 1).
4. User can use strings <string n> to allocate and initialize a matrix (see Example 2 & 3).

Note

Example 1

C.Basic allows user to use carriage return and space within [ ]. Allocating and initializing a matrix in the following way is good for easy-to-read sorece code;

    [
      [0x1234,0x2345,0x3456]
      [0x4567,0x5678,0x6789]
      [0x789A,0x89AB,0x9ABC]
    ]→Mat A

User can explicitly write a constant in hexadecimal or binary expression by adding prefix "0x"/"0X" or "0b"/"0B" subsequently. 


Example 2

Extended usage of matrix helps strings operation, see following sample;

    [
      "1:ABC",
      "2:DEF",
      "3:GHI"
    ]→Mat S
    Locate 1,2,&Mat S[1]
    Locate 1,3,&Mat S[2]
    Locate 1,4,&S[3]
    Locate 1,5,&S[1,3]
    Clrmat

This code dislays as follows;

    1:ABC
    2:DEF
    3:GHI
    ABC

This way is similar to string handing of C language. Instead of & user can use $.
User can write S[ ] instead of Mat S[ ]. 


Example 3

    [
      "ABCD",
      "EFGH"
    ]→Mat B
    Locate 1,1,B[1,1]:Locate 4,1,B[1,2]
    Locate 7,1,B[1,3]:Locate 10,1,B[1,4]:Locate 13,1,B[1,5]
    Locate 1,2,B[2,1]:Locate 4,2,B[2,2]
    Locate 7,2,B[2,3]:Locate 10,2,B[2,4]:Locate 13,2,B[2,5]
    
This code displays as follows;

    65 66 67 68 0
    69 70 71 72 0

Each element is a charactor code of each alphabet. When allocate the matrix in this way using strings, the matrix is 2 rows x 5 columns, not 2 rows x 4 column. each row corresponds to each string and 0 (zero) is automatically added in the last column. 

See also: Initialize Matrix, <number>->Mat A, <string>->Mat A, '#Str

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