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12:04 ص | Posted by
monia moon |
MATLAB Basics3( تابع اساسيات الماتلاب)
third
Matrices and Vectorsالمصفوفات والمتجهات
A matrix is a two-dimensional rectangular array of real or complex numbers
I. Entering matrices from command line or m-file
To enter a matrix, you have only to follow a few basic conventions:
•Separate the elements of a row with blanks or commas.
•Use a semicolon to indicate the end of each row.
•Surround the entire list of elements with square brackets, [ ].
Example:
Notes•
1)
The element in row i and column j of matrix A is denoted by A(i,j) (row-column subscript).
•It is also possible to refer to the elements of a matrix with a single subscript, A(k), (element columwise index)
.•"end" specifies maximum index value.
.Any MATLAB expression can be entered as a matrix element
.If you store a value in an element outside of the matrix (using row-column subscript only), the size increases to accommodate the newcomer, for example :
4)
.If you try to use the value of an element outside of the
matrix,for example:
II. Generating Matrices Using Built-in Functions
Example:
III. Concatenation
Concatenation is the process of joining small matrices to make bigger ones. The pair of square brackets, [ ], is the concatenation operator. For example
Example:
IV. Empty Matrices
It is a matrices and arrays where one, but not all, of the dimensions is zero.
-To define an empty matrix
(U=[ ] or E = zeros(0,5
To be continued ……..
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