MATLAB Programming

3 Basic Program Components
Advantage of Short-Circuiting. You can use the short-circuit operators
to evaluate an expression only when certain conditions are satisfied. For
example, you want to execute an M-file function only if the M-file resides on
the current MATLAB path.
Short-circuiting keeps the following code from generating an error when the
file, myfun.m, cannot be found:
comp = (exist('myfun.m') == 2) && (myfun(x) >= y)
Similarly, this statement avoids divide-by-zero errors when b equals zero:
x = (b ~= 0) && (a/b > 18.5)
You can also use the && and || operators in if and while statements to take
advantage of their short-circuiting behavior:
if (nargin >= 3) && (ischar(varargin{3}))
Operator Precedence
You can build expressions that use any combination of arithmetic, relational,
and logical operators. Precedence levels determine the order in which
MATLAB evaluates an expression. Within each precedence level, operators
have equal precedence and are evaluated from left to right. The precedence
rules for MATLAB operators are shown in this list, ordered from highest
precedence level to lowest precedence level:
1 Parentheses ()
2 Transpose (.'), power (.^), complex conjugate transpose (’), matrix power
(^)
3 Unary plus (+), unary minus (-), logical negation (~)
4 Multiplication (.*), right division (./), left division (.\), matrix
multiplication (*), matrix right division (/), matrix left division (\)
5 Addition (+), subtraction (-)
6 Colon operator (:)
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