Symbolic matlab toolbox

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Presentation transcript:

Symbolic matlab toolbox Dr vahidipour --- -----

Symbolic Math Toolbox

Symbolic Variables, Expressions, Functions, and Preferences

Create Symbolic Variables & Create Symbolic Vector & Create Symbolic Matrices

Argnames & formula formula :Mathematical expression defining symbolic function Argnames :Input variables of symbolic function

children Subexpressions or terms of symbolic expression symbolic Examples: Find the child subexpressions of this expression. Find the child subexpressions of this equation. Find the child subexpressions of this inequality.

pretty Prettyprint symbolic expressions

Has Description Check if expression contains particular subexpression has(expr,subexpr) returns logical 1 (true) if expr contains subexpr. Otherwise, it returns logical 0 (false). If expr is an array, has(expr,subexpr) returns an array of the same size as expr. The returned array contains logical 1s (true) where the elements of expr contain subexpr, and logical 0s (false) where they do not. If subexpr is an array, has(expr,subexpr) checks if expr contains any element of subexpr.

symvar Find symbolic variables in symbolic expression, matrix, or function symvar(s) can return variables in a different order than symvar(s,n). symvar does treat the constants pi, i, and j as variables. If there are no symbolic variables in s, symvar returns the empty vector.

Linear and Nonlinear Equations and Systems

Graphics

fcontour(f) plots the contour lines of symbolic expression f(x,y) over the default interval of x and y, which is [-5 5]

fmesh(f) creates a mesh plot of the symbolic expression f(x,y) over the default interval [-5 5] for x and y.

fsurf(f) creates a plot 3-D surface of the symbolic expression f(x,y)