[matlab] matlab drawing operation skills

matlab Matrix operations

Semiotic operation

Reference resources ：MATLAB Basis of symbolic operation
In mathematics , If the result of the operation is a numerical value , This kind of operation can be called numerical operation ; If the result of the operation is an expression , stay MATLAB It is called symbolic operation in , Symbolic computation is performed on an unassigned symbolic object ( It can be a constant 、 Variable 、 expression ) To perform operations and processes .MATLAB Mathematical toolbox with symbols (SymbolicMath Toolbox), Combine symbolic operations with MATLAB Numerical computing environment . The symbolic mathematics toolbox is built on Maple Software based .

There are two ways to create symbolic variables , application , application sym And syms function , Usually used sym Establish symbolic expression , application syms Define multiple symbolic variables at the same time .

Create symbolic variables -sym And syms function

a = sym('a');     % Define symbolic variables a, The same below 
b = sym(