Differentiating a user input equation

Hey guys, I took a user input equation as string and convert it into inline function Is there any way to differentiate it ,as i am unable to find any command to convert inline function into symmetric and then use diff command.

Answer 1

[Ronit]

Hello Kushagra,

To differentiate an equation given in string form, you can convert it to a symbolic expression in MATLAB. This allows you to use the ‘diff’ function directly on the expression. Here's an example of how you can do this:

equationStr = 'x^2 + 3*x + 2';

% Convert the string to a symbolic expression
syms x; % Declare x as a symbolic variable
equationSym = str2sym(equationStr);

% Differentiate the symbolic expression with respect to x
dEquationSym = diff(equationSym, x);
disp(dEquationSym);

Please find a more formal description of the ‘str2sym’ function, which is part of MATLAB's Symbolic Math Toolbox: https://www.mathworks.com/help/symbolic/str2sym.html

Please refer to the following documentation for more information regarding MATLAB's Symbolic Math Toolbox: https://www.mathworks.com/help/symbolic/index.html?s_tid=CRUX_lftnav

I hope it resolves your query!