Hi All, I am a debutant in MATLAB. I am trying to define a symbolic derivative inside a nested function and then pass its handle to command window by calling the parent function. However, when I evaluate the nested function at a certain value from the command window, I get an error as shown further below.
function [f,f_d] = setFunctions_trial
f = @func;
function y = func(x)
y = x^2;
end
f_d = @func_deriv;
function y = func_deriv(x)
syms g(s)
g(s) = f(s);
df = diff(g,s);
y = df(x);
end
end
>> clear all
>> [f,f_d] = setFunctions_trial;
>> f(2)
ans =
4
>> f_d(2)
Error using assignin
Attempt to add "s" to a static workspace.
See Variables in Nested and Anonymous Functions.
Error in syms (line 312)
assignin('caller', y, ysym);
Error in setFunctions_trial/func_deriv (line 9)
syms g(s)
For my purpose I only need symbolic derivative of the func(x) being available in command window or in another script. It need not be inside a nested function. Any other suggestions are welcome.
Thankyou,
Sid
