prompt user to reenter function

If user enters a fuction with mistake, how can we prompt the user to reenter function.

funstr = input('Please enter your function in format: 4*x^3 + 2*x^2 + x + 5: ', 's')

f = str2func( ['@(x) ' funstr ] )

Thanks in advance

Answer 1

[Adam Danz]

See examples,

• Use a wrapper fcn to re-prompt user if input is empty
• Input must be 1 letter
• Input must be Yes|No