Inputting an equation as a variable

hello. i need a way to have the user input an equation as a variable and then have it evaluate that function at various points during a for loop. please help

K=input('input equation') For N=1:1:4 ANSWER(N)=K(N)

Answer 1

[dpb]

No need; if you set the input vector prior to calling input and your user can enter an executable Matlab statement, input evaluates the input string with workspace variables in existence at the time. Simple example:

>> x=1:4;  % execute before calling INPUT
>> res=input('Enter eqn of form f(x): ')
Enter eqn of form f(x): 2*x.^2
res =
   2     8    18    32
>>