when i run...?the command page write Undefined function????

clear all;
clc
a=input('enter fun')
f=inline(a)
x(1)=input('enter first guess: ');
x(2)=input('enter second guess: ');
n=input('enter tolerance: ');
iteration=0;
i=2;

while (abs(x(i))>0.00001)
    x(i+1)=x(i)-f(x(i))*(x(i)-x(i-1))/(f(x(i)-f(x(i-1))));
    if (f(x(i+1))~=0)
        i=i+1;
        iteration=iteration+1
        root=x(i)
        break
    else
        root=x(i)
        iteration=iteration
        break
        break
    end
end

[Stephen23]

@masoud mansouri: can you please post the complete error message. This means all of the red text. It contains lots of useful information for us.

Answer 1

[Star Strider]

If you want to use the input function to input a string (that your inline call will use), you need to add 's' to the prompt:

a=input('enter fun', 's')

[masoud mansouri]

which means ('s')..could you write correct...?

[Star Strider]

I wrote the correct input call in my original Answer. Insert my ‘a’ assignment in place of yours and it should work correctly:

a=input('enter fun', 's')