Hi there,

I have the following minor problem; 

I have a function f=x^3 + x - 1 (using x as symbolic value (syms x)) after computing the dirivative using: ff=diff(f,x)

i want to create a for loop x=1:3 and fill in the x in the ff Eguation how can i do this?

thanks in advance!

code:
syms x
f=x^3 + x - 1;
ff=diff(f,x)
for x=1:3
ff(x)
end

On 10-12-02 03:44 PM, Paul wrote:

> I have the following minor problem;
> I have a function f=x^3 + x - 1 (using x as symbolic value (syms x))
> after computing the dirivative using: ff=diff(f,x)
>
> i want to create a for loop x=1:3 and fill in the x in the ff Eguation
> how can i do this?
>
> thanks in advance!
>
> code:
> syms x
> f=x^3 + x - 1;
> ff=diff(f,x)
> for x=1:3
> ff(x)
> end

Instead of ff(x), you would use

subs(ff)

This would be suitable for displaying the value. If you need to do numeric 
computations on it, then use

double(subs(ff))

Thanks for your help!