Re: Numerical solution of a symbolic equation octave

[Przemek Klosowski]

On 06/12/2015 10:27 AM, Leo07nard wrote:

Thank you for the reply. the problem is solved. But still there is another
problem, for my real work. Please look at these two file I have attached,
they are completely the same, in file exam1 at end of the line 9 I put "g",
and in exam2 I put its equivalent "1+l^2". Surprisingly Octave can solve the
second one but there is an error for the first one!! What is the problem?! 

I didn't look in detail, but you seem to define l in terms of itself:
    l=v^2+p*2+8*l+g;

so you get an "'l' undefined" error