??? Undefined function or method 'dsip' for input arguments of type 'double'.

Hi guys, When i try to run this code i get an error says: ??? Undefined function or method 'dsip' for input arguments of type 'double'.

syms x x1 x2 x3 x4 x5 x6 x7 
i=1;
for j=0:2/6:2
    x(i)=j;
    i=i+1;
 end 

for k=1:1:7
    l(k)=1;
    for n=1:1:7
        if n~=k;
        l(k)=l(k)*((x-x(n))/(x(k)-x(n)));
        end
        dsip(l(k));
    end

and if i just delete the disp function I get an other error says: ??? In an assignment A(I) = B, the number of elements in B and I must be the same. end

Answer 1

[Sean de Wolski]

Are you by any chance looking for disp rather than dsip?

Also, I recommend avoiding using l (lower-case L) as a variable since it looks like a 1 or an l and this can frequently cause confusion. I think this might be the source of your other error as well.

Answer 2

[Wayne King]

Did you mean disp()?

For your other error:

You have

   l(k)=l(k)*((x-x(n))/(x(k)-x(n)));

But x is not a scalar. You are making the following mistake

 x(1) = zeros(2,1);

[Abdulaziz]

thank you I made mistake in printing disp.

But x(n) and x(k) has a values and I want to keep x as a variable.