Function definitions are not permitted in this context.

I am having this error "Function definitions are not permitted in this context." writing this

A = spdiags([-1 a11 0;ones(n-2,1)*[-1 2 -1];0 a11 -1],-1:1,n,n)'/h^2;

Answer 1

[Image Analyst]

You have probably combined a function and a script in the same m-file. You can't do that. If your script is called test.m, and has MyFunction defined in it some where, then make sure this is the first line of your test.m

function test()

[Azam Rashdi]

Thanks Image I manage to get rid of that now having another problem,

tf = dt*nt; % final time

Not enough input arguments.

Error in navierstokes (line 4) tf = dt*nt; % final time

can you help in this regards

[Image Analyst]

You forgot to paste the actual error message. Maybe you want dt.*nt - I have no idea.