Why do I get the error "Identifier 'D' is not a function or a shared variable. To share 'D' with nested function, initialize it in the current scope"?

I got this matlab toolbox called WAFO (Wave Analysis for Fatigue and Oceanography) and when I try to use one of their function files (see attached file), I get the following error:

"Identifier 'D' is not a function or a shared variable. To share 'D' with nested function, initialize it in the current scope. For more information, see Sharing Variables Between Parent and Nested Functions."

I checked this document but I could not resolve the issue. I would highly appreciate if anyone could use this function file with the inputs stated in the comments in the file and help me solve this problem. (I know it's a fairly long file but the error is to do with only 1 variable).

[Image Analyst]

In

[yy,p]= cssmooth(x,y,p,xx,LinExtrap,d2)

what did you pass in for all those variables? Maybe you need to pass in D also.

[tng]

Thank you for responding @Image Analyst, I personally didn't code this up but I ran their example, which is this:

% Example:%
x = linspace(0,1).';
y = exp(x)+1e-1*randn(size(x));
pp = cssmooth(x,y,.9); 
plot(x,y,x,cssmooth(x,y,.99,x,0,0.01),'g',x,ppval(pp,x),'k',x,exp(x),'r');

If you go to line 209, D is defined there, inside a nested function.

[Keith Adams]

I hvae this error too - did you get a resolve tng?

[tng]

@Keith Adams Yeah, I basically edited line 141 and wrote this:

  [u,D] = computeU(); 

It used to output only u. In addition to this, I edited a nested function (line 203) with the following line:

  function [u,D] = computeU()

Hope this helps. Also if you are using WAFO like me, I cannot guarantee this is what the person who created this toolbox intended to do. But it seems to be working and I get their results (I think).

Answer 1

[Keith Adams]

I resolved this issue by defining D in the main cssmooth function ...

Hope this helps

[tng]

Thanks