我编辑的matlab函数老是出现这种问题：Error using spirallength (line 9) Not e

我编辑的matlab函数老是出现这种问题：Error using spirallength (line 9) Not enough input arguments.function varargout = spirallength(d,n,varargin)%SPIRAL \x09\x09\x09\x09\x09画出螺旋线或螺旋条带Nin = length(varargin) + 1;% error(nargchk(1,Nin,nargin))if nargout > 1error('Too many output arguments!')endj = sqrt(-1);phi = 0:pi/20 :n*2*pi;amp = 0:d/40 :n*d;spir = amp .* exp(j*phi);if nargout==0switch Nincase 1plot(spir,'b')case 2d1=varargin{1};amp1 = (0:d/40 :n*d) + d1; spir1 = amp1 .* exp(j*phi);plot(spir,'b');hold on;plot(spir1,'b');hold offotherwise d1=varargin{1};amp1 = (0:d/40 :n*d) + d1; spir1 = amp1 .* exp(j*phi);plot(spir,varargin{2:end});hold on;plot(spir1,varargin{2:end});end;axis('square')elsephi0 = 0:pi/1000 :n*2*pi;amp0 = 0:d/2000 :n*d;spir0 = amp0 .* exp(j*phi0);varargout{1} = sum(abs(diff(spir0)));if Nin>1d1=varargin{1};amp1 = (0:d/2000 :n*d) + d1; spir1 = amp1 .* exp(j*phi);varargout{2} = sum(abs(diff(spir1)));end;end