how to plot test function graph?

hello.. i juz wanna ask , using this function how to plot its 2D graph?

function f = dropwavefcn(x)

if strcmpi(x,'init')

      f.PopInitRange = [-2;2] ;
      f.KnownMin = [0 0] ; % For plotting purposes only
  else
      if size(x,2) > 2
          warning('psopt:demos:toomanydims',...
              'Only using first two dimensions of search space')
      elseif size(x,2) < 2
          error('Drop Wave Function requires two dimensions')
      end
      x = reshape(x,1,[]) ;
      f = -(1 + cos(12*norm(x(1:2))))/(0.5*x(1:2)*x(1:2)'+2) ;
  end

i really need the answer as soon as possible...thanks for your concern

[Oleg Komarov]

http://www.mathworks.com/matlabcentral/answers/29922-why-your-question-is-not-urgent-or-an-emergency

Answer 1

[Oleg Komarov]

plot(x,dropwavefcn(x))

[Oleg Komarov]

@siti: does this answer your question?