具有递归函数的Matlab中的Parfor

Question

我在Matlab中遇到parfor的问题。我已阅读此http://uk.mathworks.com/help/distcomp/parallel-for-loops-parfor.html但我无法理解如何修复我的代码。我认为函数Inv的递归性质存在问题。你能帮帮我吗？

这是代码的简化版本

R=10;
max_rec=10^3; 
n=20;
set(0,'RecursionLimit',max_rec+4); %set the maximum number of recursions
Res=zeros(R,1);

parfor s=1:R
    XY = unifrnd(0,1,n,2);
    Z=zeros(n,1);
    for p=1:n
        x1=XY(p,1);
        x2=XY(p,2);
        Z(p)=Inv(x1, x2, max_rec);
    end
    Res(s)=sum(Z,1);  
end

function t=Inv(x1,x2,iter)
t = 0;
if iter > 0
      if x1<0.5
         if x2<0.5
            t=(0+Inv(2*x2, 2*x1, iter-1))/4;
         else
            t=(1+Inv(2*x1, 2*x2-1, iter-1))/4;
         end
      else
        if x2>=0.5
           t=(2+Inv(2*x1-1, 2*x2-1, iter-1))/4;
        else
           t=(3+Inv(1-2*x2, 2-2*x1, iter-1))/4;
        end
      end     
end
end