2楼: Originally posted by asmeng at 2014-05-01 16:32:26
function g = G_sigma_xy( x,y,p )
sigma = ceil(p/3);
if abs(x)==abs(y)
    g = -exp((-x*x-y*y)/(2*sigma*sigma));
else
    g = 0;
end

3楼: Originally posted by 瑶-Kevin at 2014-05-04 19:23:29
我也是这样写，后来得到的结果都是0.得不到想要的函数，你觉得呢？...

4楼: Originally posted by asmeng at 2014-05-04 19:37:29
不会吧。我试过，你试试G_sigma_xy(2,-2,1).
>> G_sigma_xy(2,-2,1)
ans =
       -0.0183156388887342...