为什么高斯函数会给出不一致的参数误差?

我不确定你想要的结果是什么,但你得到这个错误,因为你正在做 matrix division 标量的( [1x1] 尺寸)通过 [2x2] 矩阵。注意,你在做矩阵除法( / ./ 操作员)。

octave:1> function m=gaussian(med, var, n)
>   if ( mod(n, 2)==0 )
>       n=n+1;
>   end;
> 
>   med=double(med);
>   var=double(var);
> 
>   med = min (max(-(n+1)/2, med),  (n+1)/2);
> 
>   m=zeros(1,n);
> 
>   k1=(1/(2*pi*var)^0.5);
>   k2=-0.5.*((med-(1:n)).^2)./var;
> 
>   m(1,1:n)=k1.*exp(k2);
> endfunction
octave:2> debug_on_error (1)
octave:3> gaussian ([101 2 ; 3 4], [4 301 ; 2 1], 2)
error: gaussian: operator /: nonconformant arguments (op1 is 1x1, op2 is 2x2)
error: called from
    gaussian at line 13 column 5
stopped in gaussian at line 13
13:   k1=(1/(2*pi*var)^0.5);
debug> (2*pi*var)
ans =

     25.1327   1891.2388
     12.5664      6.2832

debug> 1/(2*pi*var) # matrix division
error: gaussian: operator /: nonconformant arguments (op1 is 1x1, op2 is 2x2)
error: called from
    gaussian at line 13 column 5
debug> 1./(2*pi*var) # your element by element division works
ans =

   0.03978874   0.00052875
   0.07957747   0.15915494

但是,这并不是唯一的问题,因为下一行对于减号运算符也有类似的问题:

error: gaussian: operator -: nonconformant arguments (op1 is 2x2, op2 is 1x3)
error: called from
    gaussian at line 14 column 5
stopped in gaussian at line 14
14:   k2=-0.5.*((med-(1:n)).^2)./var;

或者,可能函数没有错误,而您得到这些错误是因为您错误地调用了函数。