MatLab生成框函数时负索引的错误
 

我已经在Matlab中编写了此函数，以使用Shift K表示Box_Function（-a，+ a），该函数可以很好地工作为K> a，但是当a> K时，第13行的结果为负，并且我得到错误：

[B]数组索引必须是正整数或逻辑值。 [/B]

function B_X = Box_Func(N,K,a) % Heaviside This Function takes Number of Samples N and the % shift K and stem Them , Note it works only for positive shifting % that means K should be positive or Zero if(N N) % if samples Number wrong, or shifting exceeds limit % of Samples Print a warning. warning('Please Enter Valid Positive Integer !'); else % if The inputs are fine , then : B_X = zeros([-NN]); % Allocation of Zero array to our Function Output. for i = -N : 1 : N % Defining Range from -N to N instead of just 1-N % to make plotting more clear to understand. if (i >= Ka) && (i