Subscript indices must either be real positive integers or logicals.

1 次查看（过去 30 天）
alireza kooshafar
alireza kooshafar 2018-10-25
评论： alireza kooshafar 2018-10-25
i got this error in this code i don't know why.
c=[x(1:end-1,:),x(2:end,:)];
dx=c(:,2)-c(:,1);
t=[y(1:end-1,:),y(2:end,:)];
dy=t(:,2)-t(:,1);
ra=[];
rb=[];
for i=1:size(dx)
if dx(2i-1)>0 & dy(2i)<0;
ra(2i-1)=1;
ra(2i)=1;
end
if dy(2i-1)>0 & dx(2i)<0;
rb(2i-1)=1;
rb(2i)=1;
end
end
  1 个评论
Adam
Adam 2018-10-25
Which line is the error on? You can use the stop/pause on errors debug option from the Breakpoints menu to have the code stop at the line causing the error. Then it is trivial to work out what is wrong by looking at any subscript indices you are using in the command window.

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

jonas
jonas 2018-10-25
编辑：jonas 2018-10-25
It's hard to tell without having some input, but these types of lines are definitely wrong:
ra(2i)=1;
i is being interpreted as imaginary, which is why you should not use i as a looping variable.
ans =
0.0000 + 2.0000i
Could be other errors as well.
  6 个评论
显示 4更早的评论
alireza kooshafar
alireza kooshafar 2018-10-25
I have two matrices(dx dy), I'm looking for a condition to check 1. If the first array of dx was a positive (negative), the first array of dy be a negative (positive) array. 2. If the event is the first one, check if the odd arrays of dx and dy will all be the same and the even arrays are exactly the opposite.

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Matrix Indexing 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by