Error: Index exceeds matrix dimensions.
显示 更早的评论
So I'm trying to access the column of a matrix called EEG.data that I created: EEG.data(chan,:) and I keep getting: Index exceeds matrix dimensions. However, I am able to access EEG.data(chan) which returns the following:
>>EEG.data(chan)
ans =
126.8809 25.0000
and >>size(EEG.data)
ans =
48 233268
Maybe I'm misunderstanding the use of :, but what exactly is my issue here?
采纳的回答
the cyclist
2013-7-25
Just a guess here, but I bet you are doing the equivalent of this:
>> A = magic(7);
>> chan = [3 40];
>> A(chan)
ans =
46 44
>> A(chan,:)
Index exceeds matrix dimensions.
In the first case (which works), you are actually using a linear index to access the 3rd and then the 40th element (counting down successive columns).
In the second case (which gives an error), the syntax is such that you are trying to access the 3rd and 40th rows of A. Hence, the index exceeds the dimension.
2 个评论
Dude
2013-7-25
the cyclist
2013-7-25
No problem. As you may have figured out, ":" actually means "all elements along this dimension".
更多回答（0 个）
类别
在 帮助中心 和 File Exchange 中查找有关 Matrix Indexing 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
