问题
Could any one tell me about the indexing of a cell Array? I've tried to google it but I could only find unsatisfied result (may be I'm not good in googling). For matrix indexing I found a good document which can be found here. For my case let take a simple example.
a = {ones(10)}
and I want to access the first element of a. Something like
a(1,1) % this will give a 10 x 10 matrix but i am not looking for it.
I can do it by changing it into a matrix like
a = cell2mat(a);
a(1,1)
ans = 1
but is there any direct way to access first element of cell array sub matrix.
回答1:
To access the first element of a the first cell in a cell array, you may do:
a = {ones(10)};
a{1}(1)
If you have multidimensional cell arrays, with multidimensional numerical arrays inside it, you can do:
a{2,3}(4,5)
This will give you element (4,5) of cell (2,3).
回答2:
You actually are accessing the first element of a, and it contains a matrix of 10×10 filled with ones.
Initializing a cell can be done by a = cell(10), and obtaining a certain value of the cell matrix is done with a{i,j}. See also the documentation.
For initializing a cell array with some values, see this question.
来源：https://stackoverflow.com/questions/26295402/how-to-access-the-cell-array-matrix