How to get a content of a cell array?

Question

Lara Lirnow 2017-2-15

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https://ww2.mathworks.cn/matlabcentral/answers/325213-how-to-get-a-content-of-a-cell-array

评论： emjey 2020-2-18

采纳的回答： Guillaume

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I have 1x25 cell array, which looks like this :

0.300000 0.410000 ,0.41000 0.430000 ,...

I want to get only first element from the first cell ( 0.300000 ) and put in a variable x, and second element from the first cell (0.410000) and put it into a variable y. How can I do it?

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Answer 1

Guillaume 2017-2-15

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"I have 1x25 cell array, which looks like this :"

0.300000 0.410000 ,0.41000 0.430000 ,...

"if I do e.g"

x=C{1,1} %get the first element

"I still get both cell elements '0.300000 0.410000'"

Clearly, one of these statement contradict the other. My suspicion is that your cell array is:

C = {[0.3, 0.41], [0.41, 0.43], ...}

That is, each cell is a 1x2 matrix. To get the 1st element of the matrix in cell 1:

C{1}(1) 
%or C{1, 1}(1) if you want to use 2D indexing for the cell array 
%or C{1, 1}(1, 1) if you want to use 2D indexing for the matrix as well.

C{1} only gives you the content of the cell, which is a matrix. To access the matrix elements, you use standard () indexing.

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Lara Lirnow 2017-2-16

Thank you so much, this really helped. I actually have cell array where each cell is a 1x2 matrix.

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Answer 2

Easwar Kumar Yarrabikki 2017-2-15

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Hello Lara,

You can do something like

C = { 0.300000 0.410000 ,0.41000 0.430000 }; % your Cell

 x=C{1,1} % extracting first element
 y=C{1,2} % extracting second element
 z=C{1,3} % extracting first element

you can write a simple loop to extract all data at once, if you have very large data.

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Easwar Kumar Yarrabikki 2017-2-15

Hello Lara.., I tried it once Before I actually Post it, Worked fine. I attached screen shot of my work space below .

emjey 2020-2-18

How do I extract first two elements, or the second and third at the same time?

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