How to index a cell with two columns?

Question

Lei 2012-4-30

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https://ww2.mathworks.cn/matlabcentral/answers/37055-how-to-index-a-cell-with-two-columns

Hello, everyone. I have a cell which looks like this:

446000000000  774.706000000000
706000000000  773.246000000000
246000000000  772.906000000000
906000000000  770.906000000000
906000000000  770.116000000000

Is there a way to extract data or index from this cell to get a result like the below one?

446000000000  
706000000000  
246000000000  
906000000000  
906000000000  
116000000000

Basically,I want get all of the data from the first column and last one from second column since the other data are repeated which are useless for me. Anybody would like to help me out...thanks a lot!

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Answer 1

Richard Brown 2012-4-30

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https://ww2.mathworks.cn/matlabcentral/answers/37055-how-to-index-a-cell-with-two-columns#answer_46299

在 MATLAB Online 中打开

[data(:, 1); data(end,2)]

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Richard Brown 2012-4-30

A cell array is pretty much like a regular array, except that the contents are "cells" rather than numbers. So you can manipulate them the same way as with regular arrays.

You only use the cell indexing {} when you want to get at what is inside the cells.

So what I did was to vertically concatenate the first column (data(:, 1)) with the last entry of the second column (data(end,2)). This is exactly the same command as I'd use if your data was just in a regular matrix.

Lei 2012-5-1

yeah,that make sense.I know how to index cell arrays,I just never used the 'end' before and did not think to put them in a single matrix. Thanks again for your help! This really helps me!

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