How do I delete a row based on the based of the first column cell?

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Brady Thom 2012-6-28

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For example. If I wanted to delete each row that contained the number 10 in the first column, how can I do that. Essentially is acts like a filter and deletes all the rows with that value.

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Answer 1

the cyclist 2012-6-28

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https://ww2.mathworks.cn/matlabcentral/answers/42275-how-do-i-delete-a-row-based-on-the-based-of-the-first-column-cell#answer_52035

在 MATLAB Online 中打开

If x is your array,

x(x(:,1)==10,:) = [];

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Brady Thom 2012-6-28

编辑：Brady Thom 2012-6-28

Thank you for the speedy response! If you have a second, maybe a little description of what the notation does? I am just trying to learn and be more self sufficient

Ryan 2012-6-28

编辑：Ryan 2012-6-28

x(:,1) == 10 returns a logical vector (1 for a 10, 0 otherwise). He's searching all rows (:,) and just the first column (,1).

x(logical vector,:) is locating the row's that have the 10 in the first column from before (dictated by the x(:,1) == 10) and saying select all the columns (,:) of those rows and then delete them by setting them equal to [].

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