How do i check for empty cells within a list

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Andy 2011-9-21

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https://ww2.mathworks.cn/matlabcentral/answers/16383-how-do-i-check-for-empty-cells-within-a-list

评论： WANG Jason 2020-4-29

How do i check for empty cells within list? I have a list of cells, namelist, and it has 12 values, i need to check if some of the cells are empty. Thanks

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the cyclist 2011-9-21

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在 MATLAB Online 中打开

It is not clear what you mean by a "list of cells". Can you provide some code that illustrates what types of variables you are using? For example, by "cells", do you mean cell arrays?

Without more details, it is hard to answer your question, but there are functions isempty() and cellfun() that might be useful to you.

Edited in response to your comments:

>> cellfun(@isempty,namelist)

does what I think you want. For example:

namelist = cell(2,6)
namelist{1} = 'abc'
namelist{12} = 3
cellfun(@isempty,namelist)

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Jan 2017-11-24

[EDITED, moved from flag to comment] LULU XUE wrote:

It's very useful!! inspiring！ Thanks

WANG Jason 2020-4-29

This solution shows the power of Matrix:)

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topdawgnate 2011-9-21

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在 MATLAB Online 中打开

Use the isempty function http://www.mathworks.com/help/techdoc/ref/isempty.html

%Build Cell array (note the curly brackets)

    A{1,1} = [1 4 3; 0 5 8; 7 2 9];
    A{1,2} = 'Anne Smith';
    A{2,1} = 3+7i;
    A{2,2} = [];

Use the isempty function

isempty(A{2,2}) %Note the difference "{" and "(" brackets

This function will return 1.

Hope this helps. Nate

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Andy 2011-9-21

exactly what i needed, thanks!

the cyclist 2011-9-21

Be aware that this solution checks a single element within a cell array. My solution checks every element in the cell array individually, and reports whether each cell is empty or not. That might be more efficient, depending on your application.

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