How do i set empty matrix elements to zero?

Question

joakim johansen 2019-3-11

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https://ww2.mathworks.cn/matlabcentral/answers/449404-how-do-i-set-empty-matrix-elements-to-zero

评论： Rik 2019-6-20

How can i set the empty elements in the above picture to zero, i have tried T = cellfun('isempty', Z),

but it does not recognize the cells as empty.

Anyone got ideas of how to do this?

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Guillaume 2019-3-11

It's impossible for us to know from a screenshot what type of data you have. Assuming it's a cell array, it's also impossible for us to know if the cells are actually empty.

It's much better if you attach your data as a mat file. Screenshots are useless.

KALYAN ACHARJYA 2019-3-11

编辑：KALYAN ACHARJYA 2019-3-11

Please attach the file, so that we can try on it.

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Answer 1

Navdha Agarwal 2019-6-20

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https://ww2.mathworks.cn/matlabcentral/answers/449404-how-do-i-set-empty-matrix-elements-to-zero#answer_380077

在 MATLAB Online 中打开

Following assumptions are made for the solution stated below:

The csv file is being read as a matrix and some cells are actually empty.
The name of the file is 'file1.csv'
When the file is read as the matrix, the empty cells are automatically recognized as 'NaN'.

The code for the question, keeping the above assumptions is:

A = readmatrix('file1.csv');
dim = size(A);
for i = 1:dim(1)
    for j = 1:dim(2)
        if isnan(A(i,j))
        A(i,j) = 0;
        end
    end
end
disp(A)