Replace missing values in a row with the set of all possible values in that row for a data table.
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If I have a large dataset and there are some missing values in each row. I want to repalace missing values of a row with the set of all possible values of that row. How can I do so?
2 Comments
Bob Thompson
on 1 Feb 2019
I want to repalace missing values of a row with the set of all possible values of that row.
I'm a little confused. Do you want to replace each value with a set of values, replace all missing values with an equal number of possible values, or just attach all possible values at the end?
Accepted Answer
Stephan
on 2 Feb 2019
Hi,
the following script should do what you want:
% set options and import data
opts = spreadsheetImportOptions("NumVariables", 5);
opts.Sheet = "Sheet1";
opts.DataRange = "B2:F6";
opts.VariableTypes = ["double", "double", "double", "double", "double"];
Data = readtable("example.xlsx", opts, "UseExcel", false);
Data_new = table2cell(Data);
% manipulate data the way you wish
for k = 1:size(Data,2)
[r, ~] = find(isnan(Data{:,k}));
c = unique(Data{:,k});
c(isnan(c)) = [];
for d = 1:numel(r)
Data_new{r(d),k} = c';
end
end
% clean up
clear opts Data c d r k
The resulting cell array can be seen here:
![cell_array_result.PNG](https://www.mathworks.com/matlabcentral/answers/uploaded_files/202479/cell_array_result.png)
Best regards
Stephan
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