MATLAB: Does table2struct not produce the inverse of struct2table

table2struct invert struct2table

When I convert a structure to a table using struct2table, the original is not returned by using table2struct. I have a 1×1 structure which shows 41 fields when displayed in Workspace, each of which has 207 data values – some are cell some are numeric.

If I convert this using struct2table, and then convert it back using table2struct, I do not get the original structure, but rather a 207×1 structure which has 41 fields. It does not index the same as the original, and so can not be passed on to other functions in the same way.

Why is this and how can I get my original back?

Best Answer

Try using the

S = table2struct(T,'ToScalar',true)

option as shown on the help page

doc table2struct.

This sounds like it does what you are after.

Related Solutions

MATLAB: Display a struct as table

First

convert all of the row vectors to column vectors, and
make sure that they all have the same number of elements (the last one only has five),

then convert using struct2table. This is explained in the struct2table documentation: "struct2table converts a scalar structure array with n fields into an m-by-n table. Each field must have m rows."

MATLAB: Converting nested “summary” structure to table

Here's the loop version. There may be another way, but I didn't have any luck fighting with Matlab's tricky multiple-cell return behaviour

% create minimal test structure
mystruct.Days_from_development = struct('size',[118,1],'Type','double');
mystruct.HIV = struct('size',[52,3],'Type','string');
% get a list of all the fieldnames (i.e. substructures, i.e. names of tables)
table_names = fieldnames(mystruct);
% loop over substructures
for ind=1:length(table_names)
    % get the string for each substructure's name
    tmp = table_names{ind};
    % dump the substructure to a table row
    % by turning it into a 1xN cell array and putting the substructure string as the first cell
    mytable(ind,:) = cell2table([{tmp} struct2cell(mystruct.(tmp))']);
end
% rename the table variables appropriately
mytable.Properties.VariableNames = [{'table_name'};fieldnames(mystruct.(tmp))]

Best Answer

Related Solutions

MATLAB: Display a struct as table

MATLAB: Converting nested “summary” structure to table

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