MATLAB: How to assign a structure name using an index

namesstructures

Hello, The problem I am having is that when I run the final line of code I receive an error message "Function 'subsindex' is not defined for values of class 'cell'." Abb is a cell array with abbreviations. I am trying to assign the structure name as the abbreviation related the filename I am interested in. Any help would be greatly appreciated.
function [GSF,DateTime,WaterGallon,WUI]=struct_construction(filename)
%%Import date and demand as a function of file name
%Using function to bring in date and demand for specific building
[DateTime,WaterGallon] = date_and_demand(filename);
%%Import building specific attributes (gross square feet, filename,
%%abbreviation, etc.) for all buildings
%Importing attributes from master sheet
[BN,Abb,FN,BuildingType,Year,GSF,Water] = import_master_sheet('Master_sheet.xlsx','Sheet1',2,239);
%%Constructing struct for each building as a function of filename
% Making Struct for Buliding and Computing Water Use Intensity
index = find(strcmp(FN, filename));
B_GSF= GSF(index);
WUI=WaterGallon./B_GSF;
WUI_avg=mean(WaterGallon);
char(Abb(index))=struct('GSF',B_GSF,'DateTime',DateTime,'WaterGallon',WaterGallon,'WUI',WUI,'WUI_avg',WUI_avg);
end

Best Answer

This topic is discussed almost daily. The answer is always the same: Don't do this! See http://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval .
Note that char(Abb(index)) creates a string, a CHAR vector. You cannot assign a struct to a string. I can guess, what you want, but the code is written in the hope, that Matlab understands magically, that you mean the contents of teh string as a variable. This cannot work, and it should not work, because the dynamic creation of arrays causes much more problems than it solves.
Try this:
Data.(Abb{index}) = struct('GSF',B_GSF,'DateTime',DateTime, ...
        'WaterGallon',WaterGallon,'WUI',WUI,'WUI_avg',WUI_avg);
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