assigning value to a changing struct field

Hello, I'd like to asiign a value to a struct with changing fields, but get a 'dimension mismatch' error. my code is as follows:

        gear_ytpe=['P' 'G'];
        axis=['x' 'y' 'z']
        for ii=1:2
            for jj=1:3
        statistics.Envelop.CF.gear_ytpe(ii).Diff.axis(jj)=1:1:1000
            end
        end  
        

Thnks in advance,

Nadav

[Stephen23]

Note that in MATLAB the square brackets [] are a concatenation operator, so this:

axis = ['x' 'y' 'z']

is exactly equivalent to this:

axis = 'xyz'

MATLAB does not have a "list" operator.

Answer 1

[madhan ravi]

 gear_ytpe={'P', 'G'};
 axis={'x' ,'y' ,'z'};
 for ii=1:2
    for jj=1:3
  statistics.Envelop.CF.gear_ytpe{ii}.Diff.axis{jj}=1:1:1000;
     end
 end 

[nadav silberman]

thank you for your answer, but that doesn't solve my problem.

If you'll look in the struct after it is being created you'll notice the field "statistics.Envelop.CF.gear_ytpe". I don't want the field gear_ytpe. instead I want two fields - "P" and "G", which are the cells inside gear_ytpe variable

Answer 2

[Stephen23]

ytpe = {'P','G'}; % more robust as cell array.
axis = {'x','y','z'};  % more robust as cell array.
for ii = 1:numel(ytpe)
    fi = ytpe{ii};
    for jj = 1:numel(axis)
        fj = axis{jj};
        statistics.Envelop.CF.gear_ytpe.(fi).Diff.axis.(fj) = 1:1:1000
    end
end

See:

https://www.mathworks.com/help/matlab/matlab_prog/generate-field-names-from-variables.html