Well, using dynamically named variables is not recommended for exactly this reason. You end up peppering your whole code with eval everywhere (and you lose syntax checking, speed optimisation, ease of debugging). So the first question is: do you actually need dynamically named variables? Can't you use cell arrays, n-d matrices, or other type of containers and avoid this headache?
If you can't, I'd create a subfunction in which you can use assignin and evalin, instead of eval, for cleaner code:
function ndgridvar(varnames)
%varnames: a cell array of variable names that exist in the calling function
%the function creates variables with the same names by capitalised in the caller workspace
%get values of variables into a cell array, normally I'd use cellfun
%but you can't use evalin in an anonymous function
inputs = cell(size(varnames));
for v = 1:numel(varnames)
inputs{v} = evalin('caller', varnames{v});
end
%create output cell array
outputs = cell(size(varnames));
%call ndgrid
[outputs{:}] = ndgrid(inputs{:});
%assign to variables into caller, again can't use cellfun
for v = 1:numel(varnames)
assignin('caller', upper(varnames{v}), outputs{v});
end
end
