To do the replacement on a single variable, you just need
x(x < 0.1 | x > 0.3) = NaN;
To apply it to all your variables, there are a few possibilities.
- Type that line 15 times, replacing x with whatever the names of your 15 variables are.
- If the variables are named systematically, as you suggested (i.e. A1, A2, A3), you could try using eval, as Amit suggests. But eval is usually recommended against, because it can cause unexpected outcomes if you're not careful (and it makes for very ugly code).
- My suggestion: just create a function that applies the NaN-replacement to any number of variables.
function varargout = addnans(varargin)
for ii = 1:length(varargin)
varargout{ii} = varargin{ii};
varargout{ii}(varargout{ii} < 0.1 | varargout{ii} > 0.3) = NaN;
end
Then you could call it as
[A1, A2, ...] = addnans(A1, A2, ...)
This will work regardless of the number of variables, or whether the variables follow a systematic naming convention or not. Just make sure your input variables always match your output variables.
