Is it possible to dereference a string variable inside evalin()?

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legendbb
legendbb 2013-3-12
For example inside a function I have:
VAR_A = 'somevar_in_base';
% I want to test if 'somevar_in_base' by name exist in 'base' workspace
evalin('base', 'exist(''VAR_A'', ''var'')')
local = evalin('base', 'VAR_A');
Above lines do not extend "VAR_A". Is it possible to get what I want with minor changes or should I avoid coding this way?
Thanks,

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采纳的回答

Walter Roberson
Walter Roberson 2013-3-12
evalin('base', sprintf('exist(''%s'', ''var''), VAR_A) )
evalin('base', VAR_A)
You could also consider
try
local = evalin('base', VAR_A);
catch
%do whatever as it does not exist
end

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