finding if a variable exists

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joseph Frank
joseph Frank 2011-6-16
I am running an if loop that creates a variable x. at a later stage if x exists I want to use to build other variables. is there any function that tells me for example if x exists x2=x*2; end

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Walter Roberson
Walter Roberson 2011-6-16
if exist('x','var'); x2 = x*2; end
However, it is seldom a good idea to create variables on the fly. Please read this FAQ

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