Is it Possible to store an if Condition in a String to manipulate later ?

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Ian
Ian 2014-10-22
编辑： Guillaume 2014-10-22
Am I able to do something like this in Matlab? Please advice
aaa = 'r > 0 && r < 5 '; if (aaa) r = r+1; end

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Orion
Orion 2014-10-22
编辑：Orion 2014-10-22
you can do that using eval
r=1;
aaa = 'r > 0 && r < 5 ';
if eval(aaa)
r = r+1;
end
disp(r);

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Guillaume
Guillaume 2014-10-22
编辑：Guillaume 2014-10-22
If you really want to store your condition in a string, then use eval as Orion said. However, I wouldn't do that as you don't get an syntax check for the code in your string.
Rather, I'd use an anonymous function:
aaa = @(x) x>0 && x<5; %anonymous function, the name of the variable doesn't matter
if aaa(r) r=r+1;

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