[R] R functions in Java

[lord12]

Suppose I have a function in R called foo.

foo = function(x)
{
   print(x);
}

When I create the Rengine re and do re.eval("foo(1)") I get the output 1. 
However, if I create a string variable in java String num = 1 and do
re.eval("foo(num)"), I get an error saying that num cannot be found. How can
I fix this problem.
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