[R] converting a string to an integer vector

[BenM]

Hi All,
     Thanks in advance for your help.  I'm trying to convert a string to an
integer vector.  For instance, I will start with

a <- "1,2"

The result I want to end up with will be the equivalent of 

c(1,2)

What's the best way to make the conversion?  I've tried using as.integer(a),
but R seems to balk at that.

Thanks,

Ben



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