[R] Conversion of column matrix into a vector without duplicates

From: Shubha Vishwanath Karanth <shubhak_at_ambaresearch.com>
Date: Wed 24 Jan 2007 - 13:12:46 GMT

Hi R,  

I have a matrix A,  


      [,1] [,2]

[1,] a u

[2,] b v

[3,] c x

[4,] d x

[5,] e x

I want to put the 2nd column of this matrix in a vector without duplicates. i.e., my vector v should be (u, v, x), whose length is 3.  

Can anybody help me on this?  

Thanks in advance


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