Re: [R] Search arrays based on similar values

From: David Winsemius <dwinsemius_at_comcast.net>
Date: Tue, 05 Apr 2011 18:59:42 -0400

On Apr 5, 2011, at 6:34 PM, mjdubya wrote:

> Hey folks,
> I have two arrays: "A" (1X100) with non-ordered values ranging 1-14
> "B" (2X14) containing 14 decimal values.
> I would like to create a new array (1X100) that contains only the
> decimal
> values from array B by associating the integers from A and B. In
> other
> words, for each value of A find the same integer value of B, select
> the
> associated decimal value of B.

Sounds like a job for merge(). Tested solutions offered when reproducible examples are provided.

>
> A B newarray
> 1 1 0.1 0.1
> 1 2 0.3 0.1
> 1 3 0.14 0.1
> 2 4 0.2 0.3
> 3 5 0.82 0.14
> 3 6 0.21 0.14
> 4 . . 0.2
> 7 . . .
> 14 . . .
> 4 14 0.03 .
> 3 .
> 5 .
> . .
> . .

David Winsemius, MD
West Hartford, CT



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