[R] How to check to see if a variable is within a range of another variable

[Peter Alspach]

Tena koe Kate

If kateDF is a data.frame with your data, then

apply(kateDF, 1, function(x) isTRUE(all.equal(x[2], x[1], check.attributes = FALSE, tolerance=0.1)))

comes close to (what I think) you want (but not to what you have illustrated in your 'eventual outcome').  Anyhow, it may be enough to allow you to get there.

HTH ....

Peter Alspach

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of Kate Ignatius
Sent: Thursday, 2 October 2014 11:11 a.m.
To: r-help
Subject: [R] How to check to see if a variable is within a range of another variable

Is there an easy way to check whether a variable is within  +/- 10% range of another variable in R?

Say, if I have a variable 'A', whether its in +/- 10% range of variable 'B' and if so, create another variable 'C' to say whether it is or not?

Is there a function that is able to do that?

eventual outcome:
A B C
67 76 no
24 23 yes
40 45 yes
10 12 yes
70 72 yes
101 90 no
9 12 no

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