On 2011-02-17 07:36, Maas James Dr (MED) wrote:
I'm using the range command to get the minimum and maximum values of an array
as in
x<- range(array_y)
which gives me two values such as
[1] -2 9
I need to be able to test if this range of values includes a third value. For
example I'd like to query
1) does the range of -2 to 9 include 3, answer TRUE
2) does the range of -2 to 9 include -6, answer FALSE?
All values could be negative or positive. Is there a R function that will test
this or do I need to programme it? I have searched but not found one.
Here too you can use findInterval():
findInterval( -2, range(array_y) ) == 1
You may want to set the 'rightmost.closed' argument to TRUE.
Peter Ehlers
Thanks
J
===============================
Dr. Jim Maas
University of East Anglia
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