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dichotomy
2003 Apr 17
1
bit set or bit test
Hello, does R have functions for setting and testing
bit values?
I want to conserve memory for storing presence/absence
data for large multiple arrays within a single array,
using element values like
present[x,y] <- ntharray[x,y]*(2^n)
where presence is 1, non-presence is 0 and n is the
nth array
e.g. 1*(2^0) + 0*(2^1) + 0*(2^2) + 1*(2^3) + 0(2^4)
for storing the value 9 for presence in