Hi again,
I have checked the same code (see below) using MATLAB. It produces the
same error (i.e., equal numbers are evaluated as unequal). Do I miss
something?
Thanks for help!
Marc
Marc Jekel schrieb:
Hello R Fans,
Another question for the community that really frightened me today.
The following logical comparison produces a "false" as output:
t = sum((c(.7,.69,.68,.67,.66)-.5)*c(1,1,-1,-1,1))
tt = sum((c(.7,.69,.68,.67,.66)-.5)*c(1,-1,1,1,-1))
t == tt
This is really strange behavior. Most likely this has something to do
how R represents numbers internally and the possible sensitivity of a
computer? Does anyone know when this strange behavior occurs and how
to fix it?
Thank you all! This list is pleasure!!!
Marc
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