Odp: ^ operator
Hi AFAIK, this is issue of the preference of operators. r-help-bounces at r-project.org napsal dne 16.11.2009 11:24:59:
Hi, I want to apply ^ operator to a vector but it is applied to some of the elements correctly and to some others, it generates NaN. Why is it not
able to
calculate -6.108576e-05^(1/3) even though it exists? tmp [1] -6.108576e-05 4.208762e-05 3.547092e-05 7.171101e-04
-1.600269e-03
tmp^(1/3)
[1] NaN 0.03478442 0.03285672 0.08950802 NaN
This computes (-a)^(1/3) which is not possible in real numbers. You have to use as.complex(tmp)^(1/3) to get a result.
-6.108576e-05^(1/3)
[1] -0.03938341
this is actually -(6.108576e-05^(1/3)) Regards Petr
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