Hi, There seems to be a problem with the power-operation of the form c(..., -a, ...)^x.yyy Four code examples for the same calculation, which perform differently:
-3^3.2 Result: [1] -33.63474 c(-3,6)^3.2 Result: [1] NaN 309.0893 But: c(-3.62,3)^3 Result: [1] -47.43793 27.00000 I can reproduce NaN even in the following calculation: c(-3,6)[1]^3.2 Result: [1] NaN but c(-3,6)[2]^3.2 Result: [1] 309.0893 Does anybody know this problem and a solution to it? We have tested the calculation under Windows XP for R version 1.6.0 and 1.7.1 Greetings Alex ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help