Re: Plotting

*To*: mathgroup at smc.vnet.net*Subject*: [mg2173] Re: Plotting*From*: browe at netcom.com (Bill Rowe)*Date*: Thu, 12 Oct 1995 01:58:03 -0400*Organization*: Hughes Aircraft Company

In article <44qj7k$s22 at ralph.vnet.net>, Julian Charko <jcharko at microage-ll.awinc.com> wrote: >In order to plot the function f(x) = a^x, where a<0, over a >range of integer values of x, what plotting options would you >need to use with the Plot command? > >Specifying a plotting range of real numbers in the usual way, >as shown below, for example, presents problems because >Mathematica generates complex numbers for fractional exponents, >and these obviously cannot be plotted by Plot. > > Plot[(-1)^x, {x, -5, 5}] How about either Plot[Re[(-1)^x], {x, -5, 5}] or Plot[Im[(-1)^x], {x, -5, 5] I realize neither of these is the same as the function you asked about. However, the problem isn't with Mathematica. After all it wasn't Mathematica that decided Sqrt[-1] is complex. -- "Against supidity, the Gods themselves contend in vain"