Re: Plotting of Sin(x)/x

*To*: mathgroup at smc.vnet.net*Subject*: [mg84190] Re: Plotting of Sin(x)/x*From*: Bill Rowe <readnewsciv at sbcglobal.net>*Date*: Thu, 13 Dec 2007 01:26:07 -0500 (EST)

On 12/12/07 at 5:13 AM, drmajorbob at bigfoot.com (DrMajorBob) wrote: >This works fine in versions 5.2 and 6: >Plot[Sin[x]/x, {x, -Pi, Pi}] On either version 5.2 or 6 it will be very platform dependent as to whether this works or not. As long as the automatic sampling algorithm on your specific platform doesn't sample too close to x = 0, this will work. But if it does sample at x = 0 it will fail. Plot doesn't simplify expressions. Instead, it merely substitutes a numeric value for x then evaluates the result. And this process will give 0/0 if x is 0. With version 6, the solution is to use the built in function Sinc. With earlier versions, you can define sinc[x] as follows: sinc[0]=1; sinc[0.]=1; sinc[x]:=Sin[x]/x -- To reply via email subtract one hundred and four