Re: Simple equation won't plot

*To*: mathgroup at smc.vnet.net*Subject*: [mg82955] Re: Simple equation won't plot*From*: Helen Read <hpr at together.net>*Date*: Sun, 4 Nov 2007 06:15:48 -0500 (EST)*References*: <fghbpj$jnk$1@smc.vnet.net>*Reply-to*: HPR <read at math.uvm.edu>

Bert Aerts (rm x) wrote: > When I type following commands in Mathematica 6.0.1: > m = 70; a = 0.08; x0 = 5000; g = 9.81; > x[t_] = x0 - m*Log[Cosh[t*Sqrt[g*a]/Sqrt[m]]]/a; > P1ot[x[t], {t, 0, 60}] > I don't get a plot, but instead: > P1ot[5000 - 875. Log[Cosh[0.105884 t]], {t, 0, 60}] Try fixing the typo. You have a numeral one instead of the letter l in Plot. > Why is t_ used in the second equation? This identifies t as an argument in the function. -- Helen Read University of Vermont