ListPlot with small numbers

*To*: mathgroup at yoda.physics.unc.edu*Subject*: ListPlot with small numbers*From*: Simon Chandler <simonc at hpcpbla.bri.hp.com>*Date*: Thu, 22 Oct 92 10:52:16 +0100

22/10/92 Dear MathGroup, Can anyone tell me why Mathematica versions 2.0 and 2.1 won't ListPlot numbers smaller than $MachinePrecision. For example ListPlot[{1 10^-34,2 10^-34,3 10^-34}] results in a graph with y-axes from -0.5 to +0.5 with the points plotted at y = 0. I would have thought, since all numbers in the list are of the same magnitude, that the plotting routines would automatically scale the plot to give a straight line graph with gradient 10^-34. Indeed this was exactly what Mathematica version 1.0 did. Of course a pre-plotting `filter' could be written to do the scaling but why is this no longer automatically done? Simon Chandler Hewlett-Packard Ltd (CPB) Filton Road Stoke Gifford Bristol BS12 6QZ Tel: 0272 228109 Fax: 0272 236091 email: simonc%hpcpbla.bri.hp.com at hplb.hpl.hp.com