autoscale Tcl Command


autoscale - compute a scale for plotting


::dmh::autoscale minimum maximum ?ntic?


This command takes as input uneven minimum and maximum values and computes a scaling that has rounded values encompassing the input values. The command is typically used to compute the scale of a plot. The ntic argument specifies the suggested maximum number of major intervals for the computed scale. It defaults to 8.

The returned value is a four element list of the form {rounded_min rounded_max needed_tic increment} where needed_tic gives the number of intervals of size increment that are needed to span from rounded_min to rounded_max.

autoscale 23.2 67.5
20.0 70.0 5 10.0


Ed Hume, Hume Integration Software


plot, scale