PROCEDURE: get_ylimits, datastr, limits, trg PURPOSE: Calculates appropriate ylimits for a string array of "TPLOT" variables to be plotted in the same panel. INPUT: datastr string array of TPLOT variables limits limits structure to be modified (usually the limits structure of the TPLOT variable whose data field is a string array of TPLOT variables) trg time range over which to calculate the limits; double[2] CREATED BY: Peter Schroeder LAST MODIFIED: %W% %E%