eclplot creates a plot of estimates with lower and upper confidence limits on one axis against another variable on the other axis. The estimates and lower and upper confidence limits
are stored in three variables, with one observation per confidence interval plotted. Data sets with such variables may be created by the parmest package (downloadable from SSC), or
by statsby or postfile in official Stata. The user has a choice of plotting the confidence intervals horizontally or vertically, a choice of estimate plot types for the estimates,
and a choice of range plot types for the confidence intervals, and may also overlay the confidence interval plot with other plots using the addplot option. In default, eclplot does
not print a legend unless multiple superimposed confidence interval plots are requested, and has “sensible” settings for axis titles and labels (see help for axis_title_options and
axis_options). However, these defaults may be overridden, using the twoway_options.