help plotbeta
-------------------------------------------------------------------------------

Title

Plots the estimates from a series of lincom commands

 Syntax

        plotbeta exp [, options]

    options               Description
    -------------------------------------------------------------------------
    Main
      position(numlist)    specifies the position of the confidence
                            intervals.
      eform                specifies that the exponentiated form the
                            parameters be plotted.
      vertical             specifies that the confidence intervals are
                            plotted vertically.
      level(#)             specifies the confidence level.
      labels               specifies that variable labels are used in the
                            plot.
      savedata(filename)   specifies that the data in the final plot should
                            be saved.
      addplot(graph)       specifies that an additional twoway graph is added
                            to the plot.
      twoway_options      
    -------------------------------------------------------------------------

where exp is defined

         lincom_exp [|] 

and where lincom_exp may be any linear combination of coefficients that is
valid syntax for test. Note, however, that exp may not contain an equal sign.


Description

This command will plot the parameter estimates and confidence intervals from a
series of lincom commands.

Updating this command using SSC

To obtain the latest version click the following to install the new version

ssc install plotbeta,replace

Options

    position(numlist) specifies the position of the confidence intervals. The
        default is that the point estimate and confidence intervals are
        plotted at points 1 2 3 ... It is possible to group confidence
        intervals in different parts of the plots e.g.  1 2 3 3.1 3.2, here
        the last three confidence intervals will be much closer to each
        other.

    eform specifies that the exponentiated form the parameters be plotted.

    labels specifies that if the lincom expression is a variable then that
        variable's label is used instead of the variable name.  This option
        is particularly useful if the linear predictor is made up entirely of
        main effects.

    vertical specifies that the confidence intervals are plotted vertically
        rather than the default of horizontally.

    level(#) specifies the confidence level, in percent, for confidence
        intervals; see level.

    savedata(filename) specifies that the data in the final plot should be
        saved.

    addplot(graph) specifies that an additional twoway graph is added to the
        plot. This is particularly useful for adding additional datapoints
        using twoway_scatteri.

Examples

A linear regression using the auto data, click the highlighted text in order

  sysuse auto, clear
  reg price mpg turn length
  plotbeta mpg | turn | length
  plotbeta mpg | turn | length, labels
  plotbeta mpg | turn | length, addplot((scatteri 2.5 2.5, ms(S) msize(*2))) la
> bels

To remove the green text on the right hand side of the plot you need to add in
the following two options

  plotbeta mpg | turn | length, addplot((scatteri 2.5 2.5, ms(S) msize(*2)))
  labels ylab(none, axis(2)) ytitle("", axis(2))

This is the most basic graphic and using twoway options the look can be
improved.  The following command puts the confidence intervals

  plotbeta mpg | turn | length | mpg-length , xtitle(Parameters)
  yscale(range(0.7 4.3) axis(1)) yscale(range(0.7 4.3) axis(2))
  title(Coefficients and Confidence Intervals) subtitle(from a Simple Linear
  Regression) xline(0, lp(dash))

An example using Survival data, click the highlighted text in order

  sysuse cancer
  stset studytime, f(died)
  xi:stcox i.drug age
  plotbeta _Idrug_2 | _Idrug_3
  plotbeta _Idrug_2 | _Idrug_3, labels eform savedata(temp,replace) 

Using the twoway options to solve a problem with labelling

  plotbeta age | _Idrug_2 | _Idrug_3, eform labels xline(1, lp(dash)) 

Note that by adding age into the estimates the ylabels are off the graph. This
is due to the single quote in the variable label. Either change the label or
alter the graphregion size

  plotbeta age | _Idrug_2 | _Idrug_3, eform labels xline(1, lp(dash))
  graphregion(margin(l+40 r+15))

Author

Adrian Mander, MRC Biostatistics Unit, Cambridge, UK.

Email adrian.mander@mrc-bsu.cam.ac.uk

Also see

Related commands

HELP FILES
lincom