Introduction to Stata 8 - (GRIPS

14.7. Examples
On the following pages you find illustrations of some important graph types, including the
commands that generated the graphs. The appearance is different from the manual's graphs; it
was determined by my schemes lean1 and lean2, described in section 14.9.
For each graph you see the do-file that made it, including the data for the graph or a use
command. I suggest letting do-files generating graphs always start with a gph. prefix, for
easy identification.
In the illustrations I reduced the graph size by the xsize() and ysize() options. This,
however, leads to too small text and symbols, and I enlarged them by the scale() option.
twoway graphs have continuous x- and y-axes. Many plot-types fit in twoway graphs;
exceptions are graph bar, graph box and graph pie.
histogram
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N of children
60
40
20
0
1000 1500 2000 2500 3000 3500 4000 4500 5000
Birthweight, grams
A histogram depicts the distribution of a continuous variable. The y-axis may reflect a count
(frequency), a density or a percentage; the corresponding normal curve may be overlaid.
Histograms are documented in [R] histogram and in [G] graph twoway histogram.
// c:\dokumenter\...\gph.birthweight.do
use "C:\dokumenter\...\newborns.dta" , clear
set scheme lean2
histogram bweight ///
, ///
frequency ///
normal ///
start(750) width(250) ///
xlabel(1000(500)5000) ///
xmticks(##2) ///
xtitle("Birthweight, grams") ///
ytitle("N of children") ///
plotregion(margin(b=0)) ///
xsize(4) ysize(2.3) scale(1.4)
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