Graphics Reference
In-Depth Information
twoway
dot
close tradeday, msize(large) msymbol(O)
mfcolor(eltgreen) mlcolor(emerald) mlwidth(thick)
The
dot
command is similar to a
scatterplot but shows dotted lines for
each value of the
1400
-variable, making it
more useful when the
x
-values are
equally spaced. In this example, we
look at the closing price of the S&P 500
by trading day and make the markers
filled with eltgreen with thick emerald
outlines.
Uses spjanfeb2001.dta & scheme
vg blue
x
1350
1300
1250
0
10
20
30
40
Trading day number
2.2
Regression fits and splines
This section focuses on the twoway commands that are used for displaying fit values:
lfit
,
qfit
,
fpfit
,
mband
,
mspline
,and
lowess
. For more information, see [
G
]
graph
twoway lfit
,[
G
]
graph twoway qfit
,[
G
]
graph twoway fpfit
,[
G
]
graph twoway
mband
,
G
]
graph twoway mspline
, and [
G
]
graph twoway lowess
.Weu ethe
allstates
data file, omitting Washington,
DC
, and show the graphs using the
vg s2c
scheme.
twoway (scatter ownhome pcturban80) (
lfit
ownhome pcturban80)
Here, we show a scatterplot of
ownhome
by
pcturban80
. In addition, we overlay
a linear fit
lfit
predicting
ownhome
from
pcturban80
. See
Twoway : Overlaying
(87) if you would
like more information about overlaying
twoway graphs.
Uses allstatesdc.dta & scheme vg s2c
20.0
40.0
60.0
80.0
100.0
Percent urban
% who own home
Fitted values
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