Graphics Reference
In-Depth Information
10.6
Line patterns
We can specify the pattern we want for a line in three ways. We can specify a word that
selects among a set of predefined styles, including
solid
(solid line),
dash
(a dashed line),
dot
(a dotted line),
shortdash
(short dashes),
longdash
(long dashes), and
blank
(invisi-
ble). There are also combination styles
dash dot
,
shortdash dot
,and
longdash dot
.We
can also use a formula that combines the following five elements in any way that we wish:
l
(letter l, solid line), (underscore, long dash),
-
(hyphen, medium dash),
.
(period, short
dash), and
#
(small amount of space). We could specify
longdash dot
or
" ."
, and they
would be equivalent. See [
G
]
linepatternstyle
for more information.
twoway (line close tradeday,
clpattern(solid)
sort)
(lfit close tradeday,
clpattern(dash)
)
(lowess close tradeday,
clpattern(shortdash dot)
)
In this example, we make a line plot
and use the
clpattern()
(connect line
pattern) option to obtain a solid
pattern for the observed data, a dash
for the linear fit line, and a short dash
and dot line for a lowess fit.
Uses spjanfeb2001.dta & scheme vg s2c
0
10
20
30
40
Trading day number
Closing price
Fitted values
lowess close tradeday
twoway (line close tradeday,
clpattern("l")
sort)
(lfit close tradeday,
clpattern(". ")
)
(lowess close tradeday,
clpattern("-###")
)
We can use the
clpattern()
option
specifying a formula to indicate the
pattern for the lines. Here, we specify a
solid line for the
line
plot, a dot and
dash for the
lfit
plot, and a dash and
three spaces for the
lowess
fit.
Uses spjanfeb2001.dta & scheme vg s2c
0
10
20
30
40
Trading day number
Closing price
Fitted values
lowess close tradeday
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