Re: st: line options for overlayed twoway kdensity plots

[Austin Nichols <austinnichols@gmail.com>]

Chris Hajzler <chajzler@gmail.com>:
Are you reading the help files that came with your Stata 8 (just type
-whelp-), or the help files for Stata 11 on the web?
This is for Stata 8 (well, 8.2 --note the free -update- via the web):

sysuse auto, clear
ren mpg x
ren foreign z
tw kdensity x if !z, clc(red)||kdensity x if z
kdensity x, nogr gen(a f)
kdensity x if !z, nogr gen(f0) at(a)
kdensity x if z,  nogr gen(f1) at(a)
line f0 f1 a, clc(red black) name(l)

and this is for Stata 11.1:

sysuse auto, clear
ren mpg x
ren foreign z
tw kdensity x if !z, lc(red)||kdensity x if z
kdensity x, nogr gen(a f)
kdensity x if !z, nogr gen(f0) at(a)
kdensity x if z,  nogr gen(f1) at(a)
line f0 f1 a, lc(red black) name(l)


On Sun, Nov 28, 2010 at 7:02 PM, Chris Hajzler <chajzler@gmail.com> wrote:
> Dear Statalist,
>
> I am trying to change the line options (color, pattern) in an
> overlayed kernel density plot using Stata version 8.
>
> I have generated these plots using a command along the following lines:
>
> twoway (kdensity x1 if (z==1), xscale(r(-1.7(0.5)1.7))) (kdensity x1
> if (z==2), xscale(r(-1.7(0.5)1.7))), ytitle("stuff")
>
> According to online Stata help files, " cline_options" are available
> options using kdensity, such as lcolor and lpattern, but I am having
> trouble figuring out how to include these options (or if, perhaps,
> these options can only be used on more recent versions of Stata).  For
> instance, if I try including "color(black)" or "lcolor(black)" as
> either right before or right after the xscale option, I receive the
> error message  "option lcolor() not allowed". (I know the density
> function may not qualify as a line graph, so I have tried with and
> without the "l" prefix, but this has not worked either.)
>
> Does anyone know how I might change the density line colors/patterns?
>
> Thanks in advance,
> Chris

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